S&C Instruction Sheet 662-505 13
Installation
Before connecting the cable terminators to
the aluminum terminal pads, thoroughly wire-
brush aluminum contact surfaces to remove
any dirt or foreign materials as well as natural
surface oxides. Immediately coat both contact
surfaces to one-half inch beyond the joint with
a uniform layer of Penetrox® A. Then, make the
connections as follows. See Figure 8.
(a)
For aluminum connectors
: Use
½
-inch
aluminum or galvanized steel hardware
with two Belleville spring washers (not
furnished) as shown in Detail A of Figure 8.
Before tightening the connecting bolts,
complete the installation of optional cable
guides (where applicable) following the
cable-guide manufacturer’s instructions.
Torque aluminum bolts to the manu-
facturer’s specifi cations. Torque steel bolts
to 50 foot-pounds or, in the absence of a
torque wrench, tighten each bolt until the
Belleville washers are fi at. Then, back off
one-half turn. Do not use lockwashers with
Belleville washers.
(b)
For tinned copper or tinned bronze
connectors
●
: Use
½
-inch galvanized steel
hardware with one Belleville spring washer
(not furnished) against the aluminum
terminal pad and one galvanized steel fi at
washer against the tinned connector as
shown in Detail B of Figure 8. Before
tightening the connecting bolts, complete
the installation of optional cable guides
(where applicable) following the cable-guide
manufacturer’s instructions. Torque the
bolts to 50 foot-pounds or, in the absence of
a torque wrench, tighten each bolt until the
Belleville washer is fl at. Then, back off one-
half turn. Do not use lockwashers with
Belleville washers.
STEP 7.
Connect the cable concentric-neutral ground
wires and the ground pads inside the pad-
mounted gear enclosure to the system ground
facility in accordance with the user’s standard
grounding practice. Use the equivalent of 410
copper cable (or cable sized in accordance with
the user’s standard practice) in either a single or
multiple connection to realize the maximum
momentary rating of the gear. For a multiple
connection, cables smaller than 1/0 copper or
equivalent should not be used.
●
The use of untinned copper or bronze connectors is not recommended .
Fault Indicators
STEP 8.
Optional mounting provisions for fault
indicators (catalog number suffi x “-F1” or “-F2”)
are available. Fault indicators are to be
furnished by the user and installed in
accordance with the manufacturer’s
instructions. If mounting provisions are
specifi ed, mount the fault indicators on the
mounting brackets and attach the associated
sensors to the cables below the cable
terminators.
Completing the Installation
STEP 9.
If applicable, install and connect surge
arresters in accordance with the manu-
facturer’s instructions.
STEP 10.
If any switch barriers were removed to
facilitate cable termination, reinstall them at
this time. Make sure the clearances from the
barriers to energized parts and from the barriers
to terminator skirts conform to the minimum
dimensions specifi ed in Step 6 on page 12.
Figure 8. Terminal-pad connections. See Step 6.
Aluminum
terminal pad
Belleville
spring washers
Aluminum
connector
Detail A
Aluminum
terminal pad
Galvanized steel
flat washer
Belleville
spring washer
Tinned copper or
tinned bronze
connector
Detail B
