Well....
I don't know what difference it makes whether you're using a
twofer or not, the electricity doesn't change.
If it's powering a
practical (or a
cue light), technically the
polarity does matter. The contact at the bottom of a
socket should be the hot, and the threads/side of the the lamp
base should be the
neutral.
--Sean
3 weeks ago I would have agreed with you, but after two different battles with practicals with multiple runs of zip
line going into one
dimmer I found that sometimes it does. To give some details we had 3 runs of zip going into one
dimmer two lit right up the other one was at something like 50%. Flipped the
connector and all three light up (Only thing that makes sense to me is that there was
power to the
neutral line making the V
drop over the
line less that 120 VAC). Other one was with two
channel rope light, we did a lot to make that work but in the end found out that the common
neutral was connected to hot and that was our problem.
In both instances if the runs had been on alone on the
dimmer they would have worked fine, but since they were connected to other runs that were connected in the opposite manor they didn't
play nice.
As far as being compliant with
NEC Sec. 200.11. Well I have my own feelings on the matter, but we encourage
safety here so I'll just say good
point.