pneumatic lines in same raceway as THHN

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Jordanhuwa

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We have a new saw that takes 480 V 3 Phase and a 1/4" air line. We want to put it in the middle of the shop where we have an underground conduit. Is it a code violation to pull my air line with my 480V wires?
 
Jordanhuwa said:
Is it a code violation to pull my air line with my 480V wires?
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Yes, it is a violation of 300.8

300.8 Installation of Conductors with Other Systems.
Raceways or cable trays containing electrical conductors shall not contain any pipe, tube, or equal for steam, water, air, gas, drainage, or any service other than electrical.
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Roger
 
Roger,

thanks for the info. I was looking for the code on that as well.

By chance is there a code violation reference for placing pneumatic valves inside the electrical enclosure with the plc and controls? I am at a facility where this happens and
i cannot get those responsible to see the fact that the oil mist from the valves is destroying the electrical controls and costring them money, not to mention the arc flash hazard.

regards,
james
 
james_mcquade said:
Roger,

thanks for the info. I was looking for the code on that as well.

By chance is there a code violation reference for placing pneumatic valves inside the electrical enclosure with the plc and controls? I am at a facility where this happens and
i cannot get those responsible to see the fact that the oil mist from the valves is destroying the electrical controls and costring them money, not to mention the arc flash hazard.

regards,
james
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pipe the exhaust out of the box. solves the problem of oiled controls.
 
james_mcquade said:
Roger,

thanks for the info. I was looking for the code on that as well.

By chance is there a code violation reference for placing pneumatic valves inside the electrical enclosure with the plc and controls? I am at a facility where this happens and
i cannot get those responsible to see the fact that the oil mist from the valves is destroying the electrical controls and costring them money, not to mention the arc flash hazard.

regards,
james
Click to expand...

James, look at 110.11 and 110.12(B) and see if they might help.

Roger
 
Petersonra,
We did that on one machine and during a weekend, the air line to the valves burst.
Monday at 7 am, we opened the electrical cabinet and we got a bath. We estimate that there was at least 6" of water in the enclosure.

Thanks again everyone for your input.
Thanks Mike for your website.

regards,
james
 
james_mcquade said:
Petersonra,
We did that on one machine and during a weekend, the air line to the valves burst.
Monday at 7 am, we opened the electrical cabinet and we got a bath. We estimate that there was at least 6" of water in the enclosure.

Thanks again everyone for your input.
Thanks Mike for your website.

regards,
james
Click to expand...

I have designed control systems for almost 30 years and put tens of thousands of solenoid valves on air lines inside enclosures and can't recall a single instance of an air line bursting. And most of them were plastic air lines.

Is it possible the air line had some help breaking?
 
Petersonra,

I agree with what your saying, but not in this case.
9" above the valve bank is where the plastic pipe ruptured. It looked loke someone took the air line and just kept adding air pressure. Eventually the pipe had a buldge and it burst.

regards,
james
 
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