sizing breaker and wire for this welding machine

Cartoon1 · 2024-10-28T14:05:01-0400

I have a Ironman 240 Welding machine. I have a 240V system. I'm thinking of putting a 50A amp breaker with #8 copper 75C rating. Information below. Should i up size the breaker for startup current? Also, should i upsize cable to #6 because it is technically 50.8 and not 50?

Performance Data:

Rated Output: 200 A at 24 VDC, 60% duty cycle
Open Circuit Voltage: 40 VDC
Amperes Input at Rated Load (208 V / 240 V): 57.0 / 50.8
KVA / KW: 11.4 / 7.1

Thank you

charlie b · 2024-10-28T14:14:47-0400

Is this your own equipment?

Cartoon1 · 2024-10-28T14:15:31-0400

charlie b said:
Is this your own equipment?

No, this is a owner equipment they wish to install.

petersonra · 2024-10-28T15:04:37-0400

I think there are some special rules for conductor sizing for welders. I would be looking in article 630.

sizing breaker and wire for this welding machine

Cartoon1

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charlie b

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Cartoon1

Senior Member

petersonra

Senior Member