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36 SMV 3000 Transmitter User’s Manual 1/99
4.5 Wiring SMV 3000 Transmitter, Continued
Conduit seals and
Hazardous Location
Installations
Transmitters installed as explosionproof in a Class I, Division 1, Group A
Hazardous (Classified) Location in accordance with ANSI/NFPA 70, the
US National Electrical Code (NEC), require a “LISTED” explosionproof
seal to be installed in the conduit, within 18 inches of the transmitter.
Crouse-Hinds® type EYS/EYD or EYSX/EYDX are examples of
“LISTED” explosionproof seals that meets this requirement.
Transmitters installed as explosionproof in a Class I, Division 1, Group B,
C or D Hazardous (Classified) Locations do not require an explosionproof
seal to be installed in the conduit.
NOTE: Installation should conform to all national and local electrical
code requirements.
WARNING
When installed as explosionproof in a Division 1 Hazardous Location,
keep covers tight while the transmitter is energized. Disconnect power to
the transmitter in the non-hazardous area prior to removing end caps for
service.
When installed as nonincendive equipment in a Division 2 Hazardous
Location, disconnect power to the transmitter in the non-hazardous area,
or determine that the location is non-hazardous prior to disconnecting or
connecting the transmitter wires.