HyreElectrical

HyreElectrical tools

Can your panel take an EV charger, as leftover amps, not the sticker

A 32 A Level 2 charger is 40 A of demand once it is treated as a continuous load. A 48 A unit is 60 A. Spare is existing service minus existing calculated demand — not the number printed on the dead front. If leftover does not cover that circuit, NEC 625.42 energy management may size the charger to available capacity instead of a service upgrade. Live electrical work is not DIY. HyreElectrical does not perform electrical work.

32 A → 40 A at 125% continuous 48 A → 60 A on the same rule. Spare = service − existing demand. Headroom, 625.42 load management, or a service conversation. Illustrative, not a stamp.

Stop if you were about to open the panel to “check.” This page does not need the cover off, and live work is licensed work. Type the service size and a calculated demand from the electrical load calculator (or from an electrician). A 32 A EVSE is 40 A of demand at 125%; a 48 A EVSE is 60 A. If spare covers that figure, the output is headroom on these numbers. If it does not, and load management is available, 2023 NEC 625.42 lets an energy management system set the EVSE load to the capacity it is allowed to use — an electrician confirms that against the edition your jurisdiction adopted. If load management is not in play, the sentence is a service or load-management conversation, not a shopping cart.

This is not the whole-house load calculator, not the heat-pump-plus-dryer-plus-EV stack, and not the Level 1 versus Level 2 selector. Amps and spaces fail independently: count two-pole slots on the panel space checker. A permit and an inspection are local rules, not a national checkbox. The output is an estimate. It is never a quote, a permit, or a reason to land conductors. HyreElectrical does not perform electrical work.

Service, existing demand, one EVSE current

Spare is leftover, not the sticker. Nothing is emailed. Do not open the panel to use this.

60, 100, 150 or 200 are the common residential sizes. 0 until you know it. Not the leftover.

From the load calculator, or a figure an electrician already wrote down. 0 means you have not typed it — the engine will refuse to treat the service rating as spare.

Charger current, not the breaker. 32 A is the common 40 A-class residential Level 2.

Yes only if a listed energy management system will actually limit the EVSE. An electrician confirms listing, setpoint and the adopted edition.

EVSE demand at 125%
Spare on the figures you typed
The conversation
What this is not

What this assumed

EVSE × 1.25 versus service minus existing demand. Headroom, 625.42, or a service conversation. Illustrative, not a stamp. Live work is not DIY. HyreElectrical does not perform electrical work.

Do not open the panel to use this page

The readiness form wants two numbers you can type from a document: the service rating, and a calculated demand. Neither of those is obtained by removing a dead front on a live service. The Electrical Safety Foundation International’s standing public guidance is that service and panel work are not DIY. A burning smell, sparking, a breaker that will not hold, or a cover that is already off is a stop condition — de-energise what you can from a known-good switch and call a licensed electrician. Do not keep resetting. Do not “just look.” If you do not know the service rating, where to find your electrical service size names the documents and labels it is printed on.

A photograph of a closed door is enough to read the service sticker if it is printed there. It is not enough to count spaces, spot tandems, or rule out a double-tap. The panel space checker will tell you that counting from a closed-door photograph misses those defects; it will not tell you to take the cover off. HyreElectrical does not open panels and does not perform electrical work.

What this tool is, and the three tools it is not

Four calculators on this site sit next to each other and answer four different questions. Mixing them is how a leftover-amps check gets treated as a stamped load calculation, or how a miles-and-hours selector gets treated as a panel verdict.

The electrical load calculator is a whole-house demand estimate in the shape of the optional calculation in 2023 NEC 220.82: first 10 kVA of general load at 100 percent, remainder at 40 percent, HVAC at 100 percent, EVSE at 125 percent as a continuous load. It is the house-shaped number. This page does not restamp that article. It takes the demand figure that article (or an electrician) already produced, subtracts it from the service, and asks whether one Level 2 circuit still fits.

The electrification readiness checker asks whether a heat pump, an electric dryer placeholder and an EVSE fit in spare you already typed, together. That is a stack. This page asks only whether one Level 2 circuit fits, and it is the page that surfaces 625.42 energy management when the answer is no. A house that “has room for the charger” on this form can still fail the stack the moment a heat pump and a dryer are in the same plan.

The EV charger selector decides Level 1 versus Level 2 from daily miles, hours on the plug, and whether 240 V already exists at the parking spot. It uses planning placeholders of about 4 miles per hour on Level 1 and about 25 miles per hour on a 32 A Level 2. It will not pick a SKU, and it will not size leftover amps. Run it before this page if you have not yet decided that a 240 V circuit is even the next conversation. The Department of Energy’s Alternative Fuels Data Center notes that many owners meet daily range on Level 1 overnight, provided a dedicated branch-circuit outlet is available near the parking location — which is a selector question, not a leftover-amps question.

The circuit estimator is the sibling that turns the same current into a breaker class and a run sentence. A 32 A EVSE is a 40 A class; a 48 A EVSE is a 60 A class. This page never names a breaker. Use them in that order: selector (is Level 2 the job), load calculator (what does the house already draw), this page (does one circuit fit the leftover), circuit estimator (what class is the branch), panel space (are there two slots). Do not run this as a substitute for 220.82.

NEC 625.41, 625.42 and 220.57 — model code, edition is local

NFPA 70, the National Electrical Code, is a model standard. The Electrical Safety Foundation International’s adoption page, retrieved 5 September 2026, is the reminder that the NEC is commonly mandated by state or local law, that it is revised every three years, and that adoption lags. A sentence that is true of the 2023 model book is not automatically true of a 2020-NEC state. Nothing on this page is a determination about a particular dwelling. The adopted edition, the local amendments, and a load calculation signed by a licensed electrician are what govern.

2023 NEC 625.41, as summarised in EC&M’s code quiz by John Lupacchino (alternate, Code-Making Panel 3), sizes overcurrent protective devices for feeders or branch circuits supplying EVSE at not less than 125 percent of the maximum load of the equipment. That is the 1.25 on this form. A 32 A EVSE is therefore 40 A of demand here, not 32. Typing 32 and reading 32 is how a tight 100 A service looks like it has room it does not.

