> Black is the "hot" lead, and is the one that you should interrupt.
> In a series circuit, from an academic point of view, it does not
> matter, but from a safety point of view, I should never be able
> to touch a white wire that is hot. (loads of things violate this,
> but that's how it should be)

I've just repaired a couple of US-made vacuum testers. One
had Black-White-Green mains wiring, the other Blue-Blue-
Brown. Is there a standard for the US re colour-coding ? In
NZ it's Brown (A) Blue (N) and Green/Yellow stripe (E). The
striped Earth wire is so that people who are red/green colour-
blind don't confuse the Earth and brown Active

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads