3 Phase/1 Phase Wiring Question - Electrician Talk - Professional Electrical Contractors Forum

tony417 · 10-25-2010, 08:50 PM

I have a woodworking machine that has a single phase motor. The machine has a socket mounted on its side so that a power feeder can be mounted and plugged in. However, for reasons that probably relate to ease of manufacturing (this particular machine is often manufactured with a 3 phase motor), that socket is a 3 phase socket, and when I open it up is fully wired for 3 phase (earth, neutral, L1, L2, L3). Also, the machine is used in my basement and I am 99.9% sure that I don't even have 3 phase power in my home.

My power feeder, which is single phase, has the standard 3 wire configuration, one ground and 2 hot.

How should I wire the power feeder into the mating side of the 3 phase receptical so that it will work correctly? Can I just wire the ground to earth and then wire the 2 hot wires into L1, L2 and L3 until a combination gets the feeder to work? Is there any risk in this procedure to either me or the machine(s).

Thanks for advice.

Tony.

mcclary's electrical · 10-25-2010, 08:56 PM

Quote:

Originally Posted by tony417

I have a woodworking machine that has a single phase motor. The machine has a socket mounted on its side so that a power feeder can be mounted and plugged in. However, for reasons that probably relate to ease of manufacturing (this particular machine is often manufactured with a 3 phase motor), that socket is a 3 phase socket, and when I open it up is fully wired for 3 phase (earth, neutral, L1, L2, L3). Also, the machine is used in my basement and I am 99.9% sure that I don't even have 3 phase power in my home.

My power feeder, which is single phase, has the standard 3 wire configuration, one ground and 2 hot.

How should I wire the power feeder into the mating side of the 3 phase receptical so that it will work correctly? Can I just wire the ground to earth and then wire the 2 hot wires into L1, L2 and L3 until a combination gets the feeder to work? Is there any risk in this procedure to either me or the machine(s).

Thanks for advice.

Tony.

It sounds like the machine needs a grounded conductor, and your trying to tie into something that does not have one. Hire a professional

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