[Boatanchors] AC line plug polarity

[Glen Zook]

To meet NFPA NEC (National Electrical Code) you really need to rewire the unit so that the fused side goes to the switch.  Then connect the black wire from the 3-wire cord to the fuse.  The white wire goes to the other AC connection and the green wire then goes to the chassis.

Glen, K9STH

Website:  http://k9sth.com


--- On Mon, 1/4/10, Barrie Smith <barrie at centric.net> wrote:

I'm working on an old tube-type amplifier, in hopes of using it as a speech-amplifier.
 
The unit doesn't have a line cord.  It has a terminal strip that takes care of all the ins-and-outs.
 
It was built in the 1940s, so the AC in is just two terminals.  I'm thinking of placing a three wire cord on it so that the chassis is grounded.
 
Fortunately, I have a schematic which shows one side of the AC switched, and the other side fused.  Neither side of the AC is grounded, although the fused side has a .1 cap to ground after the fuse.
 
The question is:  Where should I place the hot and neutral wires?