Come to think of it, I believe I've seen some old BS546 plugs like that too. Pretty rare though.
Going back to D.C. wire identification, are any of our Stateside members following this thread?
What would you use for 3-wire D.C. systems? The N.E.C. would require white or gray for the grounded middle wire, so with 3+Gnd. Romex presumably you'd then use red for positive, black for negative. But what about conduit wiring? The same, or maybe blue for negative?
What if a 120/208V system in the same building was already using black/red/blue/ white?
Last edited by pauluk; 07/10/07 01:41 PM. Reason: Typo.
