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Does an electric jockey pump electrical breaker need a breaker lock?

Question asked by amaness on Oct 17, 2016

I am in the process of doing an acceptance test on a sprinkler system that has a diesel fire pump.  The diesel fire pump is capable of pumping 5000 gallons per minute, to keep this diesel pump from coming on for every loss or fluctuation in pressure there is an electric jockey pump.  Does the electric jockey pump electrical breaker switch need a lock?

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