On Wednesday, July 23, 2014 5:56:15 PM UTC-4, amdx wrote:

"Overhead commercial lighting voltage is 277 so its less current and

less dangerous,"

So to rephrase you said, 277 volts is less dangerous than a lower voltage.

Do you still think this?

No, not if your high voltage lighting branches (brown, orange or yellow phases) are from a service or from a transformer arrangement different from your low voltage receptacles branches (black, blue, and red phases).

Yes, if transformed 277vac and 120vac service is all from one service (of, say two phases of 500 kcmil going into the main interface).

And I don't "think" this. Its in the NEC