How do I know if my electrical service is too small?

By running the load calculation, not by adding up nameplates. NEC 220.82 counts the first 10 kVA of general load at 100% and the rest at 40%, so the sum printed on your appliances is always far larger than the figure a service is sized against. The load calculator follows that method.

My panel is full. Do I need a service upgrade?

Not necessarily: physical space and electrical capacity are separate limits. If the panel is out of room but the calculation passes, a subpanel is the usual answer and the utility is not involved. If the calculation fails, that is a capacity question, and even then a managed load may change the result.

Does adding an EV charger mean upgrading the service?

Often not. NEC 625.42 treats charging as a continuous load, but 625.42(A) lets a listed energy management system set the charger load used in the service calculation. A charger set to a lower current, or managed to yield to other loads, counts as a smaller load. Ask whether that was considered.

How common are electrical fires?

The CPSC estimates an annual average of 17,100 residential fires from electrical distribution equipment in 2019 to 2021: 4.9% of residential fires, but 6.0% of the deaths (150 a year) and 6.1% of injuries (680). That pattern fits fires that start in concealed wiring, out of sight, at night.

Are power outages getting worse?

Major events are. The EIA reports an average of 11 hours of interruptions per customer in 2024, nearly twice the prior decade's average, with major events causing nearly nine of those hours against about four a year in 2014 to 2023. Routine interruptions still average about two hours a year.

Why will you not tell me what a panel upgrade costs?

Because we hold no dataset of bids, and the averages in circulation come from lead-generation sites with unpublished methods. Labor rates, the code edition, permit fees, utility involvement and the existing wiring move the figure too far for a national number. Type your written estimate into the project cost tool.

Is there still a federal tax credit for an electrical panel?

Not for new work. The IRS describes the 25C credit as ending for property placed in service after 31 December 2025. While it ran, panelboards of 200 amps or more qualified, capped at $600. If a quote leans on the credit, ask for the current IRS page. We are not tax advisers.

Do any of these tools replace an electrician?

None of them. They are here so you arrive at the conversation knowing which questions to ask and which arithmetic is being done. Nothing here is a stamped load calculation, a design, a permit document or an inspection, and nothing here instructs anyone to work on live equipment.

HyreElectrical tools

Electrical tools, with the reasoning on the page

Sixteen working tools for the questions homeowners actually arrive with. Each shows its arithmetic, names its sources and gives the answer on screen — none asks for an email first. HyreElectrical performs no electrical work and takes no referral fee, which is why these are free to tell you that nothing needs to change.

Nameplates ≠ load the mistake behind most unnecessary upgrades NEC 220.82: “The general calculated load shall be not less than 100 percent of the first 10 kVA plus 40 percent of the remainder of the following loads”. Summing appliance nameplates instead gives a far bigger number, and a bigger quote.

If something is hot, smells of burning, sparks, or trips a breaker that will not reset, stop here and get an electrician out — that is not a calculator question. Otherwise, most visitors are asking one of two things.

Can this house take one more thing? Start with the load calculator for capacity and the panel space checker for physical room, because those two shortages fail independently and have very differently priced answers. Am I being sold the right job?

NEC 625.42(A) lets a managed charging load be the figure used in the service calculation. NEC 230.79(C) sets only 100 A as the minimum service for a one-family dwelling.

There is no honest national average price for a panel upgrade, so type your own bid into the project cost tool rather than a figure from a roundup.

Every tool, by the question you arrived with

Something is wrong, or the power is out

Start here if you are worried rather than planning. The safety check is written to be read in a hurry, and it is allowed to tell you to stop and call somebody.

Electrical safety checkHard stop on burning, sparking, heat, or a breaker that will not hold. Not a clean bill.Open the tool

Outage costHours times your rate, plus food and work-from-home you type. No national outage figure.Open the tool

Generator sizingRunning watts plus a starting adder you type. Not a SKU. Transfer switch is licensed work.Open the tool

Can this house take one more thing?

The most common real question, and the one where a homeowner is most often sold the wrong job. Capacity and physical room are separate shortages with very differently priced answers.

