Electric code questions?
Hotshot
Joined: Nov 2000
Posts: 11,591
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From: Pflugerville, tx
Originally Posted by Sberry27
No, the 20 is fine and you should have no problem. You will be limited to 20 A breaker which is what you have. What welder is this?
Thanks for your feedback.
Sam
Hotshot
Joined: Nov 2000
Posts: 11,591
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From: Pflugerville, tx
I stopped by Home Depot today to look at 'cord' and I see they have a 10/3 cord, Black/White/Green, no ground, soft rubber, stranded leads. This looks like what I'll want for the extension.
I measured in the garage and 20ft will take me to the far side of the second bay, in either direction. Any reason NOT to add another 5 ft just for slop reasons? that would be 25 for the extension, plus 6 for the welder line cord.
That effectively gets me almost the whole garage from one outlet. Another 5 feet would surely do it, but then 'most' of the time I wouldn't be needing to stretch this far, and would have extra cable on the floor (maybe 15ft too much).
Oh, and another thing.. I looked at my sub-panel, and the two 220 breakers are the monster 2in wide versions (2x1in @ 20amp).. is there any functional difference between these and the 2x1/2in versions? (ie, slow blow, heat disappation, ?)
thanks
Sam
I measured in the garage and 20ft will take me to the far side of the second bay, in either direction. Any reason NOT to add another 5 ft just for slop reasons? that would be 25 for the extension, plus 6 for the welder line cord.
That effectively gets me almost the whole garage from one outlet. Another 5 feet would surely do it, but then 'most' of the time I wouldn't be needing to stretch this far, and would have extra cable on the floor (maybe 15ft too much).
Oh, and another thing.. I looked at my sub-panel, and the two 220 breakers are the monster 2in wide versions (2x1in @ 20amp).. is there any functional difference between these and the 2x1/2in versions? (ie, slow blow, heat disappation, ?)
thanks
Sam
Tuned
Joined: Sep 2003
Posts: 483
Likes: 1
That is the cord you want. When you hook it up use black tape on both ends of the white wire to indicate it is a hot wire. Just good practice although it may not mean as much with a cord, but good anyway, or color with black marker. Green is ALWAYS ground. With that wire size it wont hurt a thing to make it as long as you want, remember there may be things in the way that you want to go around, a direct route is not always possible, 5 or 10 ft is not too much extra. Yes, there are differences in these breakers, what brand panel to you have? Some of the thinner ones are not 240V, they are tandem breakers to gain space. It needs to have double poles so it contacts each buss bar. It should be a monster, yes. In reality you could use a number 12 with this setup, the 10 doesnt hurt and will allow slightly better current at highest load, it is also useful in the future should you ever upsize a welder.
Hotshot
Joined: Nov 2000
Posts: 11,591
Likes: 14
From: Pflugerville, tx
Originally Posted by Sberry27
Yes, there are differences in these breakers, what brand panel to you have? Some of the thinner ones are not 240V, they are tandem breakers to gain space. It needs to have double poles so it contacts each buss bar. It should be a monster, yes.
I don't know the panel brand, but these are GE breakers. the singles are 1/2 inch wide. Then there are two types of 240s, twin 1/2 wide and twin 1in wide.
20, 30 and 50 amp in both. With the two switch handles connected together.
Sam
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Elder User
Joined: Feb 2004
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Originally Posted by future10
GotLift,
The box I mentioned earlier is the RACO 187. 4 x 4 x 1.5 inches deep with a single gang hole in the back to go over an existing box in the wall.
The box I mentioned earlier is the RACO 187. 4 x 4 x 1.5 inches deep with a single gang hole in the back to go over an existing box in the wall.
Thanks for that info! I'll look for it next time I go to Home Depot.
Appreciate it!
Hotshot
Joined: Nov 2000
Posts: 11,591
Likes: 14
From: Pflugerville, tx
Originally Posted by Sberry27
In reality you could use a number 12 with this setup, the 10 doesnt hurt and will allow slightly better current at highest load, it is also useful in the future should you ever upsize a welder.
my assumption is that the ground (bare) wire in the 10/2 cable in the wall should attached to the neutral bar in the panel, not the ground bar.
I usually use 3+ground for 220.
Sam
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Tuned
Joined: Sep 2003
Posts: 483
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This is a subfed panel? It goes to the ground bar, this machine does not use a neutral, it is a strickly 240 appliance. 240 loads use 2 hots and a ground. Appliances like electric dryers and some new ovens use both 120 and 240, they require 4 wire circuits. Old dryer circuits were allowed to use 3 wire but any more.
