1E EMH Instrument Housings Cl. I, Div. 1 & 2, Group D Cl. II, Div. 1, Groups E, F, G Cl. II, Div. 2, Groups F, G Cl. III NEMA 3, 7D, 9EFG, 12 Explosionproof Dust-Ignitionproof Raintight Wet Locations Applications: EMH instrument housings are used: • To enclose 2V2" or 31/2" diameter round, flush rim-mounting meters, whose scale or dial would be visible in the 25/8" diameter glass window. Typical types of instruments or meters are ammeters, voltmeters, etc. • In specific hazardous atmospheres such as encountered in oil refineries, chemical plants, paint and varnish manufacturing plants, certain hazardous metal finishing areas, coal processing locations, granaries and grain processing plants Features: • Sight-glass in cover permits viewing of instrument dial or setting. • Enclosures are non-magnetic, available in surface mounting and flush panel mounting. The cylindrical extension of the cover opening on the flush bodies will project through a hole in panel. Thickness of panel must not exceed V4" to insure flametight assembly of cover threads with body threads. • Mounting plates and posts in bodies support the instrument close to the heavy glass window in cover. Maximum depth of instrument extending from outboard end of posts towards the back wall of enclosure body is 3". There is ample wiring space in back of instruments. • Bodies have bosses on all four sides and back for drilling and tapping of conduit entrances. • Dead end and through feed arrangements for 3/4" rigid conduit are standard listings. Certifications and Compliances: • NEC/CEC: Class I, Division 1 & 2, Group D Class II, Division 1, Groups E, F, G Class II, Division 2, Groups F, G Class III • NEMA/EEMAC: 3, 7D, 9EFG, 12 • UL Standard: 1203 • CSA Standard: C22.2 No. 30 Standard Materials: • Bodies - copper-free aluminum • Covers - copper-free aluminum • Windows - heat strengthened plate glass Standard Finishes: • Natural Instrument Housings Style Conduit Openings Size Cat. # One in Side EMH521 20000 Standard Meters Housed in EMH511, EMH521f Manufacturer Model Size tType-Round Flush Options: • Other conduit hub sizes and arrangements can be furnished. Standard Meters Housed in EMH533, EMH534 Manufacturer Model Size Type Square Flush Rect. Flush www.crouse-hinds.com US: 1-866-764-5454 CAN: 1-800-265-0502 Copyright© 2013 Eaton’s Crouse-Hinds Business