I work in an industrial plant. We have many 480 volt portable welders that are plugged into column mounted 60 amp receptacles. My question is this; Is it permissible to size the flexible cord by the amp draw of the welder (19 amps) or is it necessary to size it to 60 amps? I am referencing article 240- section 5 but the table only goes to 50 amps. Thanks for your time.
Portable Welders
- Thread starter emtech
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- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Portable Welders
Have you looked at Article 630 Welders?
Have you looked at Article 630 Welders?
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: Portable Welders
"Instrumentation and Control." Isn't this a bit out of your area of specialization? What are you being asked to do?
"Instrumentation and Control." Isn't this a bit out of your area of specialization? What are you being asked to do?
Re: Portable Welders
Instrument and Control is just what the company calls both the electricians and actual I & C techs. I am a state licensed master electrician. The question stems from one of the engineers wanting us to use #4 so cord on the plugs. I feel this may be overkill and was looking for something more specific in the code book. Thanks.
Instrument and Control is just what the company calls both the electricians and actual I & C techs. I am a state licensed master electrician. The question stems from one of the engineers wanting us to use #4 so cord on the plugs. I feel this may be overkill and was looking for something more specific in the code book. Thanks.
Re: Portable Welders
I am assuming these are portable welders used primarily for maintenance type work or new construction. If you read 630.11 or 630.31, IMO you would not need supply conductors rated higher than the rated primary conductors.
BTW if column mounted receptacles are not horse power rated, they should be of the type that they have to be without power to be able to plug or unplug your welders.
I am assuming these are portable welders used primarily for maintenance type work or new construction. If you read 630.11 or 630.31, IMO you would not need supply conductors rated higher than the rated primary conductors.
BTW if column mounted receptacles are not horse power rated, they should be of the type that they have to be without power to be able to plug or unplug your welders.
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