Take the tour ×  This is the receptacle I'm trying to wire. The
ground says green next to it, but the other two wire inputs
don't say anything. I need to know which is positive and
negative. there is no + or - the screws are not different
colors. No indicators at all. I would appreciate any help.
enter image description here  share|improve this question AC
circuits don't have + or -, they have hot or neutral. And I
believe for your receptacle in the US, both sides are hot, so it
wouldn't matter which hot wire goes to which side. But I am not
an electrician. –  Henry Jackson Sep 7 at 16:06 add comment  1
Answer  up vote 5 down vote accepted  Assuming you mean this
6-30R:  enter image description here  After you wire the green
(ground, not neutral), it doesn't matter which of the two
ungrounded (hot) wires are placed on the 2 'flat' blades. 240VAC
(in the North American split single phase) is not polarized with
respect to ground, because the neutral is not being used.  This
connector can also be used with 2 ho