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azeez akbar

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I Have A Building That Someone Installed #3/0 Copper To The 3 Ph. 200 Amp Disconnect.
From The 200 Amp 3 Fues Installed #2 Copper To The 3 Ph. 200 Amp Sub. Panel Breaker.

The 200 Amp. Sub Panel Has 8 30 Amp. 2 Ploe A C Breaker.

The 200 Amp. 3 Ph. Breaker Keep Tripp[ng.

Is The Wire Too Small?
 
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azeez akbar said:
I Have A Building That Someone Installed #3/0 Copper To The 3 Ph. 200 Amp Disconnect.
From The 200 Amp 3 Fues Installed #2 Copper To The 3 Ph. 200 Amp Sub. Panel Breaker.

The 200 Amp. Sub Panel Has 8 30 Amp. 2 Ploe A C Breaker.

The 200 Amp. 3 Ph. Breaker Keep Tripp[ng.

Is The Wire Too Small?
Click to expand...

before this gets locked.....the answer is no.....but feel free to put in a larger breaker, tell us how it works out for you...
 
azeez akbar said:
The 200 Amp. Sub Panel Has 8 30 Amp. 2 Ploe A C Breaker.
Click to expand...
AC breaker as in "air conditioning" or AC as in the A and C phase, like you'd do in an I-Line panel? Not so sure I'd put all that load just two of the phases. That's just silly.
 
Yes the wire is too small. The #2 conductors feeding the panel and fused at 200 amps are too small.
 
I am not certain of the installation. Sounds like there are 3 fues (fuses????) --- Are they 100 amp fuses???? The main breaker is blow but not the 100 amp fuses????

What is the load of the a/c units? And as Marc has asked are they all on phases A and C? Lots of questions no response.
 
It appears to me that IF there are 200A fuses in the fused disconnect, than the #2 wire is smaller than code permits.

Why someone would go to the trouble to put in a fused disconnect to feed a circuit breaker is not clear. One wonders if at some time the 200A fuses were smaller.
 
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petersonra said:
It appears to me that IF there are 200A fuses in the fused disconnect, than the #2 wire is smaller than code permits.

Why someone would go to the trouble to put in a fused disconnect to feed a circuit breaker is not clear. One wonders if at some time the 200A fuses were smaller.
Click to expand...

I don't read anything in the OP's question that states a 200 amp fuse. He may mean that but he isn't saying it.
 
I agree with the above, I would like a little clarification and specifics about the air conditioners and surrounding installation before we would able to say anything absolutely correct about the installation, IMO.
 
Dennis Alwon said:
I don't read anything in the OP's question that states a 200 amp fuse. He may mean that but he isn't saying it.
Click to expand...

From The 200 Amp 3 Fues Installed #2 Copper To The 3 Ph. 200 Amp Sub. Panel Breaker.
Click to expand...

I took that to mean 200A fuses, but they could be smaller fuses of the 200A size.
 
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