Short answer: if you are replacing the electrical panel or upgrading the service on a Texas house, almost certainly yes. The code requires a disconnect outside the house, so a firefighter can cut all the power without going in. It first appeared in the 2020 National Electrical Code, stayed in the 2023 edition, and carried straight into the 2026 edition that Texas adopted on September 1, 2026.
What changed is where it sits in the code book. That matters more than it sounds, because depending on which city you live in, your contractor and your inspector may quote you different section numbers — and both can be right.
What it costs is covered in the electrical panel upgrade cost guide. This page is about whether you need one, and how to tell whether a bid got it right.
What an outdoor emergency disconnect actually is
It is a breaker or switch, mounted outside, that shuts off power to the whole house. On most Texas installs it takes one of two forms:
- A meter-main combination — the meter and the main breaker in one outdoor enclosure. The panel inside the house then works as a subpanel.
- A separate disconnect mounted beside the meter, ahead of the indoor panel.
Either way it has to be labelled. Under the 2026 edition (§230.70(B)), every service disconnect is marked SERVICE DISCONNECT, and on a one- or two-family home the outside of the enclosure must also read EMERGENCY DISCONNECT — white letters on a red background, at least half an inch tall. If you are looking at a finished job and there is no emergency label on the outside, something was skipped.
When it is required — and when it is not
The requirement is triggered by installing or replacing service equipment. In practice:
- New homes. Required.
- Panel replacement or a service upgrade — 100 to 200 amps, say — where the service equipment is being replaced. Required. In the 2026 code this is the rule at §230.70(E).
- Replacing only the meter socket, the service-entrance conductors, or their conduit and fittings. Not triggered. The 2026 code carves these out by name.
- A house nobody is working on. Not required. The code does not reach back and make you retrofit a home that met the rules when it was built.
The grey zone is everything in between: adding circuits, relocating a panel, swapping breakers. Whether a particular job counts as replacing service equipment is the inspector’s call. Ask the permit office before you sign, not after the inspection.
Why your contractor and your inspector might quote different section numbers
In the 2020 and 2023 editions of the NEC the rule was §230.85. The 2026 NEC deleted §230.85 and folded it into §230.70: the outdoor location is §230.70(A)(1), the labelling is §230.70(B), and the replacement trigger is §230.70(E). Texas adopted the 2026 edition statewide, effective September 1, 2026, in 16 TAC §73.100.
Here is the part most pages on this miss. Inside city limits, the edition that governs is the one your city has adopted. Texas Occupations Code §1305.201(d) says electrical work inside a municipality must be installed in accordance with local ordinances, and cities adopt NEC editions — with their own amendments — on their own schedules. Outside city limits, §1305.201(e) requires standards at least as stringent as the state code.
So the section number depends on where you live:
- Fort Worth — moved with the state. The city says it adopted the 2026 NEC effective September 1, 2026.
- Dallas — rewrote its electrical code on the 2023 edition in 2025 (adopted April 2025, in effect May 23, 2025), and we found no 2026 adoption yet. Until it adopts one, the Dallas ordinance is built on the edition where the rule is §230.85.
- Arlington — the electrical code posted on the city’s site still adopts the 2020 edition, where the rule is also §230.85.
- Coppell — city staff recommended adopting the 2026 edition, with no local amendments, in August 2026, to line up with the state.
- Anywhere else — call the permit office. “Which NEC edition are you enforcing on residential permits?” is a question they answer all day.
What does not change: under either edition, the outdoor disconnect is required. A contractor who tells you it went away with §230.85 is wrong. A contractor who cites §230.85 in a city still on the 2020 or 2023 code is right. Only the number moved.
Which edition applies to your job
For permitted work, it is generally the code in effect when the permit is obtained. For work done without a permit, it is the code in effect on the day the equipment starts going in. McKinney words its version plainly: permits applied for on or after September 1, 2026 must comply with the 2026 NEC. If your job straddles that date, ask the permit office which one they will inspect to.
Skipping the permit does not get you out of it — both editions require the disconnect. And a panel replacement is not a homeowner job in most of DFW anyway; see the Texas home repairs you are not allowed to do yourself. For your city specifically: homeowner electrical rules, city by city.
Two situations that work a little differently
Your meter is on a pole or pedestal, not on the house
Common on acreage and rural lots. If the service disconnect is at a meter pole out in the yard and the house is fed from there, the parallel rule is §225.41: the house still gets an outdoor emergency disconnect, and in the 2026 edition it must be within sight of the dwelling it serves.
You have solar, a generator or a home battery
The 2026 code moved the rule on other power sources into §230.70(D): a plaque or directory at the service disconnect showing where the disconnect for every other source is. The point is that a firefighter who throws the main still knows the solar array or the battery can keep a circuit live. If your house has any of these, that directory belongs on the bid.
What to check on the bid
- The disconnect is a named line item, or the bid specifies a meter-main combination. “Replace panel” on its own is how it goes missing.
- The permit is included, and the electrician pulls it — not you.
- The labels are part of the job, not something left for later.
- A source directory, if the house has solar, a generator or a battery.
- Ask which code edition your city is enforcing. An electrician who works your city regularly will know without looking it up.
For what the disconnect and the rest of a panel job cost in DFW, see the electrical panel upgrade cost guide. For the rest of the paperwork, see how to read a contractor’s bid.
Where this comes from
- Texas Department of Licensing and Regulation — adoption of the 2026 NEC, 16 TAC §73.100, effective September 1, 2026.
- NFPA 70, National Electrical Code, 2026 edition — §230.70(A)(1), (B), (D) and (E), and §225.41. The 2023 edition — §230.85.
- Texas Occupations Code §1305.201 — municipal regulation of electrical work.
- Texas Local Government Code §214.214 — the NEC as the municipal electrical code, and cities’ power to amend it.
- City of Fort Worth — adopted building and energy codes.
- City of Dallas — memo on adopting the 2023 NEC as the Dallas Electrical Code, 2025.
- City of McKinney — 2026 NEC significant changes.
Written by Jimmy Hall, a Texas homeowner — not a contractor, plumber, electrician or adjuster. Why that matters. Reviewed September 2026. Cities change code editions by ordinance; if yours has moved and this page has not caught up, tell us.
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