2023 NEC 625.42, reprinted with NFPA permission in Leviton’s Captain Code 2023, does two further things. Electric vehicle charging loads are continuous for the purposes of the article. Service and feeder are sized in accordance with the product ratings, unless the overall rating of the installation can be limited through controls as permitted by 625.42(A) or (B). (A) is an energy management system complying with 750.30: the maximum EVSE load on the service and feeder is the maximum load the EMS permits. The EMS may be integral to one piece of equipment or to a listed system of more than one piece, and it must be marked when the control is integral. (B) is EVSE with restricted-access adjustable settings complying with 750.30(C); the adjusted current may be used as the rating. This tool only models (A) as a yes/no. It does not commission an EMS, pick a setpoint, or declare your city has adopted 2023.

2023 NEC 220.57 is a different article and a different operation. Leviton’s Captain Code reprint, with NFPA permission, states: “The EVSE load shall be calculated at either 7200 watts (volt-amperes) or the nameplate rating of the equipment, whichever is larger.” The 7,200 VA floor is based on a 30 A, 240 V, single-phase circuit. Thomas Domitrovich, sitting on Code-Making Panel 2, records the same floor in EC&M’s 2023 electrified-home article and in Eaton’s companion commentary. 220.57 does not designate dwelling versus non-dwelling; Leviton’s comment is that it would apply to all locations. Separately, 2023 220.53 was revised so EVSE is not included in the 75 percent demand factor that can apply to four or more fastened-in-place appliances. That exclusion is why a charger is not “just another appliance” in a standard calculation.

This tool does not restamp 220.57. It tests leftover amps against the EVSE current you typed, multiplied by 1.25. On a 16 A unit that difference matters: nameplate is 3,840 VA at 240 V, this form’s demand is 20 A, and a 2023 standard calculation applying 220.57 would count 7,200 VA. On the default 32 A unit the nameplate is already 7,680 VA, above the floor, so 220.57 and this form are closer. An electrician applying the adopted edition may count more than this form does, especially on a 16 A charger in a 2023-NEC jurisdiction using the standard calculation. The optional dwelling calculation in 220.82 — the shape of the load calculator on this site — uses nameplate rather than 220.57; some authorities having jurisdiction treat EVSE at 100 percent in that optional calc because the load can run for more than three hours. That is an AHJ question. This page will not pretend to settle it.

How 2017, 2020 and 2023 treat the same charger

Edition625.41 overcurrent625.42 continuous / management220.57 7,200 VA floorWhat this means on a house
2017EVSE treated as continuous; branch and feeder sized at 125% of the equipment loadAutomatic load management system: the maximum equipment load on a service and feeder is the maximum load the ALMS permitsSection does not existThe EVSE line in the calc can already be the managed maximum, not the nameplate. No 7,200 VA floor.
2020Same 125% continuous treatment for EVSESame ALMS sentence, plus adjustable settings on fixed-in-place EVSE, with the adjusted rating required on the labelSection does not existA locked-down amp setting on the charger can be the counted load. Still no 7,200 VA floor, and no 220.70 whole-service setpoint.
2023625.41: OCPD for feeders or branch circuits supplying EVSE sized at not less than 125% of the maximum load of the equipment625.42(A) listed EMS per 750.30, or (B) restricted-access adjustable EVSE. 625.40 exception: multiple EVSEs on one branch when (A) or (B) appliesNew: larger of 7,200 VA or nameplate. EVSE also excluded from 220.53’s 75% appliance demand factor. 220.70: EMS setpoint may be used in the feeder or service calc, as a continuous loadThe service itself can be calculated at a marked setpoint. A 16 A charger may count as 7,200 VA in a standard calc. This form still uses current × 1.25 against leftover.

2017 625.42 from the Village of Tinley Park EVCS Guide reprint and ElectricalLicenseRenewal’s 2017/2020 quotation. 2023 625.41 from EC&M (Lupacchino). 2023 625.42 and 220.57 from Leviton Captain Code reprints with NFPA permission, and from Domitrovich / Eaton. 2023 220.70 from ElectricalLicenseRenewal’s side-by-side (page dated 15 January 2026). Retrieved 5 September 2026.

This is the model book. IAEI’s statewide table, checked the same day, is the geographic fact: Florida is on the 2020 NEC (effective 31 December 2023); California’s 2025 Electrical Code is based on the 2023 NEC and took effect 1 January 2026; Colorado and Wyoming are on 2026; Tennessee is on 2017; the District of Columbia is on 2014. Ask the building department, not this table.

The edition lag is the fact that changes the sentence

IAEI’s statewide adoption table, retrieved 5 September 2026, is not a substitute for the building department, but it is enough to kill the idea that “the NEC” is one rule. A 2020-NEC state already has the 625.42 automatic-load-management sentence and adjustable-settings language. It does not have 220.57, 220.70, or the 2023 (A)/(B) split. A 2017-NEC state has the ALMS sentence and nothing of the 2023 listing and marking detail. A 2026-NEC state has the Power Control System language that the 2026 model moved to Article 130 / 120.7, including an 80 percent cap on the control setting — a 2026 provision, not a 2023 rule, and not in force in a 2020-NEC state.

Florida’s statewide adoption, on that IAEI table, is the 2020 NEC. California’s 2025 Electrical Code is based on the 2023 NEC and took effect 1 January 2026. Those two states are a large share of U.S. EV registrations — AFDC’s downloadable state file, as of 31 December 2023, put California at about 1.26 million all-electric light-duty vehicles and Florida at about 255,000 — and they are not on the same edition. Registration volume is why this query is common. It is not evidence that a given service can carry 40 A or 60 A of continuous charging. This page describes 2023 625.42(A) when you mark EMS yes. An electrician confirms listing, fail-safe behaviour, and whether the adopted edition matches that sentence.

Three worked examples, including the one the sticker conceals

The arithmetic this engine actually runs is spare = existing service − existing calculated demand, then EVSE demand = EVSE amps × 1.25. If spare covers that demand, the talk line is leftover. If it does not, and EMS is marked no, the talk line is a service or load-management conversation. If it does not, and EMS is marked yes, the talk line is the 625.42 sentence. Demand of 0 A is refused as spare equal to the service rating, because that is the usual way this arithmetic misleads.

A 100 A house and a 32 A EVSE. Service 100 A, existing demand 78 A from the load calculator, EVSE 32 A, EMS no. Spare = 22 A. EVSE demand = 40 A. Talk: spare of 22.0 A is short of 40.0 A EVSE demand. That is a service or load-management conversation, not a shopping list. Lawrence Berkeley National Laboratory and the National Renewable Energy Laboratory, in a February 2026 Journal of Building Engineering paper, estimated that 29 percent of U.S. single-family homes have 100 A panels and another 2 percent sit below 100 A — 31 percent at 100 A or smaller. That is why this example is the common one, not a curiosity. The 31 percent is a modelled estimate on ResStock, with training data concentrated in California and Minnesota; it is not a census of your street, and it is not a finding that every 100 A house fails.

