ECN Forum Forums General Topics of the Trade General Discussion Area 120v and 277v in the same box?

I do not see any reason not to mix the two voltages in the same box, as long as the requirements of 200.6(D) are met.

Having one circuit of 277 and another circuit of 120 in the same box is no more dangerous than having two 120 or two 277 volt circuits in the same box.

120 can kill you as quick as 277, you should not work on either live.

When you open a box with multiple conductors you should never assume there is only one circuit contained in that box regardless of the number of supply voltages.

If you can not mix voltages you might as well say you may only have one circuit of any type in a box.

We are 'qualified' personal aren't we?

Bob