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  #31 (permalink)  
Old 10-15-2010, 02:51 AM
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Originally Posted by adantessr
Whoah hoss . Back up just a bit. What was said is that you have to match the wire gauge from the breaker to the amperage of the breaker . If you are going to use a 50 amp breaker you have to use 6 gauge wire from the breaker to the outlet and use a 50 amp outlet . If you are going to use a 40 amp breaker then you need to run 8 gauge wire to the outlet from the breaker . A 30 amp breaker will require 10 gauge wire from the breaker to the oulet . What size wire you use on the plug from the outlet to the device depends on the current draw of the device . The larger gauge wire going to the outlet is not going to force more electricity to the device , or as you said "put a serious hurtin on that 12 gauge cord ".

Ahhh ok..thanks for clearing up my BRAIN FART...lol..i was thinking it was said a 6 gauge extension cord had to be used...lol..my bad!

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Old 02-02-2016, 10:21 AM
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Originally Posted by OLNOLAN View Post
First off the information I supplied to HotRodMan is for a permanent installation in his garage that I know he will never have any problems with. Safe advise. 50 amp supply, 50 amp wiring, 50 amp receptacle. No fudging.

If anyone is interested in how ampacity of the supply conductors can be sized, or how the primary overcurrent can be sized in accordance with the NEC, read Article 630, it explains what is permissible. The primary overcurrent device sizing and supply conductor sizing recommended in the Lincoln manual appears to be in accordance with what is allowable in NEC Article 630.

Hint- It involves Duty Cycle. In todays litigious society, I choose to NOT recommend what you can get away with or what you can fudge on.

Emailed Miller with my question, here is the answer:


"We actually recommend a 30 amp breaker for the MM180. It has a 50 amp style plug on it in an effort to keep the plugs on our machines consistent. You could wire a 50 amp receptical to your 30 amp service, the plug will just be oversized for the application. We do not make any off the shelf pigtails to go from the 50 amp style plug to the 30 amp style plug, you would have to make one"

David Miller
Service Technician
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