Class 1 Division Area

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rstraley

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On a current project within a Class 1 Division 1 area, the designer indicated explosion proof disconnect switches for every device, 120v solenoid valves, level sensors etc. Is this a NEC requirement?
 
rstraley said:
On a current project within a Class 1 Division 1 area, the designer indicated explosion proof disconnect switches for every device, 120v solenoid valves, level sensors etc. Is this a NEC requirement?
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I am not sure if a Disco is required, but where one is installed it has to be explosion proof..... it is an NEC requirement... Article 500
 
rstraley said:
My question might not have been clear. Is a disconnect is required for the low voltage equipment in a Class 1 Division 1 area?
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generally you need some means of removing power from any powered device.

it does not have to be located in the classified area though.
 
rstraley said:
On a current project within a Class 1 Division 1 area, the designer indicated explosion proof disconnect switches for every device, 120v solenoid valves, level sensors etc. Is this a NEC requirement?
Click to expand...

not required by nec, must be a design thing. expensive!
 
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