three prong plug, only two wires

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  #1  
Old 10-18-13, 02:33 PM
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three prong plug, only two wires

Hello everyone,

I just purchased some equipment for work.

It is essentially a metal box with a heater in it. Another piece of equipment passes through the heater. It will be used outdoors, on a metal platform

It came with three prong, 110v, 15 amp plugs. Inside there are only two wires, no grounding connection.

Seems dumb to me and I don't think I would want to use it.

Legal?
 
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Old 10-18-13, 02:42 PM
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Welcome to the forums! You are right. The unit should be double insulated and use a 2 prong plug, or a three prong plug and have a grounding wire. If it is a conduit former, it should be grounded, since double insulating a hot piece of equipment would be difficult. Have you stripped back any of the wiring at the plug to see if a ground wire exists in the cable?

Legal? Ask an attorney. Code worthy, nope.
 
  #3  
Old 10-18-13, 07:13 PM
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It came with three prong, 110v, 15 amp plugs. Inside there are only two wires, no grounding connection.
Is this custom built equipment? Does it have a U.L. label (not the cord, the equipment)?
 
  #4  
Old 10-28-13, 01:12 PM
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only two wires in the cable.

No UL label on cable or equipment.

purchased from manufacturer of the equipment.

could anyone reference the code where it states such a thing.

Thanks,
 
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Old 10-28-13, 03:09 PM
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could anyone reference the code where it states such a thing.
What code? The NEC? It has no authority unless adopted by your local jurisdiction. Then there's the question of which edition they're currently using and what they also adopted to modify what the NEC contains.

What "thing" are you asking about?
 
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