cord and plug connected conveyors

[reyamkram]

What are the rules, for industrial conveyors that are cord and plug connected ??
I have a 3 phase, 1/3 hp, 230v motor on a conveyor, Do I need a disconnect, or 3 phase
snap switch or can I use the cord for the disconnected ? and what about and over load,
do I need OL protection for that motor?? would I look in NFPA 70 or NFPA79??

 

[kwired]

What are the rules, for industrial conveyors that are cord and plug connected ??
I have a 3 phase, 1/3 hp, 230v motor on a conveyor, Do I need a disconnect, or 3 phase
snap switch or can I use the cord for the disconnected ? and what about and over load,
do I need OL protection for that motor?? would I look in NFPA 70 or NFPA79??

did you look in Art 430 and 422? Basic rules are same for all motors/motor operated appliances.

The fact they are cord and plug connected - if they are portable, frequently interchanged, etc, will allow for cord and plug connection. Cord and plug can be considered a disconnecting means.

 

[augie47]

As far as being permissible, see NEC 400.7 & 400.8. If the situation qualifies under 400.7 {perhaps (6) or (7) or (9) } then cord is permitted. Be sure to check out 430.109(F) for ratings.

As far as overload, see Section II or Art 430. In most cases, some method of providing overload protection is required.

 

[petersonra]

What are the rules, for industrial conveyors that are cord and plug connected ??
I have a 3 phase, 1/3 hp, 230v motor on a conveyor, Do I need a disconnect, or 3 phase
snap switch or can I use the cord for the disconnected ? and what about and over load,
do I need OL protection for that motor?? would I look in NFPA 70 or NFPA79??

The rules are the same for overload protection, short circuit protection, and disconnecting means for cord and plug connected motors as for hard wired motors.

The code sometimes allows you to use the branch circuit OCPD as the short circuit protection and/or the disconnecting means.

Sometimes the overload protection can be built into the motor.

Sometimes a plug/receptacle is allowed to be used as a disconnecting means.

It is not easy from the other end of the Internet to tell you what the code allows you to do in your specific circumstance. You will need to review the appropriate code sections and make that determination for yourself.

I am not convinced a single conveyor is covered by NFPA79. In any case, NFPA79 is not a standard that has been legally adopted by any jurisdiction I am aware of. The NEC or some variant or similar code is what usually governs electrical installations in the US.