plugs used to energize permanantly mounted equipment

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mike wright

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I am an design tech and my customer wants to know if we can use a flexible cord and plug to energize a process control panel which is permanantly wall mounted. Violtage is 120/208, amperage is 20A. I don't find it specifically addressed in the NEC, but it is inferred to be acceptable in many sections.
 
It would need to fall under one or more of the conditions of 400.7. Otherwise it probably falls under
400.8 Uses Not Permitted,
(1) As a substitute for fixed wiring of a structure.
 
infinity said:
It would need to fall under one or more of the conditions of 400.7. Otherwise it probably falls under
400.8 Uses Not Permitted,
(1) As a substitute for fixed wiring of a structure.
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Is a process control panel part of the fixed wiring of a structure?
I need a definition of permanently mounted?

Are exit signs and emergency lites permanently mounted? They are allowed to be cord and plug connected.:D
 
dlhoule said:
Is a process control panel part of the fixed wiring of a structure?
I need a definition of permanently mounted?

Are exit signs and emergency lites permanently mounted? They are allowed to be cord and plug connected.:D
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If the control panel is designed to be hardwired than IMO a cord may be a substitute for fixed wiring.

Regarding your example, emergency lights or unit equipment as they're called in Article 700 are given specific permission to be fixed in place and cord and plug connected.
 
IMO, just because something is mounted on a wall does not mean the wiring to it is part of the premises wiring. Think about all the lamps and clocks and TVs that are wall mounted and come with a cord. Think about all the under cabinet appliances that are cord and plug connected but are securely mounted to the cabinet.

Just because something is fixed in place does not mean the wiring to it is part of the building's premises wiring. In fact, the code specifically allows such a connection to be used as a disconnecting means for certain sizes of motors. Nothing is stated in that section of the code requiring the equipment those motors are serving to not be fixed in position.
 
LarryFine said:
The answer may lie within the manufacturer's documentation, Grasshopper.
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NRTL listing and Mfg. instructions get my vote check 110.3 (B)

Charlie
 
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