14 S&C Instruction Sheet 662-505
Installation
STEP 11. Check functional operation of key interlocks, if
furnished.
CAUTION
When optional key interlocks are furnished,
duplicate keys are provided for use during
installation. To maintain the integrity of the
key-interlock scheme, duplicate keys must
be destroyed or made accessible only to
authorized persons.
Note: Key interlocks are not security locks
and are not a substitute for padlocks.
CAUTION
Use of undue force in an attempt to open
a door contrary to the correct sequence
dictated by the key-interlock scheme may
damage the door latching mechanism.
Be sure the interlocks are in their correct
positions to allow opening the door.
STEP 12. Be sure the doors open and close without
binding and the shimming of the pad-mounted
gear enclosure is adequate. A resilient closed-
cell gasket on the bottom ange of the
enclosure protects the nish from being
scratched during installation and isolates it
from the alkalinity of a concrete foundation.
This gasket also helps to seal the enclosure to
the foundation to guard against entry of
rodents, insects, or weeds, and to discourage
tampering.
In the event the gasket cannot compensate
for an uneven foundation, grout the bottom of
the enclosure as necessary. Any grout applied
should be recessed enough to permit caulking.
To complete the installation, caulk around the
bottom of the enclosure with a weatherproof
compound applied with a standard caulking
gun. A room-temperature vulcanizing (RTV)
silicon-rubber compound is recommended.
Apply a suitable compound to fill the spaces
between the cable and the conduit, and cap all
empty conduits to prevent the entry of rodents.
STEP 13. Before walking away:
(a) Remove the lifting tabs and replace the bolts
to plug the blind-tapped holes.
(b) Check the interior of the pad-mounted gear.
Remove all foreign materials and tools that
may have been mislaid, and sweep the
interior clear of debris.
(c) Remove the tie wraps that secure the dual-
purpose barriers to the inside of the door.
(d) Wipe barriers, insulators, switches, fuses,
and terminators clean with a mineral-spirits
solvent and dry with a clean cloth.
(e) Hang dual-purpose front barriers in their
normal, suspended positions. Also install
optional inner barrier panels, if furnished.
WARNING
Dual-purpose front barriers must be wiped
clean before placing them in the “slide-in”
position. In addition, do not leave any
dual-purpose front barriers in the “slide-in”
position for more than one week. These
barriers are intended for temporary use
only. If the barriers are left in the “slide-in”
position for extended periods of time, there
is the possibility of corona discharge to the
barriers. Prolonged exposure to corona
discharge may damage the barriers and
result in a flashover or injury.
(f) Store spare SMU-20 Fuse Units or SM-4
Rell Units (as applicable) in the fuse-
storage racks inside the fuse-compartment
doors. Storage for Fault Fiter Electronic
Power Fuses or current-limiting fuses
cannot be provided in these racks.
(g) Wipe down the exterior of the enclosure
with a clean, damp cloth. To preserve the
integrity of the surface, renish any
scratches or abrasions with S&C touch-up
paint and red-oxide primer which are
available in aerosol spray cans. Order
catalog number 9999-058 for olive-green
nish, 9999-080 for light gray nish, and
9999-061 for red-oxide primer. No other
nish or primer is approved. The area to be
touched up should be cleaned to remove all
oil and grease. Sand the area, removing any
traces of rust that may be present, and make
sure that all edges are feathered before
applying primer.
At completion of these installation instructions, refer
to S&C Instruction Sheet 662-510 for the operating
instructions.
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