Motor Control Center

[referee]

Is it legal to lock a Motor Control Center where there are no exposed or access to live conductors? All voltages are 480 volts 3 phase "Y".What I mean by lock is: The doors leading into the M.C.C. I am being told that the outside doors can be locked from the outside as long as the doors can open in an emergency from the inside.

[ July 20, 2004, 06:48 PM: Message edited by: referee ]

 

[charlie b]

Re: Motor Control Center

What do you mean "lock"? Are you talking about locking the room in which the MCC is installed? Locking the covers on each of the MCC buckets? Locking the breakers in the closed position?

 

[tom baker]

Re: Motor Control Center

The door to the equiment room could be locked. There is a rule for hotels with continuous building managment that the electrical rooms can be locked.
There are requirements in the 2002 NEC for electrical room egress requirements for equipment over 1600 amps: outswinging door, panic hardware, two doors or one if space large enough

 

[referee]

Re: Motor Control Center

Originally posted by tom baker:
The door to the equiment room could be locked. There is a rule for hotels with continuous building managment that the electrical rooms can be locked.
There are requirements in the 2002 NEC for electrical room egress requirements for equipment over 1600 amps: outswinging door, panic hardware, two doors or one if space large enough

Thank you for your help. I have a good idea now.