Equipment with CMA, CMOP

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tshephard

Member
I am requesting help(or conformation)that I am doing my first multi-motor/combination equipment correctly.
The outdoor unit for a multi fan, multi (staged) compressor commercial AC unit says:"CMA (Circuit minimum amps)114.38 amps and CMOP (Circuit maximum overcurrent protection) 150 amps.
430.25 "conductor ampacity not less than marked MCA".
(2 RLA and 2 FLA add to about 96 amps.)
Do I use the 114 with no factors (#2 THHN) beause the manufacturer already factored or do I 115% or 125% this number? (I think not, please confirm)
Thanks
 
bob

bob

Senior Member
Location
Alabama
Re: Equipment with CMA, CMOP

I agree that the 125% is included in the CMA rating, but I think the MOC is too low. It should be about 225 amps. You should check that name plate rating again.

[ May 27, 2003, 05:11 PM: Message edited by: bob ]
 
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tshephard

Member
Re: Equipment with CMA, CMOP

The data is correct, 114 and 150 max.
Thanks for replies.
The thing also has weird breakers, like 66 and 69 amps (marked) for the compressors.
I started the job today and ran 1 1/4 conduit that could handle this size and 2 sizes up, just in case.
 
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bennie

Esteemed Member
Re: Equipment with CMA, CMOP

Is this equipment made in Europe? or somewhere out side the US?

Verify the frequency, and voltage.
 
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