Mixing Wiring and Pneumatics in Raceway

[JBender]

I work for a small machine builder. We just got hit for mixing wiring and pneumatic tubing in the same Nema 1 raceway. This has never come up before in the 10 years or so of this company...

What are peoples opinion on NEC 300.8 that says not to? Is my assumption that it gets done all the time correct?

FYI

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

 

[MikeHalloran]

Well, _now_, it's come up.

Perhaps your company's earlier products fell under the scope limitation of 300-1(b)... or not.







Mike Halloran
Pembroke Pines, FL, USA

 

[eromlignod]

Yes, it does get done all the time. It depends on whether you are required to follow the NEC standard.

Don
Kansas City

 

[JBender]

Thanks for the 300.1(B) suggesstion. I think we fall outside of that, however.

I have found an interesting Article 725 that talks about Class 1, 2, and 3 remote control, signaling, and power limited circuits. Class 2 and 3 circuits are exempt from a lot of Article 300. Anyone ever "use" this to mix pneumatics and low voltage?