Big Maxx furnace wiring questions

[shaggyant]

I’m getting ready to run the wire for my Big Maxx heater install and I have a NEC code related question.

I started at section 422.12 it states.

422.12 Central Heating Equipment. Central heating equipment other than fixed electric space-heating equipment shall be supplied by an individual branch circuit.
Exception No. 1: Auxiliary equipment, such as a pump,
valve, humidifier, or electrostatic air cleaner directly asso-
ciated with the heating equipment, shall be permitted to be
connected to the same branch circuit.
Exception No. 2: Permanently connected air-conditioning
equipment shall be permitted to be connected to the same
branch circuit.

Then I see that 210.63 requires a “service receptacle”

210.63 Heating, Air-Conditioning, and Refrigeration Equipment Outlet. A 125-volt, single phase, 15- or 20-ampere-rated receptacle outlet shall be installed at an accessible location for the servicing of heating, air-conditioning, and refrigeration equipment. The receptacle shall be located on the same level and within 7.5 m (25 ft) of the heating, air-conditioning, and refrigeration equipment. The receptacle outlet shall not be connected to the load side of the equipment disconnecting means.

Does this mean that I need two circuits for this heater?

Since the furnace is 14 feet in the air does a disconnect need to be up there or can I use the circuit breaker for the disconnect?

 

[FreddiFiche]

One 15a circuit, to a dedicated (single) outlet, mounted high next to the furnace. Mount a 3 prong plug to the heater, that is a good quality cord. That is your disconnect, just like a ac unit.

 

[shaggyant]

One 15a circuit, to a dedicated (single) outlet, mounted high next to the furnace. Mount a 3 prong plug to the heater, that is a good quality cord. That is your disconnect, just like a ac unit.

But if I put in a receptacle then won’t the circuit need GFCI protection?

I’d rather not have to worry about a GFCI tripping the heater. No one is monitoring the shop on a daily basis and it could be a week before I noticed.

 

[FreddiFiche]

Nope. That's why i said to put a single outlet, not a duplex. If it's dedicated use, no GFCI required. Single outlet, that is not readily accessible...you've got it doubly covered. The fact that you can easily unplug the unit to service it, covers you on the disconnect part.

 

[FreddiFiche]

Like this. Commonly done, and passes inspection.

 

[pattenp]

I assume there is an outlet in the garage/shop within 25ft of the heater. Level means floor or ground level not on same plane as heater. If panel is in sight of heater use breaker as disconnect, otherwise install simple switch at unit.

 

[pattenp]

Where does the NEC state single 120V outlets are not required to be GFI protected in a garage? I assume this heater is in a garage.

 

[shaggyant]

I assume there is an outlet in the garage/shop within 25ft of the heater. Level means floor or ground level not on same plane as heater. If panel is in sight of heater use breaker as disconnect, otherwise install simple switch at unit.

I interpreted level to be the ceiling plane that the heater will be on. If I can use wall outlets ten feet below I can make the 25 foot limit. Does a switch with a knockout cover plate exist?

Where does the NEC state single 120V outlets are not required to be GFI protected in a garage? I assume this heater is in a garage.

That was my concern. Everything I’ve read in the code says all receptacles in a detached shop must be GFCI protected. Im going to look for a code number referencing a GFCI exemption for dedicated receptacles?

 

[FreddiFiche]

Where does the NEC state single 120V outlets are not required to be GFI protected in a garage? I assume this heater is in a garage.

Single outlet, on a dedicated circuit, that is not readily accessible, No?

I just hashed this (Mine) out with the inspector no less than 6 months ago.

 

[Bert_]

Single outlet, on a dedicated circuit, that is not readily accessible, No?

I just hashed this (Mine) out with the inspector no less than 6 months ago.

I've seen it and done it that way but the nec doesn't have any exceptions for 15/20A 120v straight blade recepts. They all need gfci. Regardless I would have no problem doing it again with NO gfci.

 

[pattenp]

Single outlet, on a dedicated circuit, that is not readily accessible, No?

I just hashed this (Mine) out with the inspector no less than 6 months ago.

Per the NEC, No. All 120v 15/20A outlets in garage are to be GFI protected.