A 200 A house already near capacity. Service 200 A, existing demand 175 A, EVSE 32 A, EMS no. Spare = 25 A. EVSE demand = 40 A. Talk: spare of 25.0 A is short of 40.0 A EVSE demand. The dead front says 200 A. The leftover is 25 A. A 48 A wall unit would be 60 A of demand against the same 25 A, a wider miss. LBNL estimated 55 percent of single-family homes at 200 A and 3 percent above — 58 percent at 200 A or more — which is why “we have a 200 A panel” is the sentence people treat as a verdict. It is the rating of the box. Spare is what is left after the house. A 200 A service with 155 A of existing demand and a 32 A charger is the happier sibling of this example: spare 45 A, EVSE demand 40 A, 5.0 A still spare on these figures. Five amperes is not a design margin you take to the permit counter. It is a reason to have an electrician run the adopted-code calculation, and to count two spaces.

EMS derate to 16 A. Take the 100 A / 78 A house again. Spare is still 22 A. Mark EMS yes and leave the charger at 32 A: the engine does not invent 18 A. It changes the sentence. NEC 625.42 energy management may size the EVSE to available capacity instead of a service upgrade — an electrician confirms. The confirmation is the listed system, the setpoint, the field marking, and the adopted edition. If the listed path (or 625.42(B) restricted-access adjustable settings) actually limits the EVSE to 16 A, type 16 A as the desired current: demand becomes 20 A against 22 A spare, and the talk line is 2.0 A still spare on these figures after a 16 A EVSE at 125%. That is headroom on these figures, knife-edge, and slower. The selector is where miles and hours say whether a 16 A overnight charge still covers the day. This page will not pick among a service change, a listed EMS at 32 A, and a 16 A derate.

NREL/TP-5500-95492 (August 2025), a CRADA final report with Redwood Energy and NeoCharge, ran the mechanism rather than asserting it. In NREL’s Systems Performance Laboratory the panel was “effectively downsized to 70 A in software (the actual panel limit was 150A).” The system “successfully throttled the Wallbox EV charger load from 28 A to 6 A,” reducing peak from 64 A to 42 A (35 percent). When a dryer came on while the car was at 28 A, the charger dropped to 16 A and returned to 28 A “after approximately one minute.” Detection-to-reduction latency was 15–23 seconds. The report’s own limit: the vehicle could accept only 28 A; the authors note that a typical Level 2 charger draws up to 40 A (9.6 kW). It validates the mechanism under those test conditions. It is not a finding that every listed EMS will produce a 35 percent peak cut, and it is not a permit.

The same four currents, three ways of counting them

EVSE currentThis form (current × 1.25)Nameplate VA at 240 V2023 220.57 (larger of 7,200 VA or nameplate)
16 A20 A demand3,840 VA7,200 VA — the floor binds
32 A (default)40 A demand7,680 VA7,680 VA — above the floor
40 A50 A demand9,600 VA9,600 VA
48 A60 A demand11,520 VA11,520 VA

This form’s 125% is 2023 NEC 625.41 / 625.42 continuous-load shape against leftover amps. 220.57 is a 2023 standard-calculation floor, reprinted in Leviton Captain Code with NFPA permission; 7,200 VA is 30 A × 240 V. AFDC’s Level 2 note — most residential units at up to 30 A, dedicated 40 A circuit under Article 625 — is why 32 A is the default here, not a 40 A charger.

A 2020-NEC or 2017-NEC jurisdiction does not have 220.57. Nameplate plus 125% continuous treatment is the older shape. Confirm the edition. This table is not a shopping list and not a stamp.

Spaces versus amps — a 200 A panel can be full

Two shortages fail independently. This page is amps: leftover versus one continuous 240 V load. A dedicated 240 V breaker usually wants two adjacent spaces. Count those on the panel space checker. Spare amps with no spaces is still a project. Spare spaces with no leftover amps is a different project. Neither tool opens the panel.

The same LBNL / National Renewable Energy Laboratory paper estimated that 22 percent of all panels, and 20 percent of 200 A panels, have zero breaker spaces remaining. Homes with larger panels generally have more available space, but “at least 20 percent of panels of all sizes have no available breaker space.” An energy management system addresses current. It does not create a slot. Circuit sharing — a device that lets two 240 V loads occupy one branch, never both at full current — is a spaces-and-circuit class, not a whole-service class. Tandems already in the panel plus two empty slots is a subpanel conversation, not another tandem. A double-tapped breaker is a defect, not a spare.

LBNL’s training data were concentrated in California and Minnesota; the 22 percent is a modelled estimate applied to ResStock, not a walk-through of your garage. Treat it as the reason you count spaces separately from leftover amps, not as a diagnosis of this house. The panel-space tool will also ask whether tandems are already present and whether any breaker has two conductors under one screw. Yes on the double-tap is a stop, not a planning input.

Permit and inspection are local rules, not a national checkbox

Los Angeles — express permit, two inspectors possible

The Los Angeles Department of Water and Power’s charger-installation page, retrieved 5 September 2026, is explicit that Level 2 is 240 V, 20–40 A, on a dedicated circuit, and that a service-panel upgrade may be needed before the charger is installed. LADWP and the City of Los Angeles Department of Building and Safety have teamed up on instant online EV home-charger permitting. LADBS Express Permits — permits that do not require plan review — include electric vehicle chargers. Once the charger is installed, LADBS inspection requests “follow an expedited process and can typically be scheduled for the next business day.”

LADWP inspects only if a new service or panel upgrade was done to serve the charger. The same Electric Service Representative who did the preliminary assessment then inspects. LADWP asks customers to contact an ESR at least two weeks before installing a home charging system, because the utility assesses capacity up to the meter — transformer, lines to the house, meter options — while the electrical contractor examines the wiring past the meter. Two offices, two questions. This form answers neither of them.

