Explosion-Proof Conduit Seal - Honeywell SmartLine ST 700 User Manual

12.7.8 Explosion-Proof Conduit Seal

When installed as explosion proof 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 non-incendive 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 before disconnecting or connecting the transmitter wires.
Transmitters installed as explosion proof in Class I, Division 1, Group A Hazardous (classified)
locations in accordance with ANSI/NFPA 70, the US National Electrical Code, with 1/2 inch conduit
do not require an explosion-proof seal for installation. If 3/4 inch conduit is used, a LISTED
explosion-proof seal to be installed in the conduit, within 18 inches (457.2mm) of the transmitter.
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ST 700 SmartLine Pressure Transmitters User's Manual
Revision 13