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and dust, apply conductive sealant to the conduit threads prior to mounting. If non-conductive
sealant is used, the enclosure must be earthed via the provided internal grounding wire/ground-
ing screw to ensure proper grounding continuity. In high-humidity environments when units are
mounted dome down, condensation may occur in the conduit system. Use properly rated conduit
seals/drains to prevent moisture from entering the fixture. Thread the fixture onto the 3/4" pipe
and secure with the set screw.
The dome guard (Part #K8449090) may be used as an accessory. It is mounted on the
154XST using the two supplied #8-32 screws. Adjust the tension on the screws
until the dome guard is square with the housing.
C. Electrical Connections
This is a four-wire device, and, when installed, all four wires must be termi-
nated. Failure to terminate both red and both black wires will result in a shock
or fire hazard.
The 154XST is provided with four leads; two red, and two black. To achieve electrical supervi-
sion, connect one red (+) lead to the positive side of the incoming power source and the other
red (+) lead to the outgoing power source. Likewise, connect one black (–) lead to the negative
side of the incoming power source, and the other black (−) lead to the negative side of the
outgoing power source.
If required, the green screw in the housing is provided for connection to an earth ground
(Figure 1). To gain access to the screw, the power supply assembly can be removed.
This unit is polarity sensitive, and may be damaged by incorrect electrical hookup. Polarity must be
observed for proper operation. In addition, damage will result if the voltage rating is exceeded.
III. MAINTENANCE
To prevent ignition of hazardous atmospheres, disconnect the fixture from the
supply circuit before opening. Keep tightly closed when in operation.
SAFETY MESSAGE TO MAINTENANCE PERSONNEL
Listed below are some important safety instructions and precautions you should follow:
• Read and understand all instructions before operating this system.
• Any maintenance to the light system must be done with the power turned off.
• Never alter the unit in any manner. Safety in hazardous locations may be endangered if additional
openings or other alterations are made in units specifically designed for use in these locations.
• The nameplate, which may contain cautionary or other information of importance to maintenance
personnel, should not be obscured if exterior of housings used in hazardous locations are painted.
• Broken globes can lead to explosions which could result in serious injury or death. If the globe is
damaged in any way, the complete globe assembly MUST be replaced.
A. Cleaning the Enclosure
Maintenance procedures sometimes require fixtures to be hosed down for good housekeeping.
The fixture should be cleaned periodically to maintain maximum light output. Only mild, non-
abrasive cleaning agents should be used. The water force applied by a hose must not exceed 65
gallons per minute from a 1" diameter hose at a distance of 10 feet. The glass globe should be
regularly inspected for scratches and chips, and, if damaged, must be replaced.
WARNING
NOTE
WARNING
NOTE
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