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Old 07-21-2009, 05:25 PM   #1
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30A 240v plug

What is a standard for a 240v plug that can support 30 amps? I have this heater that is to be hard wired to the panel, but I'd like to just make it plug in instead, just for easier removal for cleaning or what not.

I googled real quick and found twist lock, but are these the same as 120v or are the pins different? I've seen 120v twist locks used in server environments, so it seems kinda odd if it works for 120 and 240 from a standards point of view. Of course I can use any plug and just give it more power, but I want to do it right. The heater in question is 4800watt so I'm guessing that's 20amps so I want to rate it for 30 to be on the extra safe side as 20 is cutting it close.


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Old 07-21-2009, 06:24 PM   #2
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Here is some 30 amp twist locks http://www.foxelectricsupply.com/con...tegoryId=24355


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Old 07-21-2009, 07:08 PM   #3
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Dryer recep/cord?
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Old 07-22-2009, 12:48 AM   #4
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If your are looking for a 30 amp 250 volt twist lock, look for NEMA L6-30 or a 20 amp 250 volt twist lock would be the L6-20 (120 volt versions are the L5). Otherwise you can get the 3 or 4 pin dryer style plugs, probably cheaper and usually more readily available than the twist lock plugs are.

I have a ton of twist locks for different things, in fact I am installing both a 20 amp (L5-20) and a 30 amp (L5-30) in my server room in my basement. Powering two data racks, the 30 amp is for a future UPS that can supply the rack with enough power to keep my servers running during short or consecutive power outages.
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