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1.
2.
78 Electrical installation
3.
6. Strip the cable ends and conductors. When connecting to the drive I/O, also remove
4.
the shield along with the outer sheathing, and use electrical tape or shrink tubing to
5.
contain the strands. Elsewhere, twist the outer shield strands into a bundle, crimp a
lug onto it and connect it to the nearest chassis grounding point.
Remove shrouding to access the cable entries and trunking inside the cubicle.
Run the control cables into the cubicle. If possible, arrange for a 360° grounding
of the cable shield at the cable entry.
If the outer surface of the shield is non-conductive, turn the shield inside out as
shown below and wrap copper foil around the cable to keep the shielding
continuous. Do not cut the grounding wire (if present).
A
B
2
1
Run the cables to the control unit (or other connection point). Use the existing
trunking wherever possible.
Cut the cables to suitable length.
Strip the cable ends and conductors. When connecting to the drive I/O, also remove
the shield along with the outer sheathing, and use electrical tape or shrink tubing
to contain the strands. Elsewhere, twist the outer shield strands into a bundle,
crimp a lug onto it and connect it to the nearest chassis grounding point.
1
4
A
Stripped cable
C
B
Conductive surface of the shield exposed
C
Stripped part covered with copper foil
1
Cable shield
2
2
Copper foil
3
4
3
Shielded twisted pair
4
Grounding wire
5
Copper cable
2
3
5
Electrical installation 69
1
Keep as short as possible
2
SHIELD*
If no dedicated "shield" connect-
3
or is provided, ground the inner
cable shields to the chassis.
At the other end of the cable,
leave the shield unconnected, or
4
connect it to ground via a capa-
citor with a value of a few nano-
farads.
Where grounding clamps are not
available, twist the shield
strands into a bundle, crimp a
5
lug terminal onto it and fasten
the lug to the chassis. Secure the
cable into place with eg. cable
ties.
11
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