12 S&C Instruction Sheet 662-505
Installation
STEP 6.
Make up cable terminations following the cable-
terminator manufacturer’s instructions.
WARNING
While the interior of Manual PMH Pad-Mounted Gear
is protected from direct exposure to the elements, it
is inherently an outdoor environment—and requires
selection and application of cable-terminating
devices accordingly . Terminations must incorporate
adequate leakage distance between the exposed
conductor and the stress-relief cone, across a surface
of non-tracking material (or surface rendered non-
tracking by properly taping with a suitable material) .
Furthermore, to maintain the rated BIL, the following
minimum clearances are required . See Figure 6 on
page 11:
• From energized parts to electrical ground: 6 inches
(152 mm) at 14 .4 kV; 7
½
inches (191 mm) at 25 kV .
• From energized parts to fiberglass-reinforced
polyester barriers: 1 inch (25 mm) at 14 .4 kV;
2
¼
inches (57 mm) at 25 kV
• From terminator skirts to fiberglass-reinforced
polyester barriers:
½
inch (13 mm) at 14 .4 kV;
1
¼
inch (32 mm) at 25 kV .
Two-position cable-terminator adapters are provided
at the fuse hinge assemblies. See Figure 7. These adapters
can be placed in their alternate positions when required
for increased clearance from energized parts to grounded
parts of the cable terminators.
Switch terminal pads are furnished with three mounting
holes. In general, cable terminators may be connected to
the two lower holes in the switch terminal pads. However,
if the pad-mounted gear includes optional cable guides
for switch terminals (catalog number suffix “-M2”), cable
terminators must be connected to the two uppermost holes
in the switch terminal pads. See Figure 5 on page 9.
CAUTION
When connecting cable terminators, avoid placing
any intentional strain on a switch or fuse terminal . It
is important each cable-terminator connector be flat
against the corresponding switch or fuse terminal
pad with the bolt holes in alignment . Do not use the
connecting bolts to pull the cables into alignment .
Figure 7. Fuse assembly showing alternate arrangement of two-
position cable-terminator adapters.
Normal position for
maximum cable-
terminating height
Alternate position for
use when required for
electrical clearance
