Citrusflight
Member
- Location
- Lecanto Fl. USA
Folks need help understanding these two exceptions.
NEC 2014, 501.15(B) (2) Can you explain exceptions 2 and 4. I am having a hard time understanding why you don't seal conduit routes in and out of a C1D2 boundary. I got brought into the project at its end and conduit seals came up to me. My understanding is not to allow gas to be transported to adjacent equipment that's outside the boundary. Boundary is defined by the AE on their drawings. Exception 4 seems to block exception 2 based on splices, terminals or taps. Can bolted motor connections or ring lugged connections on a TB be an ignition source.
Examples I have
Motor termination box ,conduit goes out to tray outside of the boundary. (splice connection in motor box) Motor is outside in C1D2
Termination box same scenario as above. (terminal block connections).
Any examples of E 2 & E 4 would be helpful.
Thanks
Bob
NEC 2014, 501.15(B) (2) Can you explain exceptions 2 and 4. I am having a hard time understanding why you don't seal conduit routes in and out of a C1D2 boundary. I got brought into the project at its end and conduit seals came up to me. My understanding is not to allow gas to be transported to adjacent equipment that's outside the boundary. Boundary is defined by the AE on their drawings. Exception 4 seems to block exception 2 based on splices, terminals or taps. Can bolted motor connections or ring lugged connections on a TB be an ignition source.
Examples I have
Motor termination box ,conduit goes out to tray outside of the boundary. (splice connection in motor box) Motor is outside in C1D2
Termination box same scenario as above. (terminal block connections).
Any examples of E 2 & E 4 would be helpful.
Thanks
Bob