Electrical load / service-size calculatorNEC 220.82-shaped demand, labeled as not a stamped load calc.Open the tool

Panel space checkerSpaces, tandems, double-taps. A full 200 A panel is still full.Open the tool

Electrification readinessNew 240 V demand against spare amps you typed. Not a restamp of NEC 220.82.Open the tool

Charging an electric car at home

Whether you need Level 2 at all, whether the panel can carry it, and what makes the charging circuit the expensive part.

EV charger selectorLevel 1 vs Level 2 from miles and hours. Not a charger model. 240 V work is licensed.Open the tool

Can the panel take an EV charger?Spare vs a 40 A or 48 A Level 2 circuit at 125%. Load management when an upgrade is not required.Open the tool

EV charger circuit estimatorContinuous-load 125% and a distance flag. Not a charger SKU and not a price.Open the tool

Sizing a specific circuit

Once the house can take it, these size the individual job: the appliance circuit, the conductor, the run and the lighting.

Appliance circuit lookupFrom the nameplate, not a category table. Applies the 125% rule where it belongs.Open the tool

Wire size calculatorWith the NEC 240.4(D) small-conductor cap applied — the rule that overrides the table.Open the tool

Voltage drop calculatorDrop over a run, and the size that fixes it. 3% and 5% are informational notes, not requirements.Open the tool

Lighting circuit plannerCount times watts, 80% of a 15 A or 20 A circuit. Not a photometric plan.Open the tool

Checking the bid, the license and the code

We hold no price index, so these test whether a document and a person can be checked at all, which matters more than the headline number.

Electrical project costTyped bid lines plus contingency. No national panel-upgrade average.Open the tool

Check an electrician’s licenseRoutes to the official state board. Verified records in five states; 74% Florida — coverage is the first line.Open the tool

NEC edition lookupThere is no national answer and we will not print a map. Who to ask, and what to ask them.Open the tool

All sixteen, and the question each one actually answers

The third column is the useful one. Every tool here has a boundary, and knowing where it sits saves you asking a page something it cannot answer and believing the reply.

Tool	The question it answers	What it deliberately will not do
Electrical load calculator	Is my service actually too small, or does it only look that way when you add up the nameplates?	Produce a stamped load calculation. It runs the shape of NEC 220.82, which is a conversation-opener, not a permit document.
Panel space checker	Is there physically anywhere to put another breaker?	Tell you anything about capacity. A panel with room and no headroom will pass this page cheerfully, and that is the more dangerous of the two failures.
Electrification readiness	Which of these projects can this house absorb, and in what order?	Restate the Code’s optional calculation. It works against the spare capacity you type in, so it inherits whatever that figure is worth.
Can the panel take an EV charger?	Is there a spare circuit for a Level 2 charger, and what if there is not?	Assume a service upgrade is the answer. Load management is a real alternative and this page says so.
EV charger selector	Do I need Level 2 at all, given how far I actually drive?	Name a product. It compares charging rates against your own mileage, and for a great many drivers the honest answer is that Level 1 is enough.
EV charger circuit estimator	What circuit does this charger need, and what makes the run expensive?	Price the installation, or size a conductor. Distance is flagged as a design input, not computed.
Lighting circuit planner	How many circuits does this lighting want?	Design a lighting scheme. It counts load against circuit capacity; it has no opinion on how the room will look.
Generator sizing	What running load am I actually trying to carry in an outage?	Name a generator, or touch the transfer equipment question. That is licensed work and the most consequential part of the job.
Outage cost	What did that actually cost me, and does backup power pay for itself?	Supply a national figure for what an outage costs a household. There is not an honest one. The food, the work and the hotel are yours to type.
Electrical project cost	Do these two quotes describe the same job?	Publish an average panel-upgrade price. We hold no dataset of bids, and the figures that circulate come from lead-generation sites with unpublished methods.
Electrical safety check	Is this a call-someone symptom or a book-someone symptom?	Give you a clean bill of health. A page cannot see your wiring, and this one will never conclude that you are fine.
Appliance circuit lookup	What circuit does this appliance want, going by its own nameplate?	Read a category table. It works from the nameplate figures you type, and applies the 125% rule only where it belongs.
Wire size calculator	What conductor carries this load once NEC 240.4(D) is applied?	Derate for ambient temperature or conductor fill, or check run length. Both can force a larger conductor.
Voltage drop calculator	How much voltage is lost over this run, and what size fixes it?	Treat 3% and 5% as requirements. They are informational notes in the model code, not rules.
NEC edition lookup	Which edition of the electrical code applies to my job?	Print a national map. Adoption is state and local, so it tells you who to ask and what to ask them.
Check an electrician’s license	Where do I verify this person against the official record?	Rank contractors or recommend one. It routes you to the state board, and the board’s answer is the answer.

