I'm not quite sure what you are talking about. Is there basically an
extension cord which terminates with a 3 gang box and this 3 gang box has 3
regular duplex electrical outlets (3 prong), and the plug on the extension
cord is 3 prong, and you have looked inside the 3 gang box and are wondering
if it is wired correctly so far as the grounding goes?

Anyway the proper way to wire the grounding wires to a 3 gang box with 3
outlets would be to have a separate grounding wire or "pig tail" going to
each outlet grounding screw, then use a wire nut or crimp connector to
connect the 3 grounding wires with the ground wire on the power cable. Also
to have a 5th wire screwed to the 3 gang box if it is metal.

And code or rules aside, it does not work very well to try to firmly connect
two or more wires to one screw. One wire can be firmly held in place, but
with two or more, they will tend to come loose or you may have a difficult
time trying to get them to stay put. Much easier and better to just use one
wire per screw and then wire nuts/crimp connectors.


"Keith Boeheim" wrote in message
I am wiring for a home theater. Included is a 3 gang box with 3 duplex
recepticles. There is a feed coming into the box and a line out to power
another duplex receptical. My question is when grounding the 3 recepticles
is it legal or (proper) to have more that one wire on a grounding screw?

Thanks for any help.

kb