matt_verrando
Member
- Location
- Ocala, FL, USA
NFPA 820 defines the boundaries for Class I, Division 1 & 2 areas in and around a wet well of a sewage lift station. The Conduit that route into the wet well are open on the wet well side to allow the float switch and pump feed cables (SO Cords) to be routed inside the wet well. An explosionproof seal fitting is required in each of these conduit between the NEMA-3R control panel and the wet well. It is my interpretation that all conduit between the seal fitting and the wet well is explosion proof regardless of the conduits location relative to the NFPA 820 boundaries. Based on this, a junction box installed in the raceway between the seal fitting and the wet well needs to be rated Class I, Division 1, regardless of location to the wet well.