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01.4IB.46300
Installation
Figure 15 Dead End Bus Joint Insulation
“C”
Min
50 (12.7)
Min
“B” Layers - 1/2 LAP
Pre-Insulation Epoxy Insulation
Thermoplastic Sleeving or Tape Insulation
Apply RB Putty Sparingly
to Grade-Out and Round Off
Pre-Insulation
“A”
“B”
Crisscross Tape in a
Figure Eight Pattern to
Fully Cover End
1) Cut and Apply 1-Strip of
Tape to Form a Boot Over End
2) Apply RB Putty Sparingly
to Round Off End of Bar
3) Continue with “A” Layer
of HV Tape.
Table J Insulation of Dead End Bus Bar Joint
Insulation
Level (kV)
Inner Filler
“A”
Outer Wrap
“B”
“C”
(inches)
Approx. Number of Rolls
per Joint of HV Tape ∆
2” or 3”
Bars
4” or 6”
Bars
5 & 7.2
RB Putty* &
3 Layers HV Tape ∆
2 Layers
HV Tape ∆
3
1/2 Roll RB Putty *
1 Roll HV Tape ∆
1 Roll RB Putty *
2 Rolls HV Tape ∆
Note:
* Electrical grade rubber based putty
0282A3529 P008 in roll form will be
used to grade voids and smooth out
sharp edges of joints. This putty has
no insulation value.
1 roll is 1/8” x 1½” x 5’ long.
∆ HV Tape 0282A3529 P004 roll
is .030” x 2” x 30’ long. Apply with
mastic side down.
2) Applying PVC Boots
a. Prepare all joints as outlined under
Ch 4 Installation, I. Connections.
b. Place the PVC boot over the joint.
The boot should fit snugly around all
conductors, and flanges must contact
each other in a smooth joint.
c. Secure the boot with the furnished
nylon wire ties to complete the joint
insulation.
Note:
The PVC insulation boots are
furnished for standard configurations.
Special configuration conditions may
require taped joints if PVC boots are
not available.
d. Replace all covers previously removed.
3) Cleaning Bus Insulation
The main bus bar is insulated with a high
temperature thermoplastic or thermoset
material that provides dielectric and
mechanical properties. Clean the insulation
to provide optimum insulation properties.
!
CAUTION
Use alcohol in a well-ventilated area to avoid
inhaling vapors.
!
CAUTION
Do NOT use any commercial soap-based
or detergent-based cleaner because it may
leave an electrical conducting residue as it
dries. Do NOT use hydrocarbon or petroleum
based solvents because it may damage the
insulation material. Do NOT use carbon
tetrachloride. Avoid prolonged exposure to
solvent vapors. Use solvents in a
well-ventilated area.
Only use denatured alcohol or isopropyl
alcohol to clean the insulation. Wear
protective gloves and goggles and clean
the main bus bar in a well ventilated area.
Wipe dirt or other foreign matter from the
insulation with a clean cloth saturated with
only denatured or isopropyl alcohol.
