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Mathematics, 27.04.2021 01:50 alwaysneedhelp8420

An installation consists of a 10-kVA, single-phase transformer with a 440-volt primary and a 110-volt, 2-wire secondary using THWN with copper conductors with no secondary OCPD 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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