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Part 2. Cable with graphite coating screen NF C 33-220 (HN 33-S-22)
CABLE PREPARATION AND CABLE SCREEN EARTHING
sheath
1 Cut the cable 5 mm from the centerline of the bushing.
2 Remove the outer sheath for a distance of 130 mm.
3 Remove the copper tape screen and fabric tape to a point 25 mm from
the outer sheath and secure it with a wrap of adhesive tape.
Do not remove the graphite varnish at this stage.
longitudinal
split(s)
4 Cut longitudinal split(s) in the outer sheath to a point 40 mm from the edge.
5 Using a blunt tool, make a slight funnel of the outer sheath to fit the earthing device underneath the sheath.
6 Install the earthing device underneath the outer sheath. Have it protruded by maximum 20 mm.
7 Cleat the outer sheath using the stainless steel straps. Twist straps twice around the cable and fold back the ends
to avoid sharp edges.
8 Apply 2 layers of semi-conductive tape, (50% stretch, 50% overlap), as follows: start taping on
the metal straps (ensure the splits are covered), up to a point 40 mm behind the outer sheath. Without cutting the
tape, apply a second layer back to the start.
9 Remove the core insulation from the conductor for a distance of 30 mm.
a Using an appropriate solvent thoroughly remove the graphite coating up to the semi-conductive
tape.
z Slightly round-off the edge of the core insulation. Do not sharpen in cone-shape.
copper
outer
tape screen
earthing device
with braid
20
40
max
semi-conductive tape
Continue the installation on page 4.
adhesive
graphited core insulation
tape
25
130
interface type A
cleaned core
insulation
40
5
18
5
5
stainless steel straps
round-off
conductor
30
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