Your installation specs indicate that a 30 amp breaker is required for 110V service and a 30 amp breaker is also required for 208-230V. Did you mean a 15 amp breaker is required for 208-230V service?

110V Power Units pull roughly 22 amps at maximum load, thus a 25-30 amp breaker is required. 208-230V Power Units pull roughly 27 amps at maximum load, which requires a 30 amp breaker. More.

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