Stop reading and call someone if any of this is true

None of these is a calculator question. Every one of them is a reason to close the laptop, and they are listed first because a hub page is exactly where somebody in trouble lands.

You can smell burning, or hot plastic, near an outlet, a switch or the panel
Insulation and plastics smell before they fail visibly. This is not a symptom to observe for a few days, and no tool on this site will tell you otherwise.
An outlet, a switch plate, a cover or a breaker is warm or hot to touch
Heat at a connection means resistance where there should be none. That is the mechanism behind a large share of the fires in the estimates below, and it develops over weeks, not seconds.
You see or hear sparking, buzzing or crackling from any electrical device
Arcing. Turn off the circuit at the breaker if you can do so safely from the front of the panel, and get someone out.
A breaker will not stay set, or trips as soon as you reset it
A breaker doing its job repeatedly is telling you something is wrong on the circuit or with the breaker itself. Repeated resetting answers neither and removes your only protection.
Water has reached electrical equipment, or the panel is damp
Do not open, do not investigate, do not dry it out yourself. This is a utility-and-electrician situation.
Anyone has received a shock from an appliance, a tap or an outlet
Even a small one. It indicates a fault path that should not exist, and the next person to touch it may be less lucky.

Six things worth knowing before you open any of them

The findings these sixteen pages keep arriving at, gathered once. Each is sourced on the page it belongs to as well as here.

Real CPSC estimates rather than an illustration. Note where they point: concealed wiring and connections, not the panel everybody worries about.US Consumer Product Safety Commission, 2019–2021 Residential Fire Loss Estimates (May 2024), Table 4a.

1. The sum of your nameplates is not your load. NEC 220.82 permits a dwelling’s calculated load to be “The general calculated load shall be not less than 100 percent of the first 10 kVA plus 40 percent of the remainder of the following loads”.

A house is not sized for every appliance running at once, and "add it all up" is the arithmetic behind a great many unnecessary service upgrades.

2. Physical spaces and amperes are different shortages. A 200 A panel can be completely full while NEC 230.79(C) sets only 100 A as the minimum service for a one-family dwelling. Running out of room is usually the cheaper problem, and it is frequently sold as the expensive one.

3. A charging load can be managed rather than accommodated. NEC 625.42(A): “Where an EMS in accordance with 750.30 provides load management of EVSE, the maximum equipment load on a service and feeder shall be the maximum load permitted by the EMS.”

If a service upgrade is being quoted for a car charger, this is the sentence to ask about first.

4. Electrical fires are a small share of residential fires and a larger share of the deaths. CPSC: “An estimated annual average of 17,100 fires was attributable to electrical distribution equipment (e.g., installed wiring, lighting, etc.). This is 4.9 percent of the estimated annual average number of residential fires for this period.”

The same passage continues: “The annual average death estimate is 150 (6.0 percent of average annual estimated residential fire deaths); and the injury estimates averaged 680 (6.1 percent of the estimated annual average of residential fire injuries).”

That is 4.9 percent of the fires and 6.0 percent of the deaths. Our reading of why: they start in concealed places, at night.

5. Outages are getting longer. EIA: “U.S. electricity customers experienced an average of 11 hours of electricity interruptions in 2024” — nearly twice as many as the annual average experienced in the decade before.

And the shape matters: “Interruptions attributed to major events averaged nearly nine hours in 2024, compared with an average of nearly four hours per year in 2014 through 2023. Service interruptions that aren’t triggered by major events routinely average about two hours per year.” Routine reliability has not collapsed; big storms have got bigger.

