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wiring up a 100 amp feed

PostPosted: February 18th, 2009, 5:00 pm
by grumpyvette
I BOUGHT AN OLDER MILLER 330 AMP TIG WELDER AT A DECENT PRICE, BUT IT WEIGHTS 900 LBS AND REQUIRES A 100 AMP FEED

I saw the price of 100 amp disconnect plugs at the local electrical supply and said thats nuts! a plug and socket costs $500???

I ran into the same problem with my 100 amp feed on my 330 amp tig, the correct plug/socket listed at almost $500 at the local electrical supply
(THATS TOTALLY NUTS)
so I thought about it a bit and bought three of these TWIST CONNECTORS FOR WELDING CABLES

http://www.fastenal.com/web/products/detail.ex?sku=0812198

theres a MALE and FEMALE END to each TWIST CONNECTOR

BTW they cost me about $20 each at the local welding supply

painted two red POWER and one green NEUTRAL/GROUND


ran three feed wires in conduit to a large plastic storage box with a cam loc front pannel

ran a 50 foot long tripple feed cable attached to the welder inside 2" flex tube

the green is ground the two reds are power, think about it a bit, it works great, I simply leave the 100 amp electrical braker off , unless they are connected to the welder and you can,t screw it up because its both color coded and the ends won,t connect wrong physically

hooked up the green one from the wall connection with the extended male side of the connector extended, ran the two red feed with the enclosed female side from the power
http://www.fastenal.com/web/products/detail.ex?sku=0812198

walls got two red female and one green male connector, welders got a 50 ft extension cable with two red male and one green female connector

the 100 amp breaker keeps power from the connectors unless they are connected and the connections are made in a 18" plastic water resistant electrical box with a lockable lid mounted 4 ft above the floor

just use the correct ga. I used 00 GA (2 OUGHT)


http://www.powerstream.com/Wire_Size.htm

THE 50 FT TAIL ON THE WELDER ALOWS ME TO MOVE THE TIG ANYPLACE IN THE SHOP AS THE CONNECTORS ON A WALL MOUNT NEAR DEAD CENTER BETWEEN THE GARAGE DOORS

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NEAR THE TRACTOR IN THIS PICTURE


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IVE got a MANUAL DISCONNECT,in the line between the breaker and the connection box, with a big sign, (emergency disconnect) I just didn,t get into that as it seemed to complicate things in the description of the circuit