I'm working in a private residential shop. The owner has a Miller T-Bolt XL AC/DC welder 240 volt...70 amps input max....20% DCycle. Flex cable whip ...no plug. Wants it cord and plug connected. Instructions say can be either hardwired or cord and plug. Miller tech line says it can be treated as an arc welder subject to ART. 630.
Ok, can I install a 6-50P and matching receptacle for this welder? I am looking at 210.21 (B) excpt. #2 for making this compliant.
I'm calculating 35 amps minimum ampacity for the branch circuit conductors 75C verified at both termination points. Also calculating a max. breaker of 70 amps [200%(35)].
My initial thoughts are # 8 THHN cu in pvc and a 70 amp OCPD. Am I on base or out in left field...
Stubbie
Ok, can I install a 6-50P and matching receptacle for this welder? I am looking at 210.21 (B) excpt. #2 for making this compliant.
I'm calculating 35 amps minimum ampacity for the branch circuit conductors 75C verified at both termination points. Also calculating a max. breaker of 70 amps [200%(35)].
My initial thoughts are # 8 THHN cu in pvc and a 70 amp OCPD. Am I on base or out in left field...
Stubbie
