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Low Earth Orbit
Lighting & Electrical
Lighting system causes buzz/hum in the circuit breaker panels
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<blockquote data-quote="Mike Caldwell" data-source="post: 63848" data-attributes="member: 170"><p>Re: Lighting system causes buzz/hum in the circuit breaker panels</p><p></p><p>Just wanted to follow up on what became of this issue and the fix.</p><p>There were multiple problems contributing to noise in the system and the buzzing directly from the breaker</p><p>panels all from improper electrical wiring and the power service to the building. The building power service is delta three phase with the 208v. "wild leg"</p><p></p><p>The power company was called and sent a crew to check the delta three phase service into the building. Of the three transformers feeding the building they found one that was bad and replaced it.</p><p></p><p>The lighting circuits were all wired on to the same phase. Dividing those circuits between the two 120v phases took care of the breaker panel buzz and helped the buzz in the system.</p><p></p><p>In the sub panel feeding the lighting and sound system circuits the bonding screw for ground and neutral was in place and the buss bars had both ground and neutral lines coming from the outlets tied together. removing the bonding screw and separating the grounds and neutrals to their proper buss bars took care of the system buzz completely.</p></blockquote><p></p>
[QUOTE="Mike Caldwell, post: 63848, member: 170"] Re: Lighting system causes buzz/hum in the circuit breaker panels Just wanted to follow up on what became of this issue and the fix. There were multiple problems contributing to noise in the system and the buzzing directly from the breaker panels all from improper electrical wiring and the power service to the building. The building power service is delta three phase with the 208v. "wild leg" The power company was called and sent a crew to check the delta three phase service into the building. Of the three transformers feeding the building they found one that was bad and replaced it. The lighting circuits were all wired on to the same phase. Dividing those circuits between the two 120v phases took care of the breaker panel buzz and helped the buzz in the system. In the sub panel feeding the lighting and sound system circuits the bonding screw for ground and neutral was in place and the buss bars had both ground and neutral lines coming from the outlets tied together. removing the bonding screw and separating the grounds and neutrals to their proper buss bars took care of the system buzz completely. [/QUOTE]
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Lighting system causes buzz/hum in the circuit breaker panels
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