Mathematics, 05.08.2021 01:00 barn01

An installation consists of a 30-kVA, 3-phase transformer, a 480-volt primary, and a 240-volt secondary. Calculate the largest standard size circuit breaker permitted for primary-only protection to be used without applying Note 1 of Table 450.3(B)

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An installation consists of a 30-kVA, 3-phase transformer, a 480-volt primary, and a 240-volt second...