Seattle — electrical permit for every charger

Seattle Department of Construction and Inspections Tip 132, “Installation of Electric Vehicle (EV) Charger for Single-Family and Multifamily Homes,” updated 25 July 2022 and retrieved 5 September 2026, states: “Electrical permits are required for all electric vehicle charger installations.” A Level II charger (the tip sheet’s own parenthetical: 240 V, 40 A continuous load) on a single-family residence requires no plan review and may be obtained online. Level II and III chargers may require plan review if fed by services or feeders rated 400 A or more.

If the electrician determines the electric service is not adequate, the tip sheet requires the owner to contact Seattle City Light before starting the project, complete an electrical service application package, and have new or upgraded services inspected by both an SDCI electrical inspector and an SCL Electric Service Representative. The person installing the charger needs to obtain the permits. The tip sheet notes that a single-family homeowner may perform the installation and obtain the permit, and it recommends a state licensed and bonded electrical contractor. This page still will not walk you through live work. A city that will issue a homeowner permit is not a walkthrough, and it is not HyreElectrical’s job.

San Francisco as a third local contrast, then the rule that does not travel

San Francisco Building Code section 106A.1.16, retrieved 5 September 2026, requires an electrical permit obtained by a California state licensed Electrical Contractor to install EVSE. The exception is a residential plug-in charger utilizing a previously approved receptacle outlet. Inspections by the Electrical Division are required. A fuller application can demand a load-calculation form, a panel schedule, a line diagram, and calculations signed by a California registered electrical engineer or the licensed contractor responsible for the design.

Los Angeles streamlines the charger itself into an express permit and an expedited inspection, and brings the utility in only when the service changes. Seattle requires an electrical permit for every charger, skips plan review on a typical single-family Level 2, and brings Seattle City Light in when the service is the constraint. San Francisco requires a licensed electrical contractor to pull the permit, exempts a plug-in on an already-approved receptacle, and can demand a stamped load calculation. Those three sentences do not generalise. A rebate does not size the circuit. AFDC’s home-charging page records that installations must comply with local codes, that permits may be required, and that in many areas a site plan must be submitted before installation. It names San Jose and Seattle’s tip sheets as city examples. That is the federal data centre pointing at city paper, not a 50-state permit table.

How to use this page — and when to stop using it

  1. 1
    Do not open the panel

    Read the service rating from a document, a closed-door sticker, or a figure an electrician already wrote down. A live interior is licensed work. HyreElectrical does not open panels.

  2. 2
    Get a house-shaped demand, not a guess

    Run the load calculator or use a figure an electrician already calculated. Typing 0 A existing demand makes spare equal the service rating; the engine will refuse that reading rather than announce 200 A of leftover.

  3. 3
    Decide whether Level 2 is even the job

    The selector is miles and hours. Short commutes with a long night on a dedicated 120 V circuit often fit Level 1. AFDC notes that some homes lack capacity for Level 2 and that an electrician determines that.

  4. 4
    Type one EVSE current, then the EMS prompt only if a listed system is actually in play

    Default 32 A is the common 40 A-class residential Level 2, matching AFDC’s “up to 30 A, dedicated 40 A circuit” note. Mark EMS yes only when a listed energy management system will limit the EVSE. An electrician confirms listing (750.30 in the 2023 model), fail-safe, setpoint and the adopted edition.

  5. 5
    Count spaces as a separate failure

    Two adjacent slots for a two-pole breaker. Run the panel space checker. A 200 A panel can be full. LBNL’s 22 percent with zero spaces is why this step exists.

  6. 6
    Ask the department that will inspect, not this page, about the permit

    Los Angeles, Seattle and San Francisco do not agree with each other. Your city is a fourth rule. This output is not a permit package.

  7. 7
    Do not land conductors

    A 240 V branch circuit is licensed work in most jurisdictions. This page will not walk you through live work. HyreElectrical does not perform electrical work, sell chargers, or stamp load calculations.

What a “yes” on leftover still is not

  • Not a stamped load calculation

    Diversity the electrician will apply, a heat pump you have not typed, aluminium branch wiring, and the adopted edition all sit outside this arithmetic. A positive leftover is a reason to have that conversation.

  • Not a spaces verdict

    Amps and slots fail independently. Count two-pole spaces on the panel-space tool. Do not take the cover off to fill it in.

  • Not a Level 1 versus Level 2 decision

    Miles and hours live on the selector. Leftover amps do not tell you whether overnight 120 V covers the commute.

  • Not an electrification plan

    Heat pump plus dryer plus EVSE is the electrification checker. Passing this page with a 32 A charger does not mean those three fit together.

  • Not a permit, a price, or a SKU

    Los Angeles express permits, Seattle’s online Level 2 permit, and San Francisco’s licensed-contractor rule are local. We do not print a national installation average. This form will not name a wall unit.

  • Not a reason to mark EMS yes because the brochure said “smart”

    625.42(A) is a listed energy management system complying with 750.30 in the 2023 model. Fail-safe to full nameplate is the opposite of the point. An electrician shows the setpoint.

  • Not DIY

    Do not open the panel. Do not share a dryer circuit from this page. Do not land conductors. HyreElectrical does not perform electrical work.

HyreElectrical does not perform electrical work

HyreElectrical does not install EV chargers, upgrade panels, commission energy management systems, sell wall units, or stamp load calculations. Matching is still being built. The enquiry form is not a booking. Confirm a contractor against the licence lookup. Authorship on this page is organisational: the HyreElectrical Research Desk, not a named persona.

The contractor roster behind this site is concentrated in five verified states and is 74 percent Florida. That concentration is not a national capacity finding, and it is not an input to this arithmetic. The AFDC registration file and the EIA 2024 light-duty snapshot are national context. Your spare amps are local. The leftover still has to be calculated for this house.

How this calculator works

HyreElectrical Research Desk built this checker so a 32 A or 48 A Level 2 circuit is tested against leftover amps, with NEC 625.42 energy management shown when leftover is short. It is not a restamp of the optional calculation in 220.82, it is not 2023 220.57’s 7,200 VA floor, and it is not a heat-pump-plus-dryer-plus-EV stack. The arithmetic is:

EVSE demand = EVSE amps × 1.25     (continuous load, 625.41 / 625.42 shape)
spare        = existing service − existing calculated demand

if spare ≥ EVSE demand:
    headroom on these figures
if spare < EVSE demand and EMS = yes:
    NEC 625.42 energy management may size the EVSE to available
    capacity instead of a service upgrade — an electrician confirms
if spare < EVSE demand and EMS = no:
    service or load-management conversation

On the default 32 A EVSE, demand is 40 A. On 48 A, demand is 60 A. On 16 A, demand is 20 A — which is how an EMS derate, or a 625.42(B) locked-down setting, can fit a 100 A service that a 32 A unit will not. The engine will not treat a blank demand box as “I do not know, assume the house draws nothing.” Demand of 0 A with a 200 A service is the usual way this arithmetic misleads, so the talk line sends you back to the load calculator rather than announcing 200 A of spare.

