GFCI vs. AFCI: What the 2025 NYC Electrical Code Requires in Your Home

Two of the most important safety devices in your home are also two of the most commonly confused: GFCIs and AFCIs. They sound alike, they live in the same panel or outlet box, and they both "trip" when something goes wrong. But they guard against completely different dangers — one protects people from shock, the other protects the building from fire. If you own a home or run a business in NYC, it pays to know which is which, and where the code now requires each one.

This matters more than usual right now. New York City recently modernized its electrical rules: the 2025 NYC Electrical Code is based on the 2020 National Electrical Code (NEC) and was adopted through Local Law 128 of 2024, taking effect December 21, 2025. It replaced a code that had been anchored to the 2011 NEC for over a decade — so the protection requirements for ordinary homes have meaningfully expanded.

What a GFCI actually does

A GFCI — Ground Fault Circuit Interrupter — compares the electricity flowing out to a device with the amount coming back. In a healthy circuit, those match almost exactly. If even a tiny amount of current goes missing — say, because it found a path through a person standing in a wet bathroom — the GFCI senses the imbalance and shuts the circuit off in a fraction of a second.

In short, GFCIs protect people from electrocution. That's why they live in wet and damp places. You'll recognize them as the outlets with the little "TEST" and "RESET" buttons.

What an AFCI does differently

An AFCI — Arc Fault Circuit Interrupter — listens for the electrical "signature" of a dangerous arc: the sparking, sputtering current you get from a frayed wire behind a wall, a cord crushed under furniture, or a loose connection in an old junction box. Those arcs throw enough heat to ignite wood framing and insulation, and they are a recognized cause of home electrical fires.

So AFCIs protect the structure from fire. They're usually installed as breakers in your panel rather than as outlets, because they watch an entire circuit.

The two are not interchangeable. A GFCI will not catch a hidden arc starting a fire; an AFCI will not stop you from being shocked at the sink. That's why modern code calls for both — and increasingly, for combination "dual-function" devices that do both jobs at once.

Where NYC code requires GFCI protection

Under the 2020 NEC now in force in NYC (Section 210.8), GFCI protection is required for dwelling-unit receptacles in essentially every location where water and electricity can meet:

Bathrooms — all receptacles
Kitchens — receptacles that serve the countertop surfaces
Garages and accessory buildings
Outdoors — exterior outlets, a common gap in older brownstones and row houses
Basements — both finished and unfinished
Laundry areas
Within 6 feet of any sink — including utility and wet-bar sinks

That last rule is worth flagging, because it often catches kitchen receptacles that aren't serving the countertop — a fridge or microwave outlet that happens to sit within six feet of the sink can still land in GFCI territory.

Another expansion to know about: the 2020 code extended GFCI protection up to 250-volt receptacles in these locations. In practice, that pulls an electric clothes dryer (covered as a laundry-area receptacle) into the requirement, and an electric range too when it sits within six feet of the kitchen sink. In our older housing stock, these frequently surface during a kitchen or laundry renovation.

Where NYC code requires AFCI protection

AFCI protection (per NEC 210.12) applies to 120-volt, 15- and 20-amp branch circuits serving the living areas of a home — which is to say, most of it:

Bedrooms
Living rooms, dens, libraries, and parlors
Dining rooms and family rooms
Sunrooms and recreation rooms
Hallways, closets, and laundry areas
Kitchens

Because that list overlaps with the GFCI list in places like kitchens and laundry rooms, those circuits commonly call for combination AFCI/GFCI protection.

Why this matters for older NYC homes

Most of NYC's housing — pre-war apartments, brownstones, and 1–3 family homes — was wired long before either device existed. There's no legal requirement to rip out and rewire a home just because the code evolved. But the moment you do almost any meaningful electrical work — a renovation, a panel upgrade, an addition, or work that needs a DOB permit and sign-off — the current code applies to what you touch, and a licensed electrician will bring those circuits up to standard.

It's also simply good sense. These devices fail safe and they're inexpensive insurance against the two worst outcomes in a home: a shock and a fire. If your panel is full of plain breakers and your bathroom and kitchen outlets have no TEST/RESET buttons, that's a strong signal it's worth a look. A professional safety check can tell you exactly where you stand and what, if anything, the code now expects — see our electrical repairs and inspections for what that involves.

Not sure whether your home is protected? Chazon Electric installs and tests GFCI and AFCI protection across all five boroughs, in line with the current NYC Electrical Code. Call (718) 924-8062 to schedule an inspection.