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  1. jacka

    Requirement for transformer oil pit

    Yes, according to NEC Article 450 for any building and/ or indoor installations (assuming NEC applies).
  2. jacka

    Power Distribution

    Is the main service 200 or 400 amps? Assuming you have 400 amp. service I recommend you replace your main panelboard with a 400amp MCB panelboard that is equipped with 1-200amp circuit breaker and 2-100amp circuit breakers. You can use the circuit breakers to feed whatever building you want...
  3. jacka

    480 VAC Transformer Question

    To peterp: You chose 90A fuse or C.B. for secondary, according to NEC table 450-3(b) the secondary protection should be 250% of 54.13A = 135.3A, why not use 125, 110, 100 or 90A fuse or C.B.?

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