2023 220.57 is deliberately not in the formula. That section, new in the 2023 model, counts EVSE at the larger of 7,200 VA or nameplate in a standard calculation. This page is a leftover-amps check against one current you picked. An electrician applying 220.57 in a 2023-NEC jurisdiction may count more than this form does on a 16 A unit. A 2017-NEC or 2020-NEC jurisdiction does not have 220.57 at all. Confirm the edition. Do not attach this page to a permit application.

EVSE current on this form, demand at 125%, and the breaker class the circuit estimator would name. Not a shopping list.
EVSE currentDemand at 125%Circuit class (same 125%)
16 A20 A20 A class
32 A (default)40 A40 A class
40 A50 A50 A class
48 A60 A60 A class

AFDC’s home-charging page is why the question exists: most drivers charge overnight at home, and some houses do not have Level 2 capacity. AFDC’s Level 2 note — most residential units at up to 30 A, dedicated 40 A circuit under Article 625 — is why 32 A is the default here. Registration counts (California about 1.26 million all-electric light-duty vehicles, Florida about 255,000, as of 31 December 2023) explain the volume of the query. None of those files is a load calculation for your service.

What each input means

Inputs on this tool, in the order they appear on the form.
InputWhat it is actually asking
Existing service The ampere rating of the service, commonly 60, 100, 150 or 200. It is the size of the service, not the leftover. 0 until you know it. LBNL estimated 31% of U.S. single-family homes at 100 A or smaller and 58% at 200 A or more; those shares explain why 100 and 200 are the two numbers people type, not which leftover you have.
Existing calculated demand A house-shaped ampere figure from the load calculator, or from an electrician. Not a clamp reading you took on a Saturday, and not 0 because the dead front looks roomy. 0 on this form means “not typed,” and the engine will not invent spare from that.
Desired EVSE current Amps at 240 V the charger will draw, then ×1.25. Default 32 A (40 A demand). 16 / 32 / 40 / 48. This is charger current, not the breaker handle. Dropping to 16 A is the derate lever when leftover is short of 40 A. The circuit estimator is where current becomes a breaker class. The selector is where miles and hours say whether the slower charge still covers the day.
Load management available No is the default and the honest answer until a listed EMS is actually part of the design. Yes means 625.42(A) is in play: the maximum EVSE load on the service and feeder is the maximum load the EMS permits. An electrician confirms listing (750.30 in the 2023 model), fail-safe behaviour, and whether the adopted edition matches the 2023 model this sentence describes. A 2020-NEC state already has the automatic-load-management sentence; it does not have 220.70. Marking yes because a brochure said “smart” is how people skip the upgrade conversation they still need.

Worked examples

Including one where the naive answer misleads, which is the example most calculators leave out.

A 100 A house and a 32 A EVSE — the common miss

Service 100 A, demand 78 A, EVSE 32 A, EMS no. Spare = 22 A. EVSE demand = 40 A. Talk: spare of 22.0 A is short of 40.0 A EVSE demand. That is a service or load-management conversation, not a shopping list. Mark EMS yes and the same shortfall becomes the 625.42 sentence: energy management may size the EVSE to available capacity instead of a service upgrade, and an electrician confirms. This is the example LBNL’s 31% at 100 A or smaller makes common. It is not a 100 A verdict for every house. Type the calculated demand; a 100 A service with 50 A of existing demand has 50 A spare, which does cover 40 A on these figures.

EMS derate to 16 A on that same 100 A house

Same service 100 A, same demand 78 A, now EVSE 16 A, EMS no. Spare is still 22 A. EVSE demand = 20 A. Talk: 2.0 A still spare on these figures after a 16 A EVSE at 125%. Headroom on these figures — illustrative, not a stamp. Two amperes is knife-edge. It is also a slower charge: 16 A at 240 V is 3.84 kW, against 7.68 kW at 32 A. The selector is where overnight miles say whether that still covers the day. NREL’s laboratory test dropped a Wallbox from 28 A to 16 A while a dryer ran and recovered in about a minute; that is the mechanism, on one vendor system, with a vehicle that could accept only 28 A. This page will not pick among a 16 A derate, a listed EMS that holds 32 A under a setpoint, and a service change.

A 200 A house already near capacity

Service 200 A, existing demand 175 A, EVSE 32 A, EMS no. Spare = 25 A. EVSE demand = 40 A. Talk: spare of 25.0 A is short of 40.0 A EVSE demand. That is a service or load-management conversation, not a shopping list. The sticker says 200 A. The leftover is 25 A. A 48 A unit would be 60 A of demand against the same 25 A. LBNL’s 58% at 200 A or more is why this sentence surprises people: they bought the large panel and still do not have 40 A of leftover. Spaces can fail independently — 20% of 200 A panels in that paper had zero breaker spaces remaining.

A 200 A service with a real demand figure and a 32 A charger — the thin pass

Service 200 A, existing demand 155 A from the load calculator, EVSE 32 A, EMS no. Spare = 45 A. EVSE demand = 40 A. Talk: 5.0 A still spare on these figures after a 32 A EVSE at 125%. Headroom on these figures — illustrative, not a stamp. Five amperes is not a design margin you take to the permit counter. It is a reason to have an electrician run the adopted-code calculation, and to count two spaces. It is not a reason to order a 48 A wall unit on the same leftover.

The one where “the panel says 200 A” misleads

Service typed as 200 because that is the number on the door, demand left at 0, EVSE 48 A. The naive answer is 200 A of spare against 60 A of charger demand, plenty of room, order the 48 A unit. The engine refuses that reading: demand of 0 A makes spare equal the service rating, which is the usual way this arithmetic misleads, and it sends you to the load calculator. Existing range, HVAC, water heater and general load already occupy most of a 100 A or 200 A service. The sticker is the box. Spare is the leftover after the house. Type the leftover.

