Industrial Control Panel Disconnects - UL508A

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dbuschor

Member
When does a control panel become part of a Industrial Machine for determining if a main disconnect is required?

For example:
1) Does all packaging equipment fall under the definition of Industrial Machine?
a) Wrapper
b) Labeler
c) Checkweigher

2) Does a "Line Control PLC Panel" which integrates (sequencial start/stop) several Industrial Machines
a) If it doesn't have any power circuits for drives, starters or other motors
b) If it has drives or starters for auxiliary conveyors and blowers etc.

3) What about a PLC Panel controlling a Batch Processing plant which includes motors for agitators and transfer pumps
 

dbaird

Member
Location
Dayton, OH
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NFPA 79 Electrical Standard for Industrial Machinery defines Industrial Machinery as:

nfpa-79-3356


Additionally:

nfpa-53
 

petersonra

Senior Member
Location
Northern illinois
Occupation
engineer
When does a control panel become part of a Industrial Machine for determining if a main disconnect is required?

For example:
1) Does all packaging equipment fall under the definition of Industrial Machine?
a) Wrapper
b) Labeler
c) Checkweigher

2) Does a "Line Control PLC Panel" which integrates (sequencial start/stop) several Industrial Machines
a) If it doesn't have any power circuits for drives, starters or other motors
b) If it has drives or starters for auxiliary conveyors and blowers etc.

3) What about a PLC Panel controlling a Batch Processing plant which includes motors for agitators and transfer pumps

I am not sure if the control panel is part of the machine or not. The machine still has to have a disconnect IMO.

I think the answer to your question about what constitutes an industrial machine may well be found in NFPA79 as another poster suggested.
 
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