Class 2 Div1 Tray Cable

[PapaGreg]

I have run across an installation at a wheat grain elevator where Tray cable TC has been used for the Watch Dog Monitoring System wiring method. I don't see where TC is identified for use in this location. The probe inputs operate on 24 VDC. Could this be acceptable?

 

[jumper]

Hey Papa, I moved this to Hazardous locations for a better response.

 

[rbalex]

Type TC is not a recognized wiring method in Class II, Divison 1. See Section 502.10(A).

 

[PapaGreg]

Wanted to make sure

Wanted to make sure

Wanted to make sure" what I read was really what I thought I read". Thanks.

 

[masterinbama]

What if it's intrinsically safe wiring and equipment?

 

[rbalex]

What if it's intrinsically safe wiring and equipment?

If a system doesn’t meet all the requirements of Article 504 including ANSI/ISA RP 12.06.01, it isn’t intrinsically safe. I know ANSI/ISA RP 12.06.01 is only referenced in FPN/INs, but the equipment won’t be listed otherwise. [See 504.4]

To be blunt, there are so many auxiliary requirements in Article 504 and ANSI/ISA RP 12.06.01 that people usually know if a system is intrinsically safe.

I just answered the question asked, I could have speculated on much more than intrinsically safe systems.