Restaurant Electrical Work in New Jersey: Hood Interlocks, Kitchen GFCI and the Equipment Schedule

On a restaurant job, the electrical work that moves an opening date is rarely the dining room lighting. It is the hood: the exhaust fan, the fire suppression system above the cooking line, and the wiring that ties them to the cooking equipment. The second is the kitchen equipment list, which keeps changing until the week before opening. Here is how both work, plus the 2023 code change that put shock protection on far more kitchen outlets.

Which codes apply in New Jersey

As of August 17, 2026, New Jersey enforces the 2023 National Electrical Code (NEC) with amendments 1 through 13 and the 2024 New Jersey edition of the International Building Code (NJ Department of Community Affairs). The 2024 International Mechanical Code, which governs kitchen hoods and exhaust, is part of the same adoption. Most restaurant fit-outs happen in existing buildings, so the state's rehabilitation subcode, the rulebook for work in existing buildings, also applies. It requires an automatic fire extinguishing system for newly installed commercial cooking equipment that produces grease-laden vapors (N.J.A.C. 5:23-6.11(d)).

Three interlocks, three different jobs

An interlock is a wired connection that lets one system control another, so that one thing cannot happen unless something else has happened first. A commercial kitchen hood has three.

1. The fan and the cooking equipment

The mechanical code says the exhaust fan over a Type I hood, the hood used over grease-producing equipment, must either turn on automatically when any appliance under it is turned on, or the appliances must be locked out so they cannot run until the fan is on. If heat sensors start the fan, it has to come on within 15 minutes of the first appliance starting. The code also says this interlock may not rely on any part of the fire suppression system (2024 International Mechanical Code, Section 507.1.1; the full text is reprinted by UpCodes). That means a separate control circuit, designed before the walls close.

2. The fire system and the power to the cooking line

When the suppression system discharges, it must automatically shut off the fuel or electrical power to the cooking equipment, and the reset must be manual (New Jersey Building Subcode 2024, Section 904.14.2). NFPA 96, the national kitchen ventilation standard, says all fuel and electric power that produces heat to the protected equipment shall shut off (NFPA, extract of NFPA 96 Section 10.4.1).

On the gas side, that usually means an electrically held gas valve, a valve that stays open only while it has power, wired so the suppression system can cut that power. On the electric side, it means a shunt-trip breaker, which is a breaker that can be tripped by a remote signal, or a contactor, which is a heavy-duty switch controlled by a small signal wire. Every electric fryer, griddle and range under the hood needs a circuit the fire system can shut off.

3. The test that proves it

In New Jersey, the space cannot be occupied until the required fire protection systems have been tested and approved, and where required the test happens in front of the fire protection subcode official (New Jersey Building Subcode 2024, Section 901.5). When systems are connected to each other, the state fire code requires the response of each connected system to be checked during the test (New Jersey Fire Subcode 2024, Section 901.6.2). So the inspector trips the system and watches the gas valve close, the breakers open and the fan do what the system listing says it should do. If one fails, the next inspection slot sets the opening date.

Who does what

The suppression system itself, meaning the tank, piping, nozzles and pull station, is installed by a kitchen fire suppression contractor certified under New Jersey law (P.L.2023, c.186). It is permitted under the fire protection subcode, which lists the kitchen hood exhaust system as its own line item (NJ UCC form F140). We do not install suppression systems. What we install is the electrical side: the power to the gas valve, the shunt-trip breakers or contactors on the cooking circuits, the fan controls, and the connection back to the suppression system's switch. The test passes only when both contractors have coordinated, and that is the part usually left to the last week.

Kitchen outlets and the 2023 shock protection rule

A GFCI, short for ground-fault circuit interrupter, is a device that cuts power in a fraction of a second when it senses current leaking to ground, which is what happens when electricity passes through a person. The 2023 NEC requires GFCI protection for all 125-volt through 250-volt receptacles on single-phase circuits of 50 amps or less, and all receptacles on three-phase circuits of 100 amps or less, where those circuits are 150 volts or less to ground, in a list of commercial locations (2023 NEC Section 210.8(B), as quoted by ElectricalLicenseRenewal.com). The list includes:

Kitchens.
Areas with sinks and permanent provisions for food preparation, beverage preparation or cooking, such as a coffee bar or juice bar.
Buffet serving areas with permanent provisions for food serving, beverage serving or cooking.
Receptacles, or cord-connected fixed or stationary appliances, within 6 feet of a sink.

What this means for an owner: a 208-volt three-phase receptacle for a fryer or mixer in the kitchen now falls inside the rule, and three-phase GFCI protection costs more than a standard breaker. Some commercial equipment also trips GFCI protection in normal use, so we have the supplier confirm each cord-connected item before rough-in.

The equipment schedule is the electrical drawing

The equipment schedule is the kitchen designer's list of every appliance, with its voltage, phase, amps and whether it plugs in or is wired directly. The nameplate rating, meaning the electrical ratings printed on the appliance's data plate, is what we size each circuit to. When that list changes, the circuits change.

The changes that cost the most are predictable. A fryer switches from gas to electric and needs a new circuit, possibly new panel space, and a new tie-in to the fire system shutdown. A piece of equipment is ordered for 240 volts when the building supplies 208. A cord-and-plug item becomes hardwired. None are hard to build. They are hard to absorb once the ceiling is closed and the fire test is booked.

We price against a dated equipment schedule, name it in the proposal, and ask for a freeze date before rough-in. Later changes get priced the same day.

What to ask before you award the electrical work

Which revision of the equipment schedule is the price based on, and what is the freeze date?
How will each cooking circuit under the hood be shut down by the fire system: shunt trip or contactor?
Who coordinates the interlock wiring with the suppression contractor, and when?
Which kitchen receptacles need GFCI protection under the 2023 NEC, and has the equipment supplier confirmed compatibility?
Will you be on site for the fire protection acceptance test?

Where Zimick Electric fits

Restaurants are one of our core markets, including kitchens where the dining room stays open while the trades work. Our restaurant work covers kitchen equipment power, hood and suppression interlocks, dining and exterior lighting, and point-of-sale and low-voltage rough-in. We are an IBEW Local 164 signatory contractor under New Jersey Electrical Contractor License 34EB01813400, and the person who prices your job reads the drawings and answers the phone. We hand over closeout paperwork with the keys. If you are planning a kitchen, send us the equipment schedule and the drawings.

Code requirements in this article are drawn from the New Jersey adoption notice, the New Jersey Building, Fire and Rehabilitation Subcodes, the 2024 International Mechanical Code, NFPA 96 and the 2023 NEC as published or quoted at the links above, as of November 2, 2026. The full NEC and NFPA 96 texts are sold by NFPA, so the NEC wording is quoted from a published code course and the NFPA 96 wording from NFPA's own extract. Local fire officials may interpret these sections differently. Confirm requirements for your project with your construction official.