scottmarston
Member
- Location
- Meridian, ID
I’m trying to familiarize myself with the installation of Instruments and the field wiring rules required from my enclosure to the instruments in a Class I, Division II application. I will be running wires from a non-classified area to a Class I, Division II area. My I/O cards are 24VDC, Allen Bradley and are rated to be installed into a Class I, Division II environment. I have analog inputs, analog outputs, 24VDC inputs, 24VDC outputs and RTDs. Here’s my question:
If my instruments are rated for Class I, Division II and my I/O cards are rated for Class I, Division II, is the wiring between them considered Class I, Division II by proxy, if sized correctly (the plant requires a minimum of 16AWG)? If they are both rated for Class I, Division II, wouldn’t that make them a non-incendiary device for that area and by proxy, the field wiring between them would be non-incendive? I would just have to have a seal in the conduit leaving the control panel in the non-classified area out into the classified area and the rest is golden, right?
If my instruments are rated for Class I, Division II and my I/O cards are rated for Class I, Division II, is the wiring between them considered Class I, Division II by proxy, if sized correctly (the plant requires a minimum of 16AWG)? If they are both rated for Class I, Division II, wouldn’t that make them a non-incendiary device for that area and by proxy, the field wiring between them would be non-incendive? I would just have to have a seal in the conduit leaving the control panel in the non-classified area out into the classified area and the rest is golden, right?
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