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Old 11-05-2011, 05:38 PM   #1
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swapping plugs on heater


I want to swap a nema 6-20p plug with a twist lock plug. I have one lying around rated for 30 amps. Can I use this or should I go buy a 20 amp twist lock?

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Old 11-05-2011, 07:43 PM   #2
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swapping plugs on heater


You really should use the proper size and rating for the circuit and load.

I'd stick with the L6-20

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Old 11-05-2011, 08:10 PM   #3
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swapping plugs on heater


I was hoping to plug it in to 30 amp circuit I rarely use for a plasma cutter. Will I be ok in doing this?
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Old 11-05-2011, 08:36 PM   #4
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swapping plugs on heater


As a rule, never switch the plug on anything to accommodate another type of outlet. Rather install or have installed the proper outlet, circuit, and breaker.

I once was called in to clean up the mess of one such "plug switch". The person not only installed the wrong plug, but wired the ground from the equipment to hot on the plug!...

...And this happened to be about $70,000.00 worth of interconnected mini-computer equipment, which all was fried!
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Old 11-06-2011, 07:45 AM   #5
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swapping plugs on heater


What wire, breaker, and receptacle size should I use? The plate on the heater has 240 volts, 4000 watts, and 16.7 amps. The exact model of the heater is this.
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Old 11-06-2011, 09:56 AM   #6
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swapping plugs on heater


Here are the instructions you provided in your link. "this" Yes, you provided the link. Take a look. Page 3.

http://www.marleymep.com/en/multimed...0-2195-006.pdf
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Old 11-06-2011, 10:48 AM   #7
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swapping plugs on heater


Thats where I am confused because the cord/plug on the heater is a 20 amp cord(nema 6-20p). I thought max continuous load on 20 amps is 16 amps?
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Old 11-07-2011, 09:32 AM   #8
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swapping plugs on heater


Quote:
Originally Posted by dukeofsolidsrfc View Post
Thats where I am confused because the cord/plug on the heater is a 20 amp cord(nema 6-20p). I thought max continuous load on 20 amps is 16 amps?
the 80% rule is for permanent wired heater and does not apply to plug-in heaters. also unit is rated at 16.7 amp. and from manual it is marked

No adapter is available for this blade configuration, and none should be used.

i think you have your answer

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