ECN Forum Forums General Topics of the Trade General Discussion Area Resi light circuits

Bob: You've told me that before, and I find it interesting about your amendments. I find it particularly interesting that electrons move slower in Massachussettes than any other state in the nation , such as evident by the 310.15(?) or 310.16(?) amendment for conductor ampacity.

Ryan I was curious about the change in derating here in MA and Don R hooked me up.

The table we use was the table from the NEC and you can still see it in Annex B Table B.310.11

The difference is we still consider load diversity and the NEC no longer does.

The remarking issue is more about "if you do not know what your doing keep your fingers out of electric boxes"

As a matter of preference, I almost always bring power in at the switch. I generally use a 3 conductor cable between the switch and the ceiling box, to allow for future wiring of a fan/light with independent control. For a standard switch installation, I just cap off the red wire at both ends.

Yes, "Twin & Earth" with two red wires instead of red/black has been available for quite a while in the smaller 1 and 1.5mm sizes used for lighting circuits. It doesn't seem to be that widely used, though.