6. GFCI and AFCI cover far more of a house than people think. NEC 210.8(A) reaches “All 125-volt through 250-volt receptacles installed in the locations specified in 210.8(A)(1) through (A)(11) and supplied by single-phase branch circuits rated 150 volts or less to ground shall have ground-fault circuit-interrupter protection for personnel.”

NEC 210.12(B) covers “All 120-volt, single-phase, 10-, 15-, and 20-ampere branch circuits supplying outlets or devices” across 14 named categories of room. A device that trips is not automatically a faulty device.

What these tools will and will not do

The standing promises, stated once here so each page does not have to repeat them.

The reasoning is on the page

Every tool states the arithmetic it runs and the source behind any constant. If you disagree with an assumption you can see it, and you can change the input.

Nothing asks for an email before showing a result. There is no lead form standing between a worried person and an answer.

They are free to tell you to do nothing

HyreElectrical does not perform, supervise or warrant electrical work, does not open panels, and does not pull permits. HyreElectrical holds no dataset of bids, invoices, inspections or jobs. No figure on this site is our own measurement of the market.

That is what allows these pages to conclude that your existing service is fine, that Level 1 charging is enough for your mileage, that the panel needs a subpanel rather than a service change, or that a generator will not pay for itself.

A calculator built by a company that sells the work cannot easily reach any of those conclusions.

No prices, and no national averages

There is no national average price for a panel upgrade, a service change, an EVSE circuit or a rewire on this site, because we hold no dataset of bids and the figures that circulate in roundups come from lead-generation sites with unpublished methods.

Where a page needs money in it, it asks you to type the figure from your own written estimate. An empty line is more honest than a borrowed average.

Code figures are model-code figures

Adoption and amendment of the National Electrical Code is local. A state or city may be on an older edition, may amend it, and may add rules of its own. Confirm the adopted edition and the amendments with the authority having jurisdiction before relying on any code figure here.

Every code citation on this site names the article and, where we have it, the edition of the text we quoted. Where we could not retrieve verbatim text, the page says so rather than paraphrasing into a quotation.

Nothing here is a DIY instruction for live work

Live electrical work is not a do-it-yourself subject here. Nothing on this site instructs a reader to open, probe or modify energized equipment.

Counting positions from the front of a panel is fine. Removing the dead front is where this site stops, and it stops there deliberately.

We say what we could not verify

Tandem (twin, half-height, duplex) breakers: the rule in the trade is that they are permitted only in panelboards listed and marked for them, and only in the positions the label allows.

We did not obtain verbatim code text or a listing document for that rule on the retrieved date, so it is stated here as the consistently reported position and as a direction to read the label inside your own panel door, not as a quoted code citation.

NEC Article 702 (optional standby systems) and Article 705 (interconnected power production sources, including the busbar sizing allowance often called the "120 percent rule") are directly relevant to generator and battery work.

We did not retrieve verbatim text for either on the retrieved date, so no numeric rule from them is quoted anywhere on this site. Ask the electrician which article they are working to.

One number that genuinely is local: what your electricity costs

Several of these tools ask for a rate rather than assuming one, because the spread across states is larger than most people assume. These are EIA figures for June 2026, and yours is on your bill.

State	Residential price	Relative to the US average
Hawaii	52.72¢/kWh	+187%
California	34.74¢/kWh	+89%
Massachusetts	29.61¢/kWh	+61%
New York	29.49¢/kWh	+61%
Pennsylvania	21.73¢/kWh	+18%
Illinois	19.89¢/kWh	+8%
US average	18.34¢/kWh	—
Georgia	16.36¢/kWh	-11%
Texas	15.94¢/kWh	-13%
Arizona	15.18¢/kWh	-17%
Florida	15.10¢/kWh	-18%
Washington	14.91¢/kWh	-19%
Idaho	14.37¢/kWh	-22%
North Dakota	14.12¢/kWh	-23%
Louisiana	13.49¢/kWh	-26%
Utah	13.37¢/kWh	-27%

US Energy Information Administration, Electric Power Monthly, Table 5.6.A — Average Price of Electricity to Ultimate Customers by End-Use Sector, June 2026, retrieved 2026-09-05.

