September 1 came and went, and with it went the exemption that kept GFCI breakers off your outdoor units. If you change out condensers, this fight just landed on your truck.
Here's the short version. The 2020 National Electrical Code added a requirement: outdoor air conditioners and heat pumps get GFCI protection under Section 210.8(F). Before 2020, nobody required that on a condenser connection. In 2022, after an appeal led by ACCA and AHRI, the NFPA exempted outdoor HVAC equipment from the requirement until September 1, 2026 — an exemption that carried into the 2023 and 2026 editions.
The industry asked for more time. AHRI submitted Tentative Interim Amendment (TIA) 1924, asking to extend the exception to September 1, 2028. On September 18, Code-Making Panel 2 denied it — the technical-merit vote tied 10-10, which falls short of the threshold to approve. In the last week of September, ACCA and AHRI both filed appeals with the NFPA Standards Council asking it to reconsider and approve the TIA.
Why the industry keeps fighting this
This isn't contractors being anti-safety. ACCA says flat-out that it supports GFCI protection — the fight is about compatibility. The problem is nuisance tripping: GFCI devices tripping on equipment that was installed right and is running fine. An unwanted trip on a condenser in August isn't an inconvenience. It's a no-cooling call, and if the homeowner is elderly or the house hits dangerous temperatures, ACCA's point is that losing cooling in extreme heat is itself a life-safety risk.
The compatibility problem isn't solved yet. High-frequency GFCI products exist now, and that's progress — but ACCA's position is that they don't establish compatibility across everything Section 210.8(F) covers. Technology aimed at the high-frequency leakage you get with inverter-driven systems doesn't necessarily fix nuisance tripping at 60 hertz, and it says nothing about the conventional single-stage equipment still going in every day. ACCA is calling for lab and field testing of both inverter-driven and single-stage systems before the requirement sticks.
And there's a procedural mess on top of it. AHRI submitted the TIA in May 2026, but it wasn't posted for public comment until August 10, with comments due September 9 — past both the Standards Council's August meeting and the September 1 expiration. AHRI's appeal raises procedural concerns about how that was handled; ACCA's focuses on the technical compatibility and what contractors are actually facing in the field. For what it's worth, 90% of the 30 public comments submitted supported the extension.
What it means on your truck
Right now, the exception is expired and the requirement is live while the appeals move through the process. The next NFPA Standards Council meeting is scheduled for December 15, and as of late September no hearing date had been set. So for the moment, enforcement is up to state and local authorities — and it's a patchwork. Some jurisdictions modified the requirement, delayed enforcement, or removed it. States still on a 2017 or earlier NEC edition aren't touched by it at all.
So here's my field advice, and it's the same advice I give about everything else in this trade: talk to your inspector, not the internet. Know which NEC edition your locality actually enforces before you quote the job. Virginia runs the 2021 Virginia Uniform Statewide Building Code — the refrigerant transition is federal, but the install is inspected local, and the same is true here.
A few more things worth saying plainly:
**Don't bypass a GFCI to keep a unit running.** Back in 2022, ACCA's Ed Lehr testified that nuisance trips were pushing customers to reset or bypass GFCI devices themselves to keep equipment operative — and that puts the homeowner in harm's way. If a breaker is tripping, the answer is a documented service call, not a jumper wire. You don't want your name anywhere near that.
**Document your nuisance trips.** The industry is quite literally building its case on field evidence. If you get a callback where a properly installed unit is tripping a GFCI with no ground fault you can find, write it down — equipment model, breaker, conditions. That's data now.
**Don't scare the customer.** This is where the honest-shop philosophy matters. A homeowner doesn't need a lecture on NFPA Standards Council procedure, and they definitely don't need a scare pitch about their condenser being "illegal." What they need is the straight version: the rules changed, we're handling it, here's what it means for your install. Same as the refrigerant transition — explain it, don't weaponize it.
The bottom line
Half the country is now working under the newer GFCI rules with the exemption gone, the appeals are in, and the next decision point is December. The requirement isn't going away forever — the industry's ask is for time to get the compatibility right, not a permanent pass. In the meantime, the techs who know their local enforcement, document what they see, and explain it straight to customers are the ones who'll come out of this looking like the professionals in the room.