MC Cable Ampacity

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SiddMartin

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I am pulling a 100A feeder in MC Cable and I'm trying to find what size wire I need.
Following 330.80, directing me to T310.16, I believe I should follow 75 degree column which would be #4 (good for 85 amps / using 240.6 to up size breaker to 100)


am I correct in this?

Thank you
 
SiddMartin said:
Following 330.80, directing me to T310.16, I believe I should follow 75 degree column which would be #4 (good for 85 amps / using 240.6 to up size breaker to 100)
Click to expand...

What happened to the 90A CB? [240.6....240.4(B) is the increase article]


EDIT:
You might also want to drop in on this thread in progress:
Over current protection
 
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celtic said:
What happened to the 90A CB? [240.6....240.4(B) is the increase article]
Click to expand...

Actually, I was looking at 240.6 to get the 100, and had a brain fart not seeing 90 :-?

So, now we are up to #3 MC, correct?

I can not use the 90 degree, because of the term. on the breaker only being for 70
 
Yes, if you need the full 100 amp capacity you'll have to go up to a #3 AWG with 75 degree C terminations.
 
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