Wiring a 240 Volt Outlet to a Subpanel
#1
09-17-03, 10:57 AM
Wiring a 240 Volt Outlet to a Subpanel
When wiring a 240 volt 2-pole 3-wire grounded outlet (NEMA 6-20R) to a subpanel does the ground wire attach to the grounded circuit conductor (neutral) bar or the equipment ground bar?
#6
09-17-03, 02:44 PM
Member
For all panels in all locations at all voltages on all circuits, it can never be wrong to attach the equipment grounding conductor to the grounding bar.
Note that you can get into trouble with the term "ground wire" since it may be ambiguous as to what you are referring to. In this case, it seems obvious that you are referring to the equipment grounding conductor, but in other circumstances it might not be clear whether you mean the (1) grounding electrode conductor, (2) the equipment grounding conductor, or the (3) grounded conductor.
Note that you can get into trouble with the term "ground wire" since it may be ambiguous as to what you are referring to. In this case, it seems obvious that you are referring to the equipment grounding conductor, but in other circumstances it might not be clear whether you mean the (1) grounding electrode conductor, (2) the equipment grounding conductor, or the (3) grounded conductor.
#7
09-18-03, 05:28 AM
Thanks for the info.
Since I'm connecting the circuit to a subpanel with the neutral separated from the ground I wasn't sure... plus I was getting conflicting answers from peolple that should know.
I did some research and now I understand why the equipment ground is separated from the neutral. For a good explanation check out: http://www.ecmweb.com/ar/electric_code_forum_4/
I also learned that 240 volt AC circuits use the opposite hot wires as returns because they run out of phase.
Know I can hook up the table saw and start working on the stuff the wife wants instead of "Fooling around in my shop!"
Since I'm connecting the circuit to a subpanel with the neutral separated from the ground I wasn't sure... plus I was getting conflicting answers from peolple that should know.
I did some research and now I understand why the equipment ground is separated from the neutral. For a good explanation check out: http://www.ecmweb.com/ar/electric_code_forum_4/
I also learned that 240 volt AC circuits use the opposite hot wires as returns because they run out of phase.
Know I can hook up the table saw and start working on the stuff the wife wants instead of "Fooling around in my shop!"
