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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'm using the 30 A locking plug, because I could fit it easier than the dryer plug, and I could buy a 25 ft extension cord for generators at Home Depot with matching plug for $65. My pack is max of about 124V at end of charge, so I only draw about 16A from a 240VAC outlet when charging at 30ADC. I also have a PFC30.
 

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That would be a NEMA L6-30, which is a three prong 250 volt with two hots and a ground. I like Leviton products. Their car mount flanged plug is their #2625F.

By the way, doesn't your PFC30 cut back at 30 amps DC due to being thermally challenged? Seems you discussed this some time ago.
I've forgotten the designation (Edit: it is an L14-30C), but it is a four prong plug. If it wasn't dark and pouring and blowing rain outside, I would go out to the (separate) garage and look. :D The charger does cut back in hot summer temperatures when charging at 30ADC, but I charged at that current all last winter with no problem. At 100F it cuts back at around 28ADC. I've started charging at 26-27ADC now, unless I want to do a quick 1 hour or so charge to get back on the road, and the temperature is low enough to run it at higher output. I thought maybe I accelerated the failure of my input rectifier board by stressing it at high temperatures. It would be nice if Rich supplied a derating curve.
 

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That would be a NEMA 14-30 which is the wrong plug type for the application, unless you needed 120 volt along with 240.
The plug is an L14-30C. The PFC30 operates off 240VAC or 120VAC. I have several adapter pigtails to use either. I also run an interlock relay off the 120VAC. These plugs are pricey compared to a "dryer plug" like the NEMA 14-50 or 30, but those wouldn't fit in the space I had, and the $65.00 Home Depot 240VAC/30A generator extension cord comes with this type connectors. Problem is, each of the adapter pigtails requires one of those pricey L14-30C connectors.
 
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