[Amps] what is a 4 wire 240VAC service?

[Jim Brown]

On 4/3/2011 2:12 PM, Its from KE4VYN wrote:
> A bare copper wire called the ground,

Actually, there is no requirement that the ground be bare -- but there 
IS a requirement that if it is insulated it must be green (or taped 
green at exposed points).  In many jurisdictions, electrical codes allow 
properly installed steel conduit to substitute for a dedicated green 
wire. Some jurisdictions require steel conduit PLUS a green wire. 
Isolated ground systems REQUIRE a green wire to each outlet.

Otherwise Lee's post is right on target.

73, Jim K9YC