Engineering, 25.02.2021 06:40 nia454

An installation consists of a 10-kVA, single-phase transformer with a 440-volt primary and a 110-volt, 2-wire secondary using insulation type THWN copper conductors. No secondary OCPD is installed. Calculate the maximum standard size OCPD permitted by table 450.3(B) to protect the primary of the transformer where the secondary conductors are 3 awg THWN copper

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An installation consists of a 10-kVA, single-phase transformer with a 440-volt primary and a 110-vol...