We need to feed a Type TC-ER, VFD cable into an explosion proof junction box in a Class I, Division 2 location. While a large portion of the install is in tray, the final run to the exp box is in conduit. We are trying to determine the best method of entry into the box, considering both the need to seal per 501.15(B)(1), and maintaining effectiveness of VFD shielding/cable benefits.
- In looking at the TMCX fittings, it looks like these can be used for type TC-ER cable? I had thought they were only listed for MC-HL. is there any reason i could not transition from conduit and use a TMCX into the box? (note also in looking at the UL sheet, it appears only 1.25 - 2" are listed for TC-ER cable...)
- If we use an EY seal fitting, we'd need to remove cable jacket and pour chico around the conductors - will removing jacketing and separating grounds in the cable, and running conductors immediately to the terminations inside the box nullify the benefits/performance of using the VFD cable? (VFD cable was used largely to allow it to be run in tray for 90% of the run - if we had been running in conduit the whole way, we'd have just run individual conductors.)
- In looking at the TMCX fittings, it looks like these can be used for type TC-ER cable? I had thought they were only listed for MC-HL. is there any reason i could not transition from conduit and use a TMCX into the box? (note also in looking at the UL sheet, it appears only 1.25 - 2" are listed for TC-ER cable...)
- If we use an EY seal fitting, we'd need to remove cable jacket and pour chico around the conductors - will removing jacketing and separating grounds in the cable, and running conductors immediately to the terminations inside the box nullify the benefits/performance of using the VFD cable? (VFD cable was used largely to allow it to be run in tray for 90% of the run - if we had been running in conduit the whole way, we'd have just run individual conductors.)