[GatewaySparky]

Nec 422.12 says that i can run a permanently connected air conditioner off of the 60 amp branch feed to the heat strip in this furnace. So how would you guys do this? Do you come out of the furnace with the 10/2 cable or from a small breaker panel hooked to the 60? Do I just wire nut the 10 inside the air handler to the 6 gauge and take it to a fused disconnect outside? How would you do it? I'm trying to get around fishing an almost impossible 10/2 line to the panel. Thanks.

 

[HARRY304E]

Nec 422.12 says that i can run a permanently connected air conditioner off of the 60 amp branch feed to the heat strip in this furnace. So how would you guys do this? Do you come out of the furnace with the 10/2 cable or from a small breaker panel hooked to the 60? Do I just wire nut the 10 inside the air handler to the 6 gauge and take it to a fused disconnect outside? How would you do it? I'm trying to get around fishing an almost impossible 10/2 line to the panel. Thanks.

No...

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 associated 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.

The number 10 still must be protected, by fusing, or circuit breaker for it's rating.

 

[don_resqcapt19]

I would like to say that you just use the rule in 240.21(B)(2) and use an overcurrent device at the AC, but the circuit to the heat is a branch circuit and not a feeder.

 

[vasparky27]

For a 9.6 kw heat strip and a 3 ton outdoor unit we would run #2 too the attic, set a subpanel, feed the airhandler/heatstrips @ 60 amp ocpd and feed the out door unit/ condenser @30 amp ocpd in a disco at the unit. (In an existing home)

 

[vasparky27]

Never heard of a residential master electrician before...op

 

[GatewaySparky]

Not sure where that came from, and I hadn't noticed.

 

[vasparky27]

From your profile. Just curious if it was a license classification there.

 

[GatewaySparky]

So maybe set a 4 space ML panel at the furnace supplied by the 60. Use a 60 amp breaker in it to supply the heat strip and a 30 breaker the supply the condensing unit outside since they are non coincidental loads.

 

[vasparky27]

Oh yeah we pulled ser cable for attic lights and service recps. Probably not the cheapest way.

 

[electricmalone]

Oh yeah we pulled ser cable for attic lights and service recps. Probably not the cheapest way.

You Hawaiian electricians do things very different(from what I'm told)... One of our guys at work just moved back from Kauai, I think he wishes he never left there. Man oh man is he "different"

 

[vasparky27]

Im on Kauai. The jobs I was referring to were done in Virginia.

 

[vasparky27]

They do indeed do things diffrently. Im planning on moving back too Va. next month so I dont have too change my name too KauaiSparky27.