Explosion-proof limit switch housing box for Genie EXPF operator series, rated NEMA 7 and NEMA 9 for indoor gas/vapor and indoor dust hazardous environments NEMA 7 and NEMA 9 dual-rated explosion-proof enclosure for indoor hazardous locations. Suitable for Class I Division 1 and 2 (flammable gas/vapor) and Class II Division 1 and 2 (combustible dust) environments. Cast iron or cast aluminum construction providing mechanical integrity to contain internal ignition.
| Feature | Specification |
|---|---|
| Model | 112427.0001.S |
| Item Type | Limit Switch Housing / Explosion-Proof Enclosure Box |
| Voltage | Not specified; voltage rating determined by internal switch contacts - verify with Genie documentation |
| Contact Configuration | Conduit entry hub(s) for explosion-proof rigid conduit connections; internal switch contacts rated for hazardous location use |
| Enclosure Rating | NEMA 7 (indoor hazardous gas/vapor); NEMA 9 (indoor hazardous dust); Class I Div 1/2; Class II Div 1/2 |
| Materials | Cast iron or cast aluminum body (confirm with Genie); explosion-proof threaded conduit hub(s) |
| Dimensions | Not confirmed; typical explosion-proof limit box approximately 4 in x 4 in x 3 in - verify with Genie documentation |
| Mounting | Mounts to Genie EXPF operator frame; exact fastener pattern per EXPF installation documentation |
| Alternate Part Numbers | 1124270001S, 112427-0001-S |
A: NEMA 7 covers indoor locations where ignitable concentrations of flammable gases or vapors may be present. NEMA 9 covers indoor locations where combustible or electrically conductive dust may accumulate. The EXPF box limit is rated for both, making it suitable for dual-classified hazardous sites.
A: Class I refers to locations where flammable gases or vapors are present in sufficient quantities to produce an ignitable mixture. Class II refers to locations where combustible dust is present. Division 1 means the hazardous condition exists under normal operating conditions; Division 2 means it exists only under abnormal conditions.
A: This box limit housing is designed specifically for the Genie EXPF explosion-proof commercial door operator line. It is not a universal part and should not be substituted into non-EXPF operator models without factory authorization.
A: Explosion-proof enclosures use threaded conduit entries, flame-quenching path gaps, and robust cast construction to contain any internal arc or ignition so that it cannot propagate to the surrounding hazardous atmosphere. All wiring must use explosion-proof conduit fittings and sealing fittings per NEC Article 501.
A: Cast iron and cast aluminum are the most common materials for NEMA 7/9 explosion-proof enclosures. Both provide the mechanical strength and tight dimensional tolerances required to contain an internal explosion. Aluminum is lighter; cast iron offers greater durability in high-impact environments. Confirm the exact material with Genie part documentation.