Not advised, but it is allowed.
If one were to install a sub panel that fed only phase to phase loads is it acceptable to run the sub with only phase conductors and an ECG?
Safety issue, or just poor future planning?
I can't see a safety issue with it either and when you consider a single conductor could cost well over $100 it would make sense to negate the nuetral if it is not necessary.
soooooooo..... why do i need neutral at a switch location that isn't being used??
As the others have stated it is a design issue.
Most of our 208/120 panels have a neutral, but quite a few 480/277 panels for HVAC/motor loads only do not.
'Cause the code says so (unless the wiring method or the construction allows adding it later.)soooooooo..... why do i need neutral at a switch location that isn't being used??
This rule was changed becaused many of the timers, occupancy sensors etc, utilize the egc for their electronics. Since this is become a more common item I guess they didn't want a lot of current on the egc.
I noticed a timer at Lowes just last week that needed the neutral. I suspect the manufactures will start producing their units that way.than the NEC should require those to be on the neutral, LETS GO YANKEES
Wankster,
Listen, it is good forum etiquette to share in the savings....if you get what I am $aying.
Is it still considered a 480/277 panel then? Or just 480?
Good question. If the 3-wire, 480 volt supply originates at a 480Y/277 volt source then the 3-wire panel will still have 277 volts to ground.