Whole-home surge protection: does the code actually bind you?

Section 230.67 is a model requirement, and models bind nobody until adopted

Section 230.67 of the National Electrical Code was introduced in the 2020 edition and is the reason whole-home surge protection appears on modern panel quotes at all. In substance, as described by the code-education and manufacturer technical sources listed below (retrieved 2026-09-17): services supplying dwelling units must be provided with a surge-protective device; the device must be an integral part of the service equipment or located immediately adjacent to it; it must be a Type 1 or Type 2 device; and where service equipment is replaced, the requirement applies.

Two later editions widened the occupancies rather than changing the dwelling rule. The 2023 edition extended the requirement to dormitory units, hotel and motel guest rooms and suites, and areas of nursing homes and limited-care facilities used exclusively as patient sleeping rooms. The 2026 edition extended it further, to sleeping quarters in fire, police, ambulance, rescue and ranger stations and similar locations. The same technical summary states a minimum nominal discharge current rating of 10 kA. For an ordinary single-family house, the dwelling-unit rule from 2020 is the one that matters, and the later editions did not weaken it.

None of that is automatically your obligation. The NEC is a model code published by a private standards body. It acquires legal force in a given place only when a state or a local jurisdiction adopts an edition of it, and jurisdictions adopt on their own schedules, sometimes lag by two cycles, and frequently amend what they adopt. A house in a jurisdiction still enforcing the 2017 edition is in a place where 230.67 does not exist as a requirement. A house in a jurisdiction on the 2020 cycle or later is in a place where it does — for a new service, and for a replaced one.

HyreElectrical analysis: the practical consequence is that "is whole-home surge protection required?" is not a question with a national answer, and a page that gives one is answering a question adjacent to the one you asked. The answer is produced by naming your jurisdiction and the edition in force on your permit date. That is the same structural problem the NEC edition lookup exists to explain, and the same reason it refuses to show a colour-coded map.

Surge protection reduces exposure — it is not a guarantee, and nobody should sell it as one

A surge-protective device limits the voltage that reaches downstream wiring during a transient by diverting current away from the protected conductors. That is a real and worthwhile function, and it is the reason the model code moved to require it at dwelling services. It is not a force field.

What a whole-home device does not do is worth stating plainly, because it is where surge protection is most often oversold. A service-entrance device does not protect against a direct lightning strike to the structure — that is a different energy scale and a different discipline. It does not eliminate surges generated downstream of it by equipment inside the house, which is the argument for point-of-use protection at sensitive electronics rather than instead of it. It does not protect equipment connected by other paths into the building, such as coaxial or ethernet runs, unless those paths are separately protected and bonded. And a device that has absorbed significant energy may be degraded or spent, which is why most have a status indicator that somebody actually has to look at.

Layered protection is the standard framing: a Type 1 or Type 2 device at the service handles the large external events, and point-of-use protection at expensive or sensitive equipment handles what is generated or survives downstream. Selling either one as complete on its own is a sales position, not an engineering one.

HyreElectrical publishes no joule rating, clamping voltage, brand comparison or product recommendation, and holds no dataset of device performance. Anything that looked like one here would be a manufacturer’s claim wearing our name.

Panel replacement is the trigger most homeowners are never warned about

The part of 230.67 with the widest practical reach on existing houses is the replacement provision. New construction is straightforward — the requirement applies, the device is fitted, the inspector checks it. The less obvious case is the house built decades before the section existed, whose owner is now replacing the service equipment for an unrelated reason.

Replacing service equipment brings the current requirements of the section into scope in a jurisdiction that has adopted an edition containing it. HyreElectrical analysis: this means the surge device is not usually a separate purchasing decision that homeowners make on its merits. It arrives attached to something else — a panel upgrade, a service increase for an EV charger, or the replacement of a hazard-era load centre — and it appears on the quote as a line the homeowner did not ask for and often assumes is an upsell.

Sometimes it is an upsell, and sometimes it is the code. The distinguishing question is the one in the checklist above, and it is answerable. Where the requirement does apply, the practical implication is that the device is cheapest to fit during work that already has the panel open and the permit pulled — the marginal cost of adding it to an existing mobilisation is not the same as the cost of a separate visit later.

For what genuinely moves the invoice on panel work, and the sourced municipal permit fees we have been able to verify from named fee sheets, see the panel upgrade cost guide. HyreElectrical publishes no national price for a surge device or its installation, because we hold no dataset of bids and will not invent one.

Where HyreElectrical stops and the electrician starts

HyreElectrical is an independent information site. We read the code-education and manufacturer technical publications, the federal safety notice, the municipal fee sheet and the utility tariff, and we publish what they say with the document and the retrieval date attached — and we publish what we could not verify, which on this topic is the state-by-state adoption record.

Our contractor store holds 16,369 electrical companies across 5 verified states — Florida 12,114, Utah 1,489, Nevada 1,066, California 903, Texas 839 — counted on 5 September 2026, 74% of it Florida. That is a research sample for five states, not a national census, not a ranking, and not a recommendation of any firm in it. Verifying a licence on the issuing board’s own register, using the licence lookup, is the check that counts.

We do not perform electrical work, do not sell or fit surge devices, and take no payment for placement. Matching is still being built; an enquiry here is not a service call.