MSWPCC54
Member
- Location
- Baltimore, MD
Hello Members,
The company I work for is having some issues with an electrical inspector in New Jersey. We built a switchgear enclosure that has a small walk in areas on both sides that needs to abide by the 2014 NEC. At first this guy told us we needed to separate ALL AC and DC circuits (for example by running all DC in blue conduit). I then responded to him with section 300.3(C). He then brought up section 725.48 and is asking us to identify the class of circuits on all the drawings and their combinations in their respective conduits/raceways etc.
I am relatively new to the industry so I lack some familiarity with the code. I understand what a class 2 and class 3 circuit classification means very well, however class 1 is tripping me up a little bit.
Do ALL control/signaling circuits need to be classified as class 1? For example 120VAC thermostat wiring or wiring to an ammeter?
If so my understanding is these circuits would need to be isolated from power/lighting cables not functionally associated with the control wiring.
Basically I'm looking for some further clarification on what qualifies a circuit as class 1 and any tips on the easiest way to satisfy my inspector.
Thanks
The company I work for is having some issues with an electrical inspector in New Jersey. We built a switchgear enclosure that has a small walk in areas on both sides that needs to abide by the 2014 NEC. At first this guy told us we needed to separate ALL AC and DC circuits (for example by running all DC in blue conduit). I then responded to him with section 300.3(C). He then brought up section 725.48 and is asking us to identify the class of circuits on all the drawings and their combinations in their respective conduits/raceways etc.
I am relatively new to the industry so I lack some familiarity with the code. I understand what a class 2 and class 3 circuit classification means very well, however class 1 is tripping me up a little bit.
Do ALL control/signaling circuits need to be classified as class 1? For example 120VAC thermostat wiring or wiring to an ammeter?
If so my understanding is these circuits would need to be isolated from power/lighting cables not functionally associated with the control wiring.
Basically I'm looking for some further clarification on what qualifies a circuit as class 1 and any tips on the easiest way to satisfy my inspector.
Thanks