9
Explosion-Proof Units Only:
How to Seal Killark
®
Box Conduit with Fiber and
Sealing Compound to Help Protect Against
Explosions (Explosion-Proof Units Only):
The purpose of the procedure that follows is to build fiber
rope dams on the left and right hubs of the horizontal conduit.
The fiber rope damns will surround conduit wiring that is
housed inside the horizontal conduit.
When both the left and right fiber rope dams have been
pressed into place, sealing compound is poured between the
two and forms into an airtight plug.
All of this is done in order to prevent the very real threat of
gas entering the Killark box and a resulting serious explosion.
After the unit wires have been pulled through the horizontal
conduit the following procedure is required:
•
Turn power off at the circuit breaker before proceed-
ing.
•
Place a small amount of sealing compound gran-
ules, enclosed, into a clean mixing vessel. Add
small amounts of water while stirring until a thick
paste is formed, then carefully continue adding
smaller amounts of water until a thick gravy consis-
tency is achieved—NOT WATERY. Discard any
material that becomes too stiff to use. Never
attempt to restore workability by stirring in more
water.
•
Locate silver Killark box, back/top-center of unit.
•
Unscrew conduit domed-cover.
I
NSTALLATION
Unscrew and Remove Cover
L
e
ft
Hub
Cond
u
i
t
D
omed
-
Cover
Cond
u
i
t
Op
en
i
n
g
H
or
i
z
on
t
a
l
Cond
u
i
t
R
i
g
h
t Hub
Figure 1: Sealing the Killark Box
