50 plug using a 70 amp breaker and 70 amp rated wire

[jbalsamo]

can a 3 pole 4 wire receptacle (15-50r) be used on a 70 amp circuit using a 3 pole 70 amp breaker and #4THHN?

 

[david luchini]

can a 3 pole 4 wire receptacle (15-50r) be used on a 70 amp circuit using a 3 pole 70 amp breaker and #4THHN?

No, this would be a violation of 210.21(B)(1) for a single receptacle circuit or 210.21(B)(3) for a multiple receptacle circuit (unless you meet any of the exceptions therein.)

 

[jbalsamo]

would an exception being a single receptacle for a welding outlet and dedicated use?

 

[david luchini]

would an exception being a single receptacle for a welding outlet and dedicated use?

A dedicated single receptacle for an Arc-welder is one of the exceptions.

 

[jbalsamo]

Thank you!