[Amps] Safety grounding - was Mains Isolation Transformer

[Gudguyham at aol.com]

In a message dated 7/4/2006 1:26:43 P.M. Eastern Standard Time, r at somis.org  
writes:

Newer  electric range plugs and sockets have  4-conductors.




Yes, as they should.  They have 120v requirements hence the neutral  wire is 
needed making it a 4 wire system.