What changes the result

EVSE current is the lever that most often changes the talk line, because of the 125% multiplier. Dropping from 48 A (60 A demand) to 32 A (40 A) gives back 20 A of demand. Dropping from 32 A to 16 A gives back another 20 A. That is sometimes the difference between a service conversation and leftover on a tight 100 A service — the 100 A / 78 A house is short at 32 A and passes, knife-edge, at 16 A. It is also a slower charge. Miles and hours belong on the selector, not on this form.

Existing demand moves spare one-for-one. A load-calculator result that is 10 A higher is 10 A less leftover. Guessing demand, or typing the service rating into the demand box, is how a short service looks like headroom. On the 200 A / 175 A example, ten amperes of demand you forgot — a spa, a second HVAC, a tankless water heater — is the difference between a 25 A miss and a 15 A miss, still a miss, and not a reason to shop a 48 A unit.

The EMS prompt changes the sentence only when spare is already short. It does not create amps. “Yes” on a house with no listed energy management system is how people skip the upgrade conversation they still need. Mark yes only when a listed EMS will actually limit the EVSE, and expect the electrician to show the setpoint against 750.30 and the adopted edition.

A spare figure that already goes negative — existing demand above the service — is a service or load-management conversation before the charger is in the picture. Adding 40 A of EVSE demand on top of an already-over service is not a planning choice this page will bless. Spaces do not appear in the arithmetic and still change the job: two leftover amps with zero slots is a panel or subpanel conversation. Run the panel-space tool. Do not open a live interior to fill it in.

Local considerations

The National Electrical Code is a model code. ESFI’s June 2026 adoption map and IAEI’s statewide table are the reminder that states and cities lag, and that the enforceable text is the edition the jurisdiction adopted, plus any local amendments. 625.42 energy management as described here is the 2023 model. A 2020 edition still recognised automatic load management for EVSE; the (A) EMS / (B) adjustable-settings split, 220.57’s 7,200 VA floor, 220.70’s whole-service setpoint, and the 625.40 exception for multiple EVSEs, are 2023 language. Florida, on IAEI’s table checked 5 September 2026, is on the 2020 NEC. California’s 2025 Electrical Code is based on the 2023 NEC and took effect 1 January 2026. This page does not declare which edition your building department uses.

Permit and inspection rules are a second local layer. The Los Angeles and Seattle sections above are two named city examples, retrieved 5 September 2026; San Francisco’s licensed-contractor rule is a third contrast. Those cities do not agree. Yours is a fourth rule. Utility rules for a service change, a meter-base replacement, or a residential charging rate are local and separate from the NEC article. A rebate does not size the circuit.

HyreElectrical’s own contractor roster is concentrated in five verified states and is 74% Florida. That concentration is not a national capacity finding, and it is not an input to this arithmetic. The AFDC registration file and the EIA 2024 light-duty snapshot are national context. Your spare amps are local.

When not to use this

Do not use this as a stamped load calculation, a permit, a price, or a reason to open the panel. It cannot see diversity the electrician will apply, a heat pump you have not typed into the load calculator, aluminium branch wiring, a Federal Pacific or Zinsco interior, or a panel with no spaces. It does not apply 2023 220.57’s 7,200 VA floor. It does not restamp 220.82.

Do not type the service rating as existing demand, and do not treat a leftover of 5 A as a design margin. Do not mark EMS yes because a charger brochure said “smart.” Do not treat a 16 A derate as a free lunch without checking miles and hours on the selector.

Do not use it to share a dryer circuit, to install a 240 V receptacle, or to land conductors. Live work is not DIY. A 240 V branch circuit is licensed work in most jurisdictions. A city that will issue a homeowner permit is still not a walkthrough on this page.

Do not use it for workplace, multifamily common-area, or DC fast charging. Those are different power levels and different rules. Do not use public station counts, or the number of EVs registered in your state, as a substitute for leftover amps. Do not use it as a substitute for the load calculator, the electrification checker, or the Level 1 versus Level 2 selector.

HyreElectrical does not perform electrical work, sell chargers, or stamp calculations. Matching is still being built. The enquiry form is not a booking.

