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Old 02-28-2010, 10:13 AM   #1
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240 volt circuit question


I wanna hook a plasma cutter up in my home shop using a twistlock plug(NEMA L6-30R) on a 30 amp double pole breaker. I would like to have more than one location to plug the plasma cutter in i.e. multiple receptacles. My question is can I hook them up on the the same circuit in series like 120v or do they have to be on seperate breakers?
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Old 02-28-2010, 10:45 AM   #2
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Quote:
Originally Posted by dukeofsolidsrfc View Post
I wanna hook a plasma cutter up in my home shop using a twistlock plug(NEMA L6-30R) on a 30 amp double pole breaker. I would like to have more than one location to plug the plasma cutter in i.e. multiple receptacles. My question is can I hook them up on the the same circuit in series like 120v or do they have to be on seperate breakers?
Yes, You can install more than one 220 volt receptacle to one 2 pole 30 amp breaker. You must use 30 amp receptacles and #10 wire.
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Old 02-28-2010, 10:46 AM   #3
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AC household plugs are never wired in series, they are wired in parallel. They are daisychained together, however this is NOT series wiring. Electricians on this forum have stated on a number of occasions that there is no limit to the number of plugs that can be daisychained on a single circuit. This was stated in regard to standard 15 or 20 amp outlets, however I know of no clause in the NEC that prohibits daisychaining of higher amperage outlets, perhaps others can cite a section that specifically addresses the issue.
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Old 02-28-2010, 11:11 AM   #4
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You can put as many receptacles as you want on one circuit. No limit.

As stated above, all receptacles must be 30 amp, and wire must be #10 or larger.

Rob
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Old 02-28-2010, 11:53 AM   #5
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Quote:
AC household plugs are never wired in series, they are wired in parallel.
Yeah that's what I meant.

Thanks for the help.
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Old 02-28-2010, 01:27 PM   #6
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I have two 240v recepts on the one circuit/breaker - one on either side of my workshop, so I can readily move my welder around.
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Old 02-28-2010, 02:00 PM   #7
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Quote:
Originally Posted by dukeofsolidsrfc View Post
I wanna hook a plasma cutter up in my home shop using a twistlock plug(NEMA L6-30R) on a 30 amp double pole breaker. I would like to have more than one location to plug the plasma cutter in i.e. multiple receptacles. My question is can I hook them up on the the same circuit in series like 120v or do they have to be on seperate breakers?
You can but you will have to pigtail the wiring at the receptacles so that you only have one wire per terminal on the receptacle - 30 Amp receptacles terminals are not rated for more than one wire per terminal.
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