L
OOP
D
ETECTOR
H
ANDBOOK
667/HE/20663/000
Issue 13
Page 42
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Remove the outer insulation and break off the armour by repeated
bending.
*
Cut through the outer insulation 50 mm from the end of the armour
without cutting into the armour.
*
Remove outer insulation.
*
Terminate the bedding so that 10 mm projects beyond the armour.
*
Slