Pub.: 42004-679L2D
M
ODEL
DEX-10
X AND
DEX-20
X
D
RILLER
’
S
I
NTERCOM
S
TATIONS
Page 5 of 13
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Mounting
The station consists of two enclosures that
are connected by a union. The mounting
location must be a flat, vertical surface that
provides proper clearance, rigidity and
strength to support the station.
The suggested mounting height for stations is
54 inches (137 cm) up to the center of the
factory-sealed enclosure.
To maintain the explosion-proof integrity of
these stations, they are designed with all
mounting hardware located outside the
enclosures. Refer to Figure 3 for mounting
hole and slot dimensions.
Securely fasten the factory-sealed and
termination enclosures to the mounting
location using steel mounting bolts and
washers, or washer-head bolts (hardware not
included).
Conduit Installation
Install the conduit using an approved
electrical conducting-type lubricant on the
threads. The termination enclosure on the
station has one conduit entry on each side
and two on the bottom of the enclosure.
The UL-approved Driller’s Intercom models contain ¾-inch NPT conduit entries. The bottom entries are
plugged from the factory and can be removed to allow use of the entry. Refer to Figure 2 for locations.
All unused conduit openings must be plugged using a close-up plug approved for the specific hazardous
location where the enclosure is used. All conduit connections must meet minimum thread engagements
as specified by the applicable electrical codes.
Figure 3. Rear view showing mounting slots