Related on this site

Questions this calculator answers

Can my panel handle an EV charger?
Only against leftover capacity you actually have, not against the ampere rating printed on the dead front. This tool subtracts existing calculated demand from existing service, then asks whether a 16, 32, 40 or 48 A Level 2 circuit still fits after the 125% continuous-load adder. “The panel says 200 A” is the rating of the box. Spare is what is left after the house. A 200 A service with 175 A of existing demand has 25 A spare, which does not cover a 32 A charger at 40 A demand.
Do I need a panel upgrade for an EV charger?
Not automatically. If spare amps cover EVSE current × 1.25, these figures show headroom. If they do not, a service change is one conversation and energy management under NEC 625.42 is another. This page will not pick the job. A listed energy management system, where the adopted code allows it, may size the charger to available capacity instead of increasing the service. An electrician confirms which path the authority having jurisdiction will accept. A known-hazard-era interior, a full panel, or a utility that is already requiring a service change are reasons the upgrade remains the job.
What are EV charger panel requirements?
Two shortages fail independently: amps and spaces. This page is amps — leftover versus one continuous 240 V load. A dedicated 240 V breaker usually wants two spaces; count those on the panel space checker. The circuit estimator turns the same current into a breaker class. The EV charger installation guide is the job, not this arithmetic. LBNL estimated 22% of U.S. single-family panels have zero spare breaker spaces, including 20% of 200 A panels, which is why a 200 A box can still be full.
Why is the charger multiplied by 1.25?
Because EV charging is a continuous load in NEC Article 625. 2023 NEC 625.41 sizes overcurrent protection for feeders and branch circuits supplying EVSE at not less than 125% of the maximum load of the equipment. 625.42 says the same loads are continuous when the service and feeder are sized. A 32 A EVSE is therefore 40 A of demand on this form, not 32. Typing 32 and reading 32 is how a tight 100 A service looks like it has room it does not.
What does NEC 625.42 actually allow?
In the 2023 model code, 625.42 says EV charging loads are continuous and that the service and feeder are sized to the product ratings unless the overall rating of the installation is limited through controls under 625.42(A) or (B). (A) is an energy management system complying with 750.30: the maximum EVSE load on the service and feeder is the maximum load the EMS permits. (B) is EVSE with restricted-access adjustable settings. This tool only models (A) as a yes/no. It does not commission an EMS, pick a setpoint, or declare your city has adopted 2023. The 2017 and 2020 editions already recognised automatic load management; they did not split (A)/(B) or add 220.70.
What is NEC 220.57, and does this tool use it?
2023 NEC 220.57 is a new standard-calculation rule: EVSE load is the larger of 7,200 VA or the nameplate. The floor is a 30 A, 240 V circuit. This tool does not apply that floor. It tests leftover amps against the current you typed × 1.25. On a 16 A charger the difference is real: this form counts 20 A of demand, while a 2023 standard calculation would count 7,200 VA. On the 32 A default the nameplate is already above 7,200 VA. 220.57 does not exist in the 2017 or 2020 editions. The load calculator on this site is shaped like 220.82, which is a different article again.
How is this different from the load calculator and the electrification tool?
The load calculator is a whole-house demand estimate in the shape of NEC 220.82. The electrification checker asks whether a heat pump, an electric dryer and an EVSE fit in spare you already typed, together. This page asks only whether one Level 2 circuit fits, and it is the page that surfaces 625.42 when the answer is no. Use them in that order. Do not run this as a substitute for 220.82.
How is this different from the Level 1 versus Level 2 selector?
The selector uses daily miles, hours on the plug, and whether 240 V already exists at the parking spot. It will not size leftover amps. This page assumes you are already asking about a Level 2 circuit. AFDC notes that many drivers meet daily range on Level 1 overnight. If that is still an open question, run the selector first.
Is a 100 A service enough for a Level 2 charger?
Sometimes, if existing demand is low enough that 20 A (16 A EVSE), 40 A (32 A) or 60 A (48 A) still fits after 125%. Often not, once the house already has electric range, dryer, water heater or HVAC. Type the calculated demand. A 100 A label with 78 A of existing demand has 22 A spare, which does not cover a 32 A charger at 40 A demand. That is a load-management or service conversation, not a 100 A verdict. LBNL estimated 31% of U.S. single-family homes at 100 A or smaller; that is why the question is common, not proof about this house.
What if I mark EMS yes and derate the charger to 16 A?
Marking EMS yes does not change the amp arithmetic; it changes the sentence when leftover is already short. Derating the desired EVSE current to 16 A does change the arithmetic: 16 × 1.25 = 20 A of demand. On a 100 A service with 78 A of existing demand, spare is 22 A, so 20 A fits on these figures with 2 A leftover. That is knife-edge, slower, and still illustrative. NREL’s laboratory test dropped a charger from 28 A to 16 A while a dryer ran, then recovered in about a minute — evidence the mechanism exists, not a setpoint for your garage.
Is a 40 A circuit the same as a 40 A charger?
No, and mixing them is the usual shopping error. A 32 A EVSE on a 40 A class circuit is the common residential Level 2. A 40 A EVSE is 50 A of demand at 125%. A 48 A EVSE is a 60 A class. The Department of Energy’s Alternative Fuels Data Center notes that most residential Level 2 units operate at up to 30 A and want a dedicated 40 A circuit under Article 625. This form uses 32 A as the default 40 A-class current, not as a 40 A charger.
Do I need a permit to install a home EV charger?
Almost always for a new 240 V circuit, and the rule is local. Los Angeles issues an LADBS Express Permit for EV chargers (no plan review) and typically inspects the next business day; LADWP inspects only if the service or panel changed. Seattle SDCI Tip 132 requires an electrical permit for all EV charger installations; a single-family Level 2 (the tip sheet’s 40 A continuous-load example) needs no plan review and can be obtained online. San Francisco requires a California licensed electrical contractor to pull the permit, with an exception for a plug-in on a previously approved receptacle. This output is not an application.
Can I install the charger myself?
A 240 V branch circuit is licensed work in most jurisdictions. Seattle’s 2022 tip sheet notes that a single-family homeowner may obtain the permit and perform the installation, and it still recommends a licensed contractor. This page will not walk you through live work, landing conductors, or pulling a permit. A burning smell, sparking, or a breaker that will not hold is a stop condition, not charger planning — de-energise what you can from a known-good switch and call a licensed electrician. Do not keep resetting, and do not open the panel to “check.”
Does a national EV-registration number prove my panel has room?
No. AFDC’s downloadable state registration file is why this question is common — California had about 1.26 million all-electric light-duty registrations and Florida about 255,000 as of 31 December 2023 — not evidence that a given service can carry 40 A or 60 A of continuous charging. Public station counts do not size a garage circuit. Your leftover amps do.
Does HyreElectrical install EV chargers or upgrade panels?
No. HyreElectrical does not perform electrical work, sell chargers, or stamp load calculations. Matching is still being built. The enquiry form is not a booking. Confirm a contractor against the licence lookup.

Sources and methodology

Figures dated 5 September 2026. Last reviewed .