The relative column is our arithmetic on those figures. State averages conceal wide variation between utilities and tariffs; the rate that applies to you is the one printed on your own bill.

What HyreElectrical is, and what it is not

We do not perform electrical work. HyreElectrical does not perform, supervise or warrant electrical work, does not open panels, and does not pull permits. Nothing on this site may claim or imply otherwise, and the inquiry form is not a dispatch line.

We do not rank or refer contractors, and take no referral fee. There is no sponsored placement here and no list of "top" electricians. The license tool routes you to a state board because the board’s record is the authority and our opinion is not.

We hold no dataset of prices, bids or jobs. HyreElectrical holds no dataset of bids, invoices, inspections or jobs. No figure on this site is our own measurement of the market.

Every figure across these sixteen tools is a named third party’s published position, or arithmetic we performed on one and labeled as ours. Where a chart shows relative magnitude rather than data, its own caption says so.

We are not a code authority. Adoption and amendment of the National Electrical Code is local. A state or city may be on an older edition, may amend it, and may add rules of its own.

Confirm the adopted edition and the amendments with the authority having jurisdiction before relying on any code figure here. We quote articles so that you can look them up and so that a professional can tell you where we are out of date for your jurisdiction.

We are not tax advisers. The 25C credit is discussed on two pages only because an expired incentive is a persuasive sales line.

On the retrieved date the IRS states the credit window as ending before 31 December 2025. Property placed in service after that date is outside the window described.

Any page, quote or salesperson still offering "the federal panel credit" as a live discount in 2026 is describing a window the IRS page no longer describes as open.

Confirm your own position with the IRS page or a tax professional; we are neither.

Why any of that matters to you. It determines what these tools are able to conclude. Every one of them can end with "nothing needs to change", and several of them regularly do.

The vocabulary that runs across all sixteen

Terms that appear on several of these pages, with the meanings they carry in the trade rather than in advertising.

Service: The utility’s delivery to the building and the equipment that terminates it. NEC 230.79(C): “For a one-family dwelling, the service disconnecting means shall have a rating of not less than 100 amperes, 3-wire.”
Panel (load center): The enclosure holding the breakers. It has a number of positions, a busbar rating and a main breaker rating, and those three limits fail independently of each other.
Calculated load: The result of running an article of the Code over your nameplates with demand factors applied. Always smaller than the nameplate sum, and it is the figure a service is sized against.
Continuous load: One expected to run at maximum for three hours or more, sized at 125 percent. NEC 625.42 names EV charging as continuous explicitly.
GFCI: Ground-fault circuit interrupter. Protects people by detecting current leaving the intended path. NEC 210.8(A) applies it to 125 V through 250 V receptacles across a long list of dwelling locations.
AFCI: Arc-fault circuit interrupter. Detects the signature of arcing, which is a fire risk rather than a shock risk. NEC 210.12(B) covers 14 named categories of dwelling area.
Level 1 and Level 2 charging: 120 V and 240 V. DOE puts them at roughly 5 and 25 miles of range per hour of charging respectively.
Transfer equipment: What keeps a generator’s output and the utility’s supply from ever meeting. It is the part of a standby installation that protects line workers, and it is licensed work in every version of this story.
Carbon monoxide: The reason portable generators kill people. CPSC: “Never use a portable generator inside homes, garages, basements, crawlspaces, sheds or other enclosed areas, even if doors or windows are open.” and “Operate generators outdoors only, at least 20 feet from homes and buildings, with exhaust directed away from windows, doors and vents.”
Authority having jurisdiction: The office that adopts the code edition, issues the permit and performs the inspection where you live. When this site and your AHJ disagree, your AHJ is right.

