Figure 17 Ground Connection For Lightning Protection - Honeywell ST 3000 User Manual

4— Installation - Wiring ST 3000 Transmitter
Lightning protection
When your transmitter is equipped with optional lightning protection (option LP), you must connect a wire
from the transmitter to ground as shown in Figure 17 to make the protection effective. We recommend that
you use a size 8 AWG (American Wire Gage) or (8.37mm
Conduit seal
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.
ATTENTION
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.
36

Figure 17 Ground Connection for Lightning Protection.

ST 3000 HART Transmitter Release 300 User Manual
2
) bare or green covered wire.
Electronics
Housing
Connect to
Earth Ground
10/05