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Intrinsically Safe Wiring for security

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JonathanRoche

Member
I am installing a security system in our shop. the electrical inspector came through and would like me to move my junction boxes at the over head doors to 18" and says that my magnetic switch that i was going to use on those doors will not meet the intrinsically safe wiring.

I do not understand why if it is a low voltage system the height of the box makes any difference(they are about 6" off ground becuase I am splicing to a switch with an 18 inch lead. witch has to reach over to the door.(mounts on floor))

and how do I know the specifactions for requirements in the shop for it to be Intrinsically Safe Wiring?
 
tom baker

tom baker

First Chief Moderator & NEC Expert
Staff member
Location
Bremerton, Washington
Occupation
Master Electrician
Re: Intrinsically Safe Wiring for security

What type of shop is this? Or what NEC article would cover the wiring in the shop?
 
J

JonathanRoche

Member
Re: Intrinsically Safe Wiring for security

It is a mechanics shop. large 6 bays for semi's. they will be repairing anything our company uses in the underground utility construction business. from dozers to chainsaws.

they are saying because of the oxygen and acetyline torch and welding as well as fuel from trucks. the presence of gasoline might be around.
 
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