Questions this calculator answers

How do I know if my electrical service is too small?: By running the load calculation, not by adding up nameplates. NEC 220.82 counts the first 10 kVA of general load at 100% and the rest at 40%, so the sum printed on your appliances is always far larger than the figure a service is sized against. The load calculator follows that method.
My panel is full. Do I need a service upgrade?: Not necessarily: physical space and electrical capacity are separate limits. If the panel is out of room but the calculation passes, a subpanel is the usual answer and the utility is not involved. If the calculation fails, that is a capacity question, and even then a managed load may change the result.
Does adding an EV charger mean upgrading the service?: Often not. NEC 625.42 treats charging as a continuous load, but 625.42(A) lets a listed energy management system set the charger load used in the service calculation. A charger set to a lower current, or managed to yield to other loads, counts as a smaller load. Ask whether that was considered.
How common are electrical fires?: The CPSC estimates an annual average of 17,100 residential fires from electrical distribution equipment in 2019 to 2021: 4.9% of residential fires, but 6.0% of the deaths (150 a year) and 6.1% of injuries (680). That pattern fits fires that start in concealed wiring, out of sight, at night.
Are power outages getting worse?: Major events are. The EIA reports an average of 11 hours of interruptions per customer in 2024, nearly twice the prior decade's average, with major events causing nearly nine of those hours against about four a year in 2014 to 2023. Routine interruptions still average about two hours a year.
Why will you not tell me what a panel upgrade costs?: Because we hold no dataset of bids, and the averages in circulation come from lead-generation sites with unpublished methods. Labor rates, the code edition, permit fees, utility involvement and the existing wiring move the figure too far for a national number. Type your written estimate into the project cost tool.
Is there still a federal tax credit for an electrical panel?: Not for new work. The IRS describes the 25C credit as ending for property placed in service after 31 December 2025. While it ran, panelboards of 200 amps or more qualified, capped at $600. If a quote leans on the credit, ask for the current IRS page. We are not tax advisers.
Do any of these tools replace an electrician?: None of them. They are here so you arrive at the conversation knowing which questions to ask and which arithmetic is being done. Nothing here is a stamped load calculation, a design, a permit document or an inspection, and nothing here instructs anyone to work on live equipment.

Sources and methodology

Figures dated 5 September 2026. Last reviewed August 16, 2026.

NFPA 70 Article 220 (2014 edition), hosted copy (NFPA, via IEEE ICPS chapter library, retrieved 2026-09-05. Verbatim text of the optional dwelling calculation in 220.82 and the existing-dwelling article 220.83. This is the 2014 edition — the edition of the full article text we could retrieve verbatim. Adoption and amendment are local.)
NEC 625.42 Rating (2023 edition) (NFPA 70, reproduced by ElectricalLicenseRenewal, retrieved 2026-09-05. EV charging as a continuous load, and the energy-management allowance in 625.42(A).)
NEC 230.79 Rating of Service Disconnecting Means (NFPA 70, reproduced by UpCodes, retrieved 2026-09-05. 100 A, 3-wire minimum for a one-family dwelling. Wording as reproduced by UpCodes rather than obtained from NFPA directly.)
2019–2021 Residential Fire Loss Estimates (May 2024) (US Consumer Product Safety Commission, retrieved 2026-09-05. 17,100 annual average residential fires attributable to electrical distribution equipment, 150 deaths, 680 injuries, and the Table 4a equipment breakdown charted on this page.)
Hurricanes in 2024 led to the most hours without power in the United States in 10 years (US Energy Information Administration, retrieved 2026-09-05. An average of 11 hours of interruptions per customer in 2024, of which nearly nine hours were attributed to major events.)
Electric Power Monthly, Table 5.6.A (US Energy Information Administration, retrieved 2026-09-05. Average residential price of electricity by state, June 2026, used for the price table on this page.)
Electric Vehicle Charging Stations (US Department of Energy, Alternative Fuels Data Center, retrieved 2026-09-05. Level 1 and Level 2 charging voltages and approximate miles of range added per hour.)
CPSC Warns of Generator, Carbon Monoxide and Fire Hazards Ahead of Hurricane Season (US Consumer Product Safety Commission, retrieved 2026-09-05. The 20-foot placement rule and the prohibition on operating a portable generator in any enclosed or partially enclosed space.)

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