  • NFPA 70, National Electrical Code, Articles 220 and 625 (National Fire Protection Association, retrieved 2026-09-05. Cited as the model code. 625.41 (overcurrent at 125% of EVSE load), 625.42 (continuous loads; EMS or adjustable settings may limit service and feeder sizing) and 220.57 (2023: larger of 7,200 VA or nameplate) live in the adopted edition. This page is a shape, not a reprint. Confirm the edition your jurisdiction adopted.)
  • Leviton Captain Code 2023 — 220.53 and 220.57 EVSE load (Leviton (NFPA-permitted reprint), retrieved 2026-09-05. Reprint of 2023 220.57: EVSE load calculated at 7,200 W (VA) or nameplate, whichever is larger. Floor based on a 30 A, 240 V single-phase circuit. EVSE excluded from 220.53’s 75% appliance demand factor. Material from NFPA 70, 2023 edition, copyright 2022 NFPA. This tool does not restamp 220.57.)
  • Leviton Captain Code 2023 — 625.40, 625.42(A)(B), 625.43 (Leviton (NFPA-permitted reprint), retrieved 2026-09-05. Reprint of 2023 625.42: charging loads continuous; service and feeder sized to product ratings unless limited by (A) EMS in accordance with 750.30 or (B) restricted-access adjustable settings. 625.40 exception permits multiple EVSEs on one branch when (A) or (B) applies.)
  • Five ways the 2023 NEC is impacting the electrified home (EC&M (Thomas Domitrovich), retrieved 2026-09-05. Cited for 2023 220.57 (7,200 W or nameplate), the 625.42(A)/(B) exception, and the 625.40 change that individual-branch-circuit treatment now applies to EVSE greater than 16 A or 120 V unless the exception is used. Domitrovich sits on NEC Code-Making Panel 2. Not a substitute for the adopted text.)
  • Code quiz: sizing overcurrent protective devices supplying EVSE (EC&M (John Lupacchino), retrieved 2026-09-05. Cited for 2023 NEC 625.41: overcurrent devices for feeders or branch circuits supplying EVSE are sized at 125% of the maximum load of the equipment. That is the 1.25 on this form. Lupacchino is an alternate on Code-Making Panel 3.)
  • ElectricalLicenseRenewal — 2017 and 2020 625.42 (ElectricalLicenseRenewal, retrieved 2026-09-05. Quotation of 2017 625.42 (automatic load management system sets the maximum equipment load on a service and feeder) and 2020 625.42 (same sentence plus adjustable settings on fixed-in-place equipment). Used for the edition-difference table.)
  • Village of Tinley Park — EVCS Guide, 2017 NEC (Village of Tinley Park, Illinois, retrieved 2026-09-05. Municipal reprint of 2017 NEC 625.42, including the automatic load management system sentence, used to confirm the 2017 wording independently of the continuing-education quotation.)
  • ElectricalLicenseRenewal — 2023 220.70 and 2026 120.7 (ElectricalLicenseRenewal, retrieved 2026-09-05. Side-by-side of 2023 220.70 (EMS setpoint permitted in feeder or service load calculations; setpoint treated as continuous) and 2026 120.7 (PCS; control setting by qualified persons; not more than 80% of the monitored OCPD). Page dated 15 January 2026. The 80% cap is a 2026 model provision, not a 2023 rule.)
  • Charging electric vehicles at home (U.S. Department of Energy, Alternative Fuels Data Center, retrieved 2026-09-05. Cited for home charging as the usual pattern; that some homes lack capacity for Level 2 and an electrician determines that; that installations must comply with local codes and may require permits; and for naming San Jose and Seattle tip sheets as city examples. Not used as panel-capacity proof for any address.)
  • Electric vehicle charging stations — Level 2 equipment (U.S. Department of Energy, Alternative Fuels Data Center, retrieved 2026-09-05. Cited for the AFDC note that most residential Level 2 chargers operate at up to 30 A and require a dedicated 40 A circuit to comply with NEC Article 625. This form’s 32 A default is that 40 A-class current, not a 40 A charger.)
  • Electric vehicle registrations by state (as of 31 December 2023) (U.S. Department of Energy, Alternative Fuels Data Center, retrieved 2026-09-05. Downloadable. National Renewable Energy Laboratory with Experian. All-electric light-duty counts: California about 1,256,646; Florida about 254,878; California about 35% of the nationwide all-electric count. Cited as adoption context, not as a load calculation.)
  • Alternative Fueling Station Locator (U.S. Department of Energy, Alternative Fuels Data Center, retrieved 2026-09-05. Public charging locations exist in every state. Cited to separate public infrastructure from the home-panel question this tool answers. A station count does not size a garage circuit.)
  • Table N4. Electric light-duty vehicles overview, 2024 (U.S. Energy Information Administration, State Energy Data System, retrieved 2026-09-05. Year-end 2024: 5,816.9 thousand U.S. electric light-duty vehicles (4,351.3 BEV + 1,465.6 PHEV), 2.2% of 267,111.1 thousand light-duty vehicles. State figures draw on AFDC. Later snapshot than AFDC 10962, and it includes plug-in hybrids. Still not panel-capacity proof.)
  • National Electrical Code adoption (Electrical Safety Foundation International, retrieved 2026-09-05. The NEC is a model code, commonly mandated by state or local law, revised every three years. Adoption lags. Map and page updated June 2026. 625.42 language on this page is the 2023 model, not a declaration of your city’s edition. Also cited for the standing rule that service and panel work are not DIY.)
  • IAEI — NEC code adoption by state (International Association of Electrical Inspectors, retrieved 2026-09-05. Statewide adopted edition and effective date. Used for edition-lag examples: Florida 2020 (31 December 2023); California 2023 via the 2025 California Electrical Code (1 January 2026); Colorado 2026 (1 August 2026); Wyoming 2026 (1 July 2026); Tennessee 2017; District of Columbia 2014. Local amendments and city adoptions can differ.)
  • Charger installation — permits and inspections (Los Angeles Department of Water and Power, retrieved 2026-09-05. Level 2 described as 240 V, 20–40 A, dedicated circuit. LADBS Express Permit covers EV chargers (no plan review). LADBS inspection typically next business day. LADWP inspects only if a new service or panel upgrade served the charger. Contact an Electric Service Representative at least two weeks before installing.)
  • SDCI Tip 132 — Installation of EV charger for single-family and multifamily homes (Seattle Department of Construction and Inspections, retrieved 2026-09-05. Updated 25 July 2022. Electrical permits required for all EV charger installations. Single-family Level II (tip sheet: 240 V, 40 A continuous load) requires no plan review and may be obtained online. Contact Seattle City Light before starting if the service is not adequate. New or upgraded services inspected by both SDCI and an SCL Electric Service Representative.)
  • San Francisco Building Code 106A.1.16 — EV supply equipment, permit and fee (City and County of San Francisco, retrieved 2026-09-05. Electrical permit obtained by a California state licensed Electrical Contractor required to install EVSE, with an exception for a residential plug-in using a previously approved receptacle. Electrical Division inspections required. Application may include a load-calculation form, panel schedule and line diagram.)
  • Murphy et al., Characterizing electrical panel capacity, breaker space, and loads in U.S. single-family homes (Journal of Building Engineering 120 (2026) 115576 / LBNL and National Renewable Energy Laboratory, retrieved 2026-09-05. Estimated 55% of U.S. single-family homes at 200 A and 3% above (58% at 200 A or more); 29% at 100 A and 2% below (31% at 100 A or smaller); 22% of all panels and 20% of 200 A panels with zero spare breaker spaces. Modelled estimates on ResStock; training data concentrated in California and Minnesota.)
  • NREL/TP-5500-95492 — Low-Power, Load-Balancing Whole Home Electrification Solution (National Renewable Energy Laboratory, retrieved 2026-09-05. CRADA final report, August 2025. Panel downsized to 70 A in software against a 150 A actual limit; Wallbox charger throttled 28 A to 6 A; peak 64 A to 42 A (35%); dryer event to 16 A with about one minute recovery; 15–23 s latency. One vendor system, one vehicle limited to 28 A. Cited for the EMS mechanism, not as a product finding.)

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