GFCI protection for dishwashers

[wyboy]

Does the GFCI protection for dishwashers apply for the heater booster on a commercial dishwasher? It is a different circuit.

 

[romex jockey]

i'm ropin' up two com kitchens right now, and will probably do it anyways

~RJ~

 

[Dennis Alwon]

2017 NEC

(B) Other Than Dwelling Units. All single-phase receptacles
rated 150 volts to ground or less, 50 amperes or less and three phase
receptacles rated 150 volts to ground or less,
100 amperes or less installed in the following locations shall
have ground-fault circuit-interrupter protection for personnel.

(1) Bathrooms
(2) Kitchens
(3) Rooftops
Exception: Receptacles on rooftops shall not be required to be readily
accessible other than from the rooftop.
(4) Outdoors
Exception No. 1 to (3) and (4): Receptacles that are not readily accessible
and are supplied by a branch circuit dedicated to electric snowmelting,
deicing, or pipeline and vessel heating equipment shall be
permitted to be installed in accordance with 426.28 or 427.22, as
applicable.
Exception No. 2 to (4): In industrial establishments only, where the
conditions of maintenance and supervision ensure that only qualified
personnel are involved, an assured equipment grounding conductor
program as specified in 590.6(B)(3) shall be permitted for only those
receptacle outlets used to supply equipment that would create a greater
hazard if power is interrupted or having a design that is not compatible
with GFCI protection.
(5) Sinks — where receptacles are installed within 1.8 m
(6 ft) from the top inside edge of the bowl of the sink
Exception No. 1 to (5): In industrial laboratories, receptacles used to
supply equipment where removal of power would introduce a greater
hazard shall be permitted to be installed without GFCI protection.
Exception No. 2 to (5): For receptacles located in patient bed locations
of general care (Category 2) or critical care (Category 1) spaces of health
care facilities other than those covered under 210.8(B)(1), GFCI protection
shall not be required.
(6) Indoor wet locations
(7) Locker rooms with associated showering facilities
(8) Garages, service bays, and similar areas other than vehicle
exhibition halls and showrooms
(9) Crawl spaces — at or below grade level
(10) Unfinished portions or areas of the basement not intended
as habitable rooms

 

[LarryFine]

" . . . having a design that is not compatible with GFCI protection."

This could be applied to a lot of equipment.

 

[retirede]

" . . . having a design that is not compatible with GFCI protection."

This could be applied to a lot of equipment.

But a lot of caveats before you are allowed to forgo GFCI.

 

[texie]

Does the GFCI protection for dishwashers apply for the heater booster on a commercial dishwasher? It is a different circuit.

The code is not very specific on this as it does not indicate whether a booster heater is part of the dishwasher. If by chance the booster is 480 volt or over 60 amps the question is moot as GFCI would not be needed at all. Yet another area of new code that was not thought through very well.
Can you post the make, model and voltage? What does your friendly state electrical chief say?

 

[wyboy]

2017 NEC

This is hard wired-not a recpt.

 

[Rock86]

This is hard wired-not a recpt.

Would it hurt anyone to throw it on a GFCI breaker? Is it worth the trouble of potentially arguing an inspector later?

 

[jap]

This is hard wired-not a recpt.

I don't see this as being required to be GFI protected.

JAP>

 

[texie]

The OP is in Wyoming and they are on the 2020 NEC. In the 2020 edition commercial dishwashers are required to be GFCI protected, hardwired or not. What is not clear is his situation. Hoping he will reply to my post #6.

 

[jap]

The OP is in Wyoming and they are on the 2020 NEC. In the 2020 edition commercial dishwashers are required to be GFCI protected, hardwired or not. What is not clear is his situation. Hoping he will reply to my post #6.

Good to know.

We're not that far along in our area.

Thanks,

JAP>

 

[wyboy]

The code is not very specific on this as it does not indicate whether a booster heater is part of the dishwasher. If by chance the booster is 480 volt or over 60 amps the question is moot as GFCI would not be needed at all. Yet another area of new code that was not thought through very well.
Can you post the make, model and voltage? What does your friendly state electrical chief say?

The voltage is 208 three-phase. I was not aware when posted that the booster heater was a separate unit from the dishwasher. Since it is a separate unit, we can, according to the inspector, wire it like we would if it was a water heater-no GFCI required.

 

[Dennis Alwon]

Per 2020 NEC

210.8(D) Specific Appliances.
Unless GFCI protection is provided in accordance with 422.5(B)(3) through (B)(5), the outlets supplying the appliances specified in 422.5(A) shall have GFCI protection in accordance with 422.5(B)(1) or (B)(2).
Where the appliance is a vending machine as specified in 422.5(A)(5) and GFCI protection is not provided in accordance with 422.5(B)(3) or (B)(4), branch circuits supplying vending machines shall have GFCI protection in accordance with 422.5(B)(1) or (B)(2).

422.5(A) General.

Appliances identified in 422.5(A)(1) through (A)(7) rated 150 volts or less to ground and 60 amperes or less, single- or 3-phase, shall be provided with Class A GFCI protection for personnel. Multiple Class A GFCI protective devices shall be permitted but shall not be required.

• (1)Automotive vacuum machines
• (2)Drinking water coolers and bottle fill stations
• (3)Cord-and-plug-connected high-pressure spray washing machines
• (4)Tire inflation machines
• (5)Vending machines
• (6)Sump pumps
• (7)Dishwashers

Informational Note:
Section 210.8 specifies requirements for GFCI protection for the branch-circuit outlet where the covered location warrants such protection