12-2 on 25 amp 2 pole A/C

[Mr. Tuttle]

Can a 12-2 NM be on a 2 pole 25 amp breaker?

 

[480sparky]

Nothing says it can't.

 

[petersonra]

Can a 12-2 NM be on a 2 pole 25 amp breaker?

does the 12-2 NM extend outside?

 

[A/A Fuel GTX]

Guessing it's related to an AC condenser unit disconnect. Sure, it's done all the time based on 240.4(G). You will however get arguements pertaining to running NM-B into an exterior disconnect based on 334.12(B)(4). It's done all the time in relation to AC disconnects and exterior mounted loadcenters typically for homes on slabs.

 

[480sparky]

does the 12-2 NM extend outside?

Legal in a disco.

 

[infinity]

Can a 12-2 NM be on a 2 pole 25 amp breaker?

It could even be on a 30 or 35 amp breaker if the MCA were 20 amps or less.

 

[Mr. Tuttle]

240.4(G)

240.4(G)

Here is the exact wording from a large national relocating inspection company on the report for the electrical

"OVERSIZED BREAKER PRESENT AT THE MAIN SUB PANEL, AC BREAKER #12 WIRE ON 25 AMP DOUBLE POLEBREAKER. WHEN A BREAKER IS OVERSIZED FOR THE RATED CAPACITY OF THE WIRE, THE WIRE WILL OVERHEAT
WHEN THE CIRCUIT IS OVERDRAWN."

 

[raider1]

Here is the exact wording from a large national relocating inspection company on the report for the electrical

"OVERSIZED BREAKER PRESENT AT THE MAIN SUB PANEL, AC BREAKER #12 WIRE ON 25 AMP DOUBLE POLEBREAKER. WHEN A BREAKER IS OVERSIZED FOR THE RATED CAPACITY OF THE WIRE, THE WIRE WILL OVERHEAT
WHEN THE CIRCUIT IS OVERDRAWN."

The circuit breaker is not oversized provided that it does not exceed the maximum overcurrent protective device rating marked on the AC nameplate. It is very common to have an AC unit that has a minimum circuit ampacity of around 16 amps and a marked Max overcurrent device rating of 25 amps.

This inspection company would do well to study Article 440 in regards to AC units before they make a statement like they did.

Chris

 

[jxofaltrds]

Can a 12-2 NM be on a 2 pole 25 amp breaker?

Others have answered but how do you respond if you have no code/reference?

Hard to challenge the Expert Home Inspector!

http://dsps.wi.gov/sb/SB-ElectricalAct63LegisExplan0708.html

 

[480sparky]

Others have answered but how do you respond if you have no code/reference?
http://dsps.wi.gov/sb/SB-ElectricalAct63LegisExplan0708.html

I would respond, "Code reference, please....."

 

[Gregg Harris]

I would respond, "Code reference, please....."

X2

 

[infinity]

Here is the exact wording from a large national relocating inspection company on the report for the electrical

"OVERSIZED BREAKER PRESENT AT THE MAIN SUB PANEL, AC BREAKER #12 WIRE ON 25 AMP DOUBLE POLEBREAKER. WHEN A BREAKER IS OVERSIZED FOR THE RATED CAPACITY OF THE WIRE, THE WIRE WILL OVERHEAT
WHEN THE CIRCUIT IS OVERDRAWN."

As others have stated the author of this needs to brush up on their code. :roll: