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Subject - div 1 class1 explosion proof
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tonyd
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got 4 solinoids to wire in a div 1 class 1 location. havnt done much explosion proof stuff. lets see i put a sealing fitting right before i enter the room and another one once i get in then run my conduit to the location of the valves, another fitting before the j box and fittings out of the box to every valve . ill be needing two boxes . do i put a fitting between the two. is that where the 18 in. comes into effect ?????
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Ryan_J
| Do the solinoids contain make and break contacts? Also, you only need one seal fitting at boundary. You put it within 10' of the classifed area on either side of the boundary, as long as the only fitting between the boundary and the seal is a listed explosion proof reducing bushing.
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tonyd
| i know that one sol is just a coil but dont have the other valves yet . what about the splices ???
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tonyd
| i also want to thank you for yr reply not my $$ just want to cover my butt
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devo
| don't have my code book right here but I believe class 1 div 1 is a 20' boundary???
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DiverDan
| As I remember, the C1-Z1(now Class 1, Zone 1) boundry varies depending on the group classification and environmental usage. I do have a few other questions and thoughts. All electrical devices in a C1Z1 area must be marked as explosion proof and usually carry UL and FM stampings. There are C1Z1 solinoids designed especially for this application. Also, what kind of "J" box are you using. If this is a metal device box it will have threaded inlets and cover(the O-ring on the cover is optional). If it is a pull box type then the "J" box must either be C1Z1 rated or a NEMA 4 design and purged with either air or nitrogen. What type of conduit are your using? Only rigid steel, aluminum and special C1Z1 flex are permitted except when supplying an intrinsically supported device. Then a light blue cable is used. C1Z1 devices and boxes are expensive so a bit of product and pricing research would be recommended.
As a note: writing C1Z1 instead of C1D1 is really strange. The NEC changed it this year to match Europes notation.
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