wbalsam1
Senior Member
- Location
- Upper Jay, NY
An electrician friend of mine described a recent discovery of a wiring condition that exists on a job where he was called to troubleshoot something else.
The original electrician wired fluorescent lighting branch circuits out of a 3-phase load center in this manner: a red with it's own neutral, a blue with it's own neutral and a black with it's own neutral. These conductors were in conduit and routed up into a dropped ceiling void and then went to a junction box where all the neutrals were twisted together under a big blue wirenut and connected to AC cables going to the different lighting fixtures. (in other words, the fixture neutrals and BC neutrals are all grouped together under one huge wirenut).
The whole clothing store's lighting was done this way and has been working for twenty years without a problem.
Must be a heck of a load spark present when you untwist a big blue, heh? :-?
The original electrician wired fluorescent lighting branch circuits out of a 3-phase load center in this manner: a red with it's own neutral, a blue with it's own neutral and a black with it's own neutral. These conductors were in conduit and routed up into a dropped ceiling void and then went to a junction box where all the neutrals were twisted together under a big blue wirenut and connected to AC cables going to the different lighting fixtures. (in other words, the fixture neutrals and BC neutrals are all grouped together under one huge wirenut).
The whole clothing store's lighting was done this way and has been working for twenty years without a problem.
Must be a heck of a load spark present when you untwist a big blue, heh? :-?
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