I am working on a new project in a Class 1 Div 2 environment. I am trying to develop a field wiring strategy and I have some questions I was hoping I could get help with. I have been reading Article 501.10 and 501.15 of the 2017 NEC and my head is spinning...
Background:
We have an MCC room that is outside of the Class 1 Div 2 area. The MCC will contain the VFDs and a 24 VDC power bank. In the Class 1 Div 2 area we plan to have remote I/O panels that will be Class 1 Div 2 compliant and will be fed 24VDC power and Ethernet network communications from the MCC. We also plan to run VFD cable from the MCC to the motors/pumps in the classified area. We want to use cable tray as much as possible to reduce the amount of conduit.
Questions:
If I run vaportight (TC-ER) VFD cable and 24VDC cable from the MCC to the classified area, do I need to seal at the boundary? The NEC calls out different sealing requirements for multi-conductor cables that I don't 100% understand.
If the 24VDC power bank is built using non-incendive power supplies, can I consider the field wiring to the remote panels non-incendive as well?
Thanks!
Background:
We have an MCC room that is outside of the Class 1 Div 2 area. The MCC will contain the VFDs and a 24 VDC power bank. In the Class 1 Div 2 area we plan to have remote I/O panels that will be Class 1 Div 2 compliant and will be fed 24VDC power and Ethernet network communications from the MCC. We also plan to run VFD cable from the MCC to the motors/pumps in the classified area. We want to use cable tray as much as possible to reduce the amount of conduit.
Questions:
If I run vaportight (TC-ER) VFD cable and 24VDC cable from the MCC to the classified area, do I need to seal at the boundary? The NEC calls out different sealing requirements for multi-conductor cables that I don't 100% understand.
If the 24VDC power bank is built using non-incendive power supplies, can I consider the field wiring to the remote panels non-incendive as well?
Thanks!