Conductor Insulation in Hazardous Locations

[Jason Bryan]

In article 501.20 states "where condensed vapors or liquids may collect on , or come in contact with , the insulation on conductors, such insulation shall be of a type identified for use under such conditions; or the insulation shall be protected by a sheath of lead or by other approved means."

I have installed a beldon 8761 to a veeder root system(fuel system) in a class 1 division 1 location. The cable is in conduit per hazardous locations but the beldon cable 8761 cable is not gas and oil resistance. Is there anything you can do without removing the cable? Does the cable have to be gas and oil resistance?

 

[nakulak]

see 300.6 C 2 - is the cable subject to exposure of the chemicals ? Does chapter 3 apply ? (you didn't specify the use of the cable - class 2 or 3 might not need to meet that section)

 

[bobgorno]

Chapter 5 always supercedes...see 300.1(A) and 501.1. Throw out your considerations for Class 2 and Class 3 wiring in hazardous locations.

If the cable is in conduit, and you have appropriate low point drains, and the Veeder-Root meter is explosion proof, do you really think you will get condensed flammables in the conduit, on the cable?
Haven't seen that happen yet.

 

[weressl]

Chapter 5 always supercedes...see 300.1(A) and 501.1. Throw out your considerations for Class 2 and Class 3 wiring in hazardous locations.

If the cable is in conduit, and you have appropriate low point drains, and the Veeder-Root meter is explosion proof, do you really think you will get condensed flammables in the conduit, on the cable?
Haven't seen that happen yet.

You just didn't live long enough

 

[Jason Bryan]

So would I need to replace the cable if it is not gas and oil resistance?

 

[petersonra]

In article 501.20 states "where condensed vapors or liquids may collect on , or come in contact with , the insulation on conductors, such insulation shall be of a type identified for use under such conditions; or the insulation shall be protected by a sheath of lead or by other approved means."

I have installed a beldon 8761 to a veeder root system(fuel system) in a class 1 division 1 location. The cable is in conduit per hazardous locations but the beldon cable 8761 cable is not gas and oil resistance. Is there anything you can do without removing the cable? Does the cable have to be gas and oil resistance?

Do condensed vapors or liquids come in contact with the cable?

Can you protect it in some other approved way?

I might argue that there is virtually no chance of the condensed vapors or liquids getting in the conduit in the first place. They would have to come from somewhere. Unless there is a lot of vapors or liquids running around loose, just where would they come from?

 

[weressl]

Do condensed vapors or liquids come in contact with the cable?

Can you protect it in some other approved way?

I might argue that there is virtually no chance of the condensed vapors or liquids getting in the conduit in the first place. They would have to come from somewhere. Unless there is a lot of vapors or liquids running around loose, just where would they come from?

Since this is a Classified location, it all ready assumes that vapors will be present, either intermittently or contiously, depends on the Division.

Law of physics say: where there are vapors, there will be condensation under atmospheric conditions.

One can't say A and choose to ignore B.