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Electrical Inspections Contains discussions about electrical systems. This includes receptacles, panels, wiring, etc.

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  #1  
Old 6/6/09, 12:15 PM
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Default 50 amp breaker...what size wire?

Amps........Copper........Alum
======================
40.............8 ga..........6 ga
60.............6 ga..........4 ga

What size for 50 amps? Does it remain at 8 and 6?



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  #2  
Old 6/6/09, 12:18 PM
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Wayne B. Wilson Wayne B. Wilson is offline
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Default Re: 50 amp breaker...what size wire?

I would always go to the next size up. But that is what i do
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Old 6/6/09, 12:38 PM
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Default Re: 50 amp breaker...what size wire?

Most 6 gauge copper is only good for 55 amps due to the temperature rating but its allowed for 60 around here since you can rarely see the specs on the sheathing.



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Old 6/6/09, 1:11 PM
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Wayne B. Wilson Wayne B. Wilson is offline
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Default Re: 50 amp breaker...what size wire?

Rule of thumb 125% should be used
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Old 6/6/09, 1:18 PM
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Default Re: 50 amp breaker...what size wire?

So, 12 AWG is not good. Cause that's what I found.



“The things that will destroy America are peace at any price,
prosperity at any cost, safety first instead of duty first,
the love of soft living, and the get-rich-quick theory of life.”
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Joe Funderburk, CBO, CMI
Alpha & Omega Home Inspections, LLC
Inspecting Upstate SC & Charlotte Metro, NC
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Old 6/6/09, 1:23 PM
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Wayne B. Wilson Wayne B. Wilson is offline
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Default Re: 50 amp breaker...what size wire?

LOLOL you have to be kidding
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Old 6/6/09, 3:04 PM
Larry Kage, CMI Larry Kage, CMI is offline
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Default Re: 50 amp breaker...what size wire?

I think it's okay. I'm sure they're just trying to pre-melt it for recycling.



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Old 6/6/09, 4:03 PM
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Default Re: 50 amp breaker...what size wire?

Joe, there are many factors involved, for instance #8 CU THHN is good for 50 amps but 8/3 Romex is not, you would need 6/3 if Romex. Also, there are applications where #12 would be acceptable on a 50 amp circuit, for example a tap on a cooking appliance circuit (210.19(A)exception No 1), or a motor circuit where overload protection is provided at the motor.
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