Transformers

[angelojames62718]

What size wire should be used for a 45kva to feed a 208/120 panel

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[augie47]

Not enough information. What size is the main in panel ?
(With your being a new user we would prefer you tell us the size you determine and anyone here will be glad to confirm and discuss)

 

[angelojames62718]

The main is 480 and the wire size is number 4

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[augie47]

Not exactly what we need
How about this: Primary Breaker size in amps_______ Primary conductor size________
Secondary panel main breaker size in amps_______ Transformer secondary conductor size_________

 

[infinity]

As Augie stated more information is needed. I believe that we would typically feed a 125 amp OCPD.