I'm planning to make up a 75-100 foot extension cord for charging my roadster. Will 6-3 work or do I need 6-4?
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What voltage/amp are you planning on running through it?
6/3, 1/8 is a common 50 Amp extension cord used by RVs - molded NEMA 14-50P and R. I don't know about longer, but 50 footers are available from several sources, Amazon for one.
Note that the UMC checks for the ground prong actually being connected to ground.
I do not know if the UMC tests to see if the neutral prong is connected, but the UMC will operate with neutral and ground connected together so long as they are connected to ground.
I wonder if the UMC charging cable is even using the neutral prong at all? Maybe the neutral wire is not necessary? Maybe they are just using the 14-50 plug to be able to get more than 30 amps, which I think the three prong plugs may be limited to?
So how about this? I change the outlet on the wall back to 6-50, (it was previously set up for a welder). I buy 80 feet of bulk 6/3 wire and make my extension cord with a male 6-50 and a female 14-50? That should make for the minimum amount of connections and it seems that there would be no way for anyone to screw up and get hurt? What do you guys think?
So how about this? I change the outlet on the wall back to 6-50, (it was previously set up for a welder). I buy 80 feet of bulk 6/3 wire and make my extension cord with a male 6-50 and a female 14-50? That should make for the minimum amount of connections and it seems that there would be no way for anyone to screw up and get hurt? What do you guys think?
While not code they are combined in the electrical box so I have a hard time understanding where that is a problem.
That female 14-50 without a neutral connection is a problem, as has been stated a couple of times. You can tag it, tape it, whatever, but people don't read tags. Further, I am quite sure you will not find a nice molded female 14-50, and will have to use a box with a normal wall mount 14-50R.So how about this? I change the outlet on the wall back to 6-50, (it was previously set up for a welder). I buy 80 feet of bulk 6/3 wire and make my extension cord with a male 6-50 and a female 14-50? That should make for the minimum amount of connections and it seems that there would be no way for anyone to screw up and get hurt? What do you guys think?