[Villycfl]

Hey guys, thanks to anyone that can assist. I just moved into a home and trying to set my welder up, however, It appears I have to do some electrical work and add an outlet for my welder. The plug on my welder is rated for 50amps. The service manual states it can run on a 30amp breaker, yet recommends a 50amp breaker. My homes main panel has a duel 60amp breaker that runs outside to a sub panel near my pavilion. I would like to build my workshop from this existing pavilion and add an outlet to run my welder near this sub panel. Any onsite on how I would accomplish this task would be much appreciated. Attached are photos of my main panel and sub panel. If you need any more information, I can happily provide that. Thank you

 

[joed]

I would add a 50 amp breaker into the sub panel and connect your welder receptacle from there.
Add whatever 15 or 20 amp circuits you need for your to the panel.

 

[de-nagorg]

What was this outside sub-panel installed to run?

Put your 50 amp breaker there, and add the proper outlet for the welder nearby.

Weatherproof, until you get a building around it.


ED

 

[Villycfl]

Thanks for the help guys. Sounds like like a pretty simple process from here. Thanks for putting my mind at ease.

 

[J. V.]

Thanks for the help guys. Sounds like like a pretty simple process from here. Thanks for putting my mind at ease.

Sounds like the previous owner did this just for you!
You lucked out.

 

[Wiredindallas]

FYI, remember that you do not need a neutral, just 2 hots and a ground. #8 wire is fine, #6 even better.

 

[betelgeuse]

FYI, remember that you do not need a neutral, just 2 hots and a ground. #8 wire is fine, #6 even better.

He said "The service manual states it can run on a 30amp breaker"
He doesn't need #8 wire.



Wire sized to welders are based on the duty cycles of the welders.
The full load amps on the welder nameplate is reduced by a percentage of the total.

100% duty cycle would be 1.00
90 ------- 0.95
80 ------- 0.89
70 --------0.84
60 ------- 0.78
50 --------0.71
40 ------- 0.63
30 --------0.55
20 or less 0.45
He needs #10 at the most, #14 at the least

 

[Oldmaster]

Use minimum #8 copper if protected at 50 amp. If in conduit you can use #8 for the phases and #10 for the ground.

 

[betelgeuse]

Use minimum #8 copper if protected at 50 amp. If in conduit you can use #8 for the phases and #10 for the ground.

Motor, AC Equipment, and Welders don't use the same amperage calculations as general circuits. They modify them



2017 NEC
630.12 Overcurrent Protection
(B) For Conductors. Conductors that supply one or more welders shall be protected by an overcurrent device rated or set at not more than 200 percent of the conductor ampacity.

 

[Oldmaster]

I'm just agreeing with the manufacturers recommendation.

 

[Wiredindallas]

All stated is true specifically for a welder, but I would wire for the rating of the receptacle since it will be there even if the welder isn't.

 

[betelgeuse]

Villycfl, could you give us the brand and model # of the welder?

 

[Villycfl]

Villycfl, could you give us the brand and model # of the welder?

The welder is an ESAB EMP215ic
Model # 0558 102 240

 

[betelgeuse]

The manual recommends 2.5sq.mm wire.

It works out to be a #13, which is not an NEC recognized gauge, so a #12 gauge would be more than enough.