3 PH Welder

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03-03-2006, 02:02 PM

Leo G

LRG WoodCrafting

Trade: Master Sawdust Producer

Join Date: May 2005

Location: Windsor Locks, Connecticut

Posts: 13,213

3 PH Welder

I am wiring a 3 Ph 300 amp welder in my shop. It calls for a 50 amp breaker. So that means I need to use 6 ga, correct? Also, it needs to go into a conduit. What size conduit am I going to need to run 4 (3 hot, 1 ground) 6 ga wires (THWN). Thanks.

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03-03-2006, 05:34 PM	#2
ATS View Profile ATS Pro Send Message Follow Blogs (0) Threads (162) Photos (0) Reviews (0) Projects (0) Toolbox (0) View All Activity Pro Trade: Electrical and mechanical contractor Join Date: Jun 2005 Posts: 162	Re: 3 PH Welder Yep, #6 THHN/THWN is what I would use. 3/4" EMT would be the code minimum size.

03-04-2006, 11:47 PM	#3
SpaHkee View Profile SpaHkee Journeyman Elect. Send Message Follow Blogs (0) Threads (8) Photos (0) Reviews (0) Projects (0) Toolbox (0) View All Activity Journeyman Elect. Trade: Electrical Join Date: Feb 2006 Location: Houston,TX Posts: 8	Re: 3 PH Welder if this is a long run make life easy and run 1" tho

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