This question is two fold:
I have a PrimeWeld 225x TIG welder and it calls for a 50amp/220v breaker and NEMA 6-50P.
I need to run 60 feet from NEMA 6-50P to breaker box (I have 200amp service). Googling, I think I should be using AWG 6/2 wire. This will be running indoor along exposed ceiling. So I assume conduit is a must.
My father-in-law is an electrician and he says I can use his AWG 8 (500' spool) ground wire to save money. He says I can run three 60' lengths of this wire through conduit to make 8/2 with ground.
I'm skeptical because the conduit would be mounted to wooden ceiling joist. So I want the 50amp breaker to do its job if for some reason the wires get too hot. He mentioned he has plenty of heavy duty plastic/metal conduit used for outdoor C/A units if I wanted to be extra safe.
Here is exactly (best I could read) what his wire has stamped on it:
"SOUTHWIRE E51583(UL)(AWG 8) 8,367mm2 CU TYPE MTW THWN-2 OR THHN OR GASOLINE AND OIL RESISTANT II OR AWM 600 VOLTS VW-1--CSA T90 NYLON OR TWN75 FT1 NOM-ANCE 90° C"
I'm used to only running Romex wire from Home Depot, so this multi-rated wire is so confusing to me and he was trying to explain it to me (language barrier), but I'm still not sure.
- Is this AWG 8 wire acceptable for my 50amp application?
- Can I use it along with conduit to make 8/2 (with ground)for my application?
6/2 MC wire runs about $3/ft, so it's great that he can save me a lot of money, but I hope someone can clarify if his idea would be safe and up to code.