breaker/wire size/plug ??

[pete379]

bought a new plasma cutter,looks like it can max draw 70 amps, on single phase 240v. I want to add a dedicated circuit,and plug. any recommendations ?

thanks, pete

 

[W-Cummins]

If you need a 70 amp rated plug your probably looking at a pin and socket plug set $$$ if you can use a 60 amp you can get a nema 15-60p setup

William....

 

[Norcal]

A 100A pin & sleeve plug & receptacle will be really costly, here are a couple of examples: https://www.grainger.com/Grainger/HUBBELL-WIRING-DEVICEKELLEMS-PinSleeve-Plug-5Z923?Pid=search

https://www.grainger.com/Grainger/HUBBELL-WIRING-DEVICEKELLEMS-PinSleeve-Receptacle-5Z922?Pid=search

These are a high priced example,but give a idea of how costly they are.

 

[Aceman]

bought a new plasma cutter,looks like it can max draw 70 amps, on single phase 240v. I want to add a dedicated circuit,and plug. any recommendations ?

thanks, pete

What's the make and model?

 

[pattenp]

Are you confusing output amps vs draw amps. 70 sounds like the output/cutting amps.

 

[klhitman]

i have a wire sizing chart on my computer at work. i will try to post it when i go in on Monday.

does the cutter already have a whip on it or do you need to make one. SO cable of that size will be pricy!!! you could get it at any welding supply house. i just bought some 8/4 wire for a job i and and it was like 3 bucks a foot.

 

[pete379]

What's the make and model?

hypertherm 85

 

[BFBOB]

You might want to get a book about the NEC. Not the NEC itself; that can be paralyzingly incomprehensible even to pros (like me, albeit a low voltage pro). Audell's has books that are more in tune with answering your questions. I'm sure there are others. Any attuned to household wiring will be guide you with this sort of project.
To second a previous poster's comments, be sure you're aware of the difference between amps of consumption and amps of output. The wiring and breakers you install to supply the welder must at least equal its consumption. Its output is irrelevant.

 

[Greatbear]

They Hypertherm 85 draws 58 amps at 240 volts. You can use the NEMA 15-60P/R plug/receptacle with no problems.

Whatcha cutting up? Battleships?

 

[sberry]

You can use a 6-50 P/R and most likely put it on a 8/60 circuit, a 60 because the breaker is cheap. It would run on a 50, if a guy is coming on this forum chances are he won't use this machine to its potential, its a pretty respectable unit, a couple steps up from most hobby garages, never need the maximum allowable breaker or utilize the duty cycle.
I am sure, 8/3 cord is what it calls for, if they allow for max breaker over 60 it should be 8.

 

[sberry]

I have a 2050, its a size smaller machine, used 10/50.

 

[pete379]

You can use a 6-50 P/R and most likely put it on a 8/60 circuit, a 60 because the breaker is cheap. It would run on a 50, if a guy is coming on this forum chances are he won't use this machine to its potential, its a pretty respectable unit, a couple steps up from most hobby garages, never need the maximum allowable breaker or utilize the duty cycle.
I am sure, 8/3 cord is what it calls for, if they allow for max breaker over 60 it should be 8.

so the 6 ga. wire i've got is heavy enough?

thanks, pete

 

[Charles (in GA)]

so the 6 ga. wire i've got is heavy enough?

thanks, pete

I really would not want 8 gauge wire. 6 is a much better choice.

Charles

 

[Thruxton]

My advice: RTFM! I'll bet there is a breaker recommendation from the mfr in it, and that's what I would use. A quick look at the Hypertherm site and the manual for their Powermax85 shows recommended fuse sizes, for example.