NotreDave
Member
- Location
- Geismar, Louisiana
All,
Can you tell me by attached files, if i am on the right path for seal fitting placement. Or does the seal fitting need to go on the vertical line, above transmitter? Thanks in advance!
David
More detail is needed before we can tell if a seal is even needed, but if one is where you have it will be fine, actually it would need to be before the tee fitting so I don't see it could go in the vertical run.
Transmitter details, is it intrinsically safe? It is there arcing parts in it? It may not need a seal depending on some information you may find about it. Maybe you have already determined it does need a seal - IDK.
Going from memory here, but AFAIK the need for a seal is only needed when the item in question contains components that ordinarily create ignition sources - like switches or contactors. Otherwise boundary seals are the next level of sealing that is needed.kwired,
Thank you for the clarification. All I can see from the spec sheet is that it is explosion proof. So, I am assuming that I need a seal. Thanks again!
Going from memory here, but AFAIK the need for a seal is only needed when the item in question contains components that ordinarily create ignition sources - like switches or contactors. Otherwise boundary seals are the next level of sealing that is needed.
If a seal is needed it must be within 18 inches with only limited items such as explosion proof unions, reducers or capped elbows being the only thing between the seal and the enclosure requiring seal.
Going from memory here, but AFAIK the need for a seal is only needed when the item in question contains components that ordinarily create ignition sources - like switches or contactors. Otherwise boundary seals are the next level of sealing that is needed.
If a seal is needed it must be within 18 inches with only limited items such as explosion proof unions, reducers or capped elbows being the only thing between the seal and the enclosure requiring seal.
My understanding is similar to kwired's. But I think that the splice point is what you have to be concerned with. The transmitter shouldn't need any type of seal, but the wiring will need to be enclosed and isolated from the gasses. Many of those transmitters are provided with threads, and you can run conduit and a splice box, but I have done an installation where, there is an intrinsically safe barrier outside, and the wiring runs in conduit sealed at the class 1 boundary. Then it went to A GUAC box and there was a cable gland with the cable free aired in to it. The splicing was done with butt splices in the box.
It was about four years ago so I hope I'm not remembering wrongly.