Which prongs are hot ground and neutral in a 4-prong 240V plug?

Answer the round prong is the ground, the side prongs are hot and the top prong is neutral Answer The "Hot" Terminal screws are Brass colored. The "neutral" is silver and the "Ground" is green. Please be careful!

Per National Electrical Code, a circuit ground has to be either the raceway itself, or ins…talled in the same raceway as the hot conductors. In regards to Romex, this means your ground must be part of the same cable. If you had an extra non-ground conductor, you could re-identify it green and use it as ground, but it doesn't seem like you do.

? Answer? You can, but it doesn't meet code.

The best option is to run new wire. If you can't, go with your separate ground wire. It is hackish, but it does work.

If this is for a dryer or range, they do sell 3 prong cords for old work. You can ground your appliance directly with the fourth wire. Same result, and a little better than hacking the outlet.? ----?

If you do not understand the work well enough to accomplish it yourself properly and safely, don't try it.

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