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What plug to use for 30 amp charger?

5277 Views 12 Replies 7 Participants Last post by  Overlander23
Hi all,
I'm trying to settle on a plug to use for my PFC-30. It comes with a NEMA 14-30 on it, and they say to use an adapter to convert it to other plug types. I'll probably put an adapter on the inside of the car to the gas tank lid, and I'm wondering why plug people most often use for a 30 amp charge. Should I use a locking plug, like the NEMA L6-30, or an unlocking one?

Any advice, or notes on what is the most common to use?

I'll also need to make up an extension cord to charge in my garage -- I can install whatever outlet I need at up to 50 amps. I already have a 6-50 plug for a powder coating oven, and another 50 amp one (forget the kind) for my welder.

corbin
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I've forgotten the designation, but it is a four prong plug.
That would be a NEMA 14-30 which is the wrong plug type for the application, unless you needed 120 volt along with 240.

A NEMA 14-30 is a 4 Wire with an EGC. One of the 4 lines is the grounded circuit conductor (neutral conductor) which derives 120 volts. Only place you see them occasionally is something like a close dryer, where the motor and controls operate at 120 volts and the heating elements work on 240 volts.

For a 240 volt charger all you need is L1, L2, and G. Neutral serves no purpose.
 

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So if I wanted a twist-locking style connector for a 5kw, 220v/110v Elcon charger where either 220v or 110v would operate the charger and 120v would operate a charge-interlock relay at all times... could I use a NEMA L14-30?
I would think so because it is 4-wire (L1, L2, N, + G) You have to have neutral to derive 120 VAC.

I am curious about the charger being either 240 or 120. At 120 the power would have to be half right? No way to get 5 Kw at 120 volt with 30 amps. Technically to be code and UL compliant the maximum continuous load current you can run on a connector is 80 % of the rating. So with that said I would think the max power at 120 volts would be 2660 watts.
 
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