Explosion Proof Flexible Conduit????
Explosion Proof Flexible Conduit????
(OP)
In a class 1 div. 2 group d area...
a wire leaves a control room and into the hazardous area 30' and then to an 8' long flame detection device...
This is the first time I've had to deal with this stuff and of course they want some kind of quote today...
my idea was to find 30' of some sealed flexible conduit (they need the line to be flexible)... not sure if it has to be explosion proof conduit or what... then put an explosion proof seal fitting on each end to seal it... then have the 8' long flame rod (just a flame sensing device in an 8' long tube) sealed on the other side of the one fitting on the flexible hose... then have another fitting within 18" from the end of the flame rod...
These are my original thoughts from what I could gather online for what is needed for this type of hazardous area...
I would really appreciate any guidance... I told my boss I needed a copy of the NEC about 1.5 mo ago... still havent seen it.... any help is much appreciated!
a wire leaves a control room and into the hazardous area 30' and then to an 8' long flame detection device...
This is the first time I've had to deal with this stuff and of course they want some kind of quote today...
my idea was to find 30' of some sealed flexible conduit (they need the line to be flexible)... not sure if it has to be explosion proof conduit or what... then put an explosion proof seal fitting on each end to seal it... then have the 8' long flame rod (just a flame sensing device in an 8' long tube) sealed on the other side of the one fitting on the flexible hose... then have another fitting within 18" from the end of the flame rod...
These are my original thoughts from what I could gather online for what is needed for this type of hazardous area...
I would really appreciate any guidance... I told my boss I needed a copy of the NEC about 1.5 mo ago... still havent seen it.... any help is much appreciated!






RE: Explosion Proof Flexible Conduit????
Also let sparkies deal with electrical engineering.
Rafiq Bulsara
http://www.srengineersct.com
RE: Explosion Proof Flexible Conduit????
I would like to let sparkies deal with EE stuff, but I'm as close to an EE that my company has... since I am the whole engineering dept... I just got this job about 2 months ago... so I'm going to have to learn to wear many hats here
RE: Explosion Proof Flexible Conduit????
USAeng:
I understand your position and appreciate your candidness. The correct solution for your company is to hire an EE or a consultant. This site is for professionals. While someone may occasionally answer your questions, it may do more harm than good to you, if you do not understand full implication of one explanation.
You will also do well to buy the NEC Handbook that has some explanatory materials and pictures to better understand the code.
Rafiq Bulsara
http://www.srengineersct.com
RE: Explosion Proof Flexible Conduit????
I have not looked at your application. Consider straight conduit with flex at the end. Even 30-inches is long for flexible conduit in classified areas. Sealtight is a term for flexible conduit in Division 2 areas and usually limited below 18-inches. Braided flexible conduit is available for Division 1 areas. If you cannot buy a copy of the NEC then your budget is several orders of magnitude below the cost of braided flexible Div. 1 conduit.
RE: Explosion Proof Flexible Conduit????
Good luck,
Latexman
RE: Explosion Proof Flexible Conduit????
Lots of information and it's free
http://ww
Appelton has the same type book but you have to get it from a vendor rep (if they still make it) There is basic info and a tutorial on Appetons web site but no PDF of the Code Digest.
This is close
http
RE: Explosion Proof Flexible Conduit????
http
It's free, it will cost you nothing more than an email address. Hazardours installations are covered in Articles 500-510 or so.
It may also be worthwhile for you to learn about "intrinsically safe" installations and see if that term applies to your installation.