9
Installation and Maintenance Instructions
Models 151XST and 151XST-S
Pipe-Mounting the Beacon (151XST)
EXPLOSION HAZARD—To reduce the risk of fire or explosion,
do not install the beacon in a hazardous location if the
operating temperature exceeds the hazardous atmosphere’s
ignition temperature. Before proceeding, consult the product
nameplate and determine the operating temperature of the
beacon.
NOTE:
To comply with NEC Section 300-14, which requires a
minimum of 6 inches (15.25 cm) of free conductor at a junction,
when mounting the Model 151XST, the mounting pipe used to join
the unit to a splice box should be no longer than 10 in (25.4 cm).
The Model 151XST has provisions for mounting a 3/4" pipe and
can be mounted in any position.
1.
Before mounting the beacon, ensure that the mating threads
are clean.
2.
To prevent the ingress of water 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/grounding screw to
ensure proper grounding continuity (Figure 3 on page 13).
3.
See Figure 1 on page 10. Thread the fixture onto the 3/4-inch
pipe and secure it with the set screw.
