Double tap transformer?

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greenspark1

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New England
Hello,
I have a 45kVA 600-480/277V step down transformer I'm using for a Canadian job. I typically have one transformer feed one load, but here I have two 480V loads with integral CBs in the same small room of the transformer. I would like to bring two sets of wires from the transformer, one to each of these loads (a panel and a piece of equipment). Each load has its own integral CB. Reading 240.21 is making me crossed eyes and I'm not clear if this is technically a 'tap' or not. I would size each set of conductors based on the equipment it's feeding. Any help if this is permitted? Thanks!
 
greenspark1 said:
Hello,
I have a 45kVA 600-480/277V step down transformer I'm using for a Canadian job. I typically have one transformer feed one load, but here I have two 480V loads with integral CBs in the same small room of the transformer. I would like to bring two sets of wires from the transformer, one to each of these loads (a panel and a piece of equipment). Each load has its own integral CB. Reading 240.21 is making me crossed eyes and I'm not clear if this is technically a 'tap' or not. I would size each set of conductors based on the equipment it's feeding. Any help if this is permitted? Thanks!
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Under the NEC, you can run individual sets of conductors to multiple loads from the secondary of a transformer. Each set must comply with the requirements of 240.21(C). Also, the transformer protection must comply with 450.3(B).

(I don't know what the Canadian code would require.)
 
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