Posted: 10/16/2015 9:34:10 AM EDT
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Question 1 of 2. The other will come later. I'm not an electrician so I don't know exactly what info you need, so I will fill in the info as needed.
I unexpectedly bought another lathe (220). I'm not certain that I will keep it, but I do need to power it up to finish testing it, and to show it to a potential buyer if I go that route. I don't want to create a new circuit unless I decide to keep it and find a permanent spot in the shop. Is there any reason I can't use the correct plug and plug it in my 50a 220 welder receptacle for temporary or semi-permanent power? My current welder run is 6 awg, about 22 feet from the breaker box to receptacle. I just need to use about 4 feet as an extension cord, so I don't think voltage drop should increase THAT much with just 4 extra feet. The run is not in conduit and by memory I think it's THHN. It was professionally installed and inspected and is hooked to a 50a breaker inside a 100a sub-panel. The lathe is 220v, 3.2 amp, 1 hp continuous duty, rated "K" on the info tag. Thanks in advance. __________________________________________________________________________________________________________________ ETA: Just a follow up that everything worked fine. Thanks to those who answered questions. Not so many thanks for those who just try to make themselves look good. |
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At only 3.2A, I don't see any reason why that can't be done. Are you talking about changing the plug on the lathe? Or about replacing the receptacle on the welder's circuit to match the lathe? The lathe was directly wired at its previous location. The wires were snipped when it was removed, so I'm talking about putting a plug on the wires that matches my welder plug, simply for convenience. Unplug welder, plug in lathe, and vice versa. If I keep the lathe and make a permanent location for it I have no problems permanently wiring it directly to the breaker box on its own breaker. I do not want to spend $150 in materials just to power it on a few times if I can help it, but I also want to make sure the over current protection is adequate and safe. |
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See NEC Article 430
Full load current is 8.4 amps (Table 430.248) 1 HP, 230 V Conductors are required to be 125% so 10.5 A Motors have internal thermal protection. They are self protected against thermal overload. Over-current is to protect the feeders against short circuits. While deciding on a permanent location and dedicated circuit just use it. |
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huh? ar-jedi Quoted:
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The run is not in conduit and by memory I think it's THHN. huh? ar-jedi The conductor for my welder circuit isn't in metal conduit and by memory I believe it is THHN. (similar at least) |
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Quoted:
The conductor for my welder circuit isn't in metal conduit and by memory I believe it is THHN. (similar at least) Quoted:
Quoted:
Quoted:
The run is not in conduit and by memory I think it's THHN. huh? ar-jedi The conductor for my welder circuit isn't in metal conduit and by memory I believe it is THHN. (similar at least) THHN is a type of insulation. It is not a type of cable or wiring. |