so if i run lighting to a pump house in an oilfield that is classified class 1 div 1 or class 1 div 2, then those ckts have to be intrinsically safe?
I don't think that it is even possible to have an intrinsically safe lighting circuit. For an instrinsically safe circuit there must be no possible way to cause a spark that has enough energy to ignite the gasses, even if you short the conductors. Lighting would have to be of the type approved for the area classification and the raceways and seals will have to comply with Article 501. Don
"COMPLY NEC 514.11 AND 514.13/SPECIFY ALL CIRCUITS INCL INTERCOMS, LO VOLT CONTROLS, COMPUTERS, INTRINSICALLY SAFE, ETC)."
Is this installation a gas station? That is the application of Article 514. It does not apply to other classified areas. The code sections cited require that there be a means of disconnect for all circuits of any type that serve a fuel dispensing unit, and do not apply to any other classified areas. Don
[This message has been edited by resqcapt19 (edited 10-14-2004).]
Mustang, I have found that you have to really educate yourself regarding hazardous locations. A lot of inspectors are not completely informed of the requirements and therefore make guesses. If you are installing a light fixture it can not be made intrinsically safe. It must be a fixture rated and listed for the hazardous location with the proper raceway and seals. Usually only control items can be made intrinsically safe, such as float switches etc, using the proper components. I had an inspector walk in on a job I did and condemned the job as soon as he saw thinwall. Kept repeating "All wiring in a hazardous location must be in rigid". He could not understand "intrinsically safe". Took a lot of my time meeting with him and his boss to get it approved. Because I took the time to read and read until I understood hazardous location wiring I was able to stand there, proud of the job, knowing I would not have to change anything. I'm sure if you ask the inspector face to face what his interpretation is you will both learn and the job will be safe. Ron