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Low Earth Orbit
Lighting & Electrical
Electrical Riddle
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<blockquote data-quote="Andrew Broughton" data-source="post: 30936" data-attributes="member: 318"><p>Re: Electrical Riddle</p><p></p><p>My guess is that a 3-phase breaker panel was installed, so one buss is not getting any power, or that a proper panel was installed, but with one buss disconnected. With one buss floating the low voltage going to some lights are the result of the connected hot going through some 240v device (that isn't working but has resistance across the two hots) and feeding the disconnected buss backwards. This could be verified by turning off the breakers to any 240v devices and the dim lights would go out. Reading 0v between the 2 hots means they are on the same phase, but that's 2 problems and you said it was solved by one fix, so I'm stumped there.</p></blockquote><p></p>
[QUOTE="Andrew Broughton, post: 30936, member: 318"] Re: Electrical Riddle My guess is that a 3-phase breaker panel was installed, so one buss is not getting any power, or that a proper panel was installed, but with one buss disconnected. With one buss floating the low voltage going to some lights are the result of the connected hot going through some 240v device (that isn't working but has resistance across the two hots) and feeding the disconnected buss backwards. This could be verified by turning off the breakers to any 240v devices and the dim lights would go out. Reading 0v between the 2 hots means they are on the same phase, but that's 2 problems and you said it was solved by one fix, so I'm stumped there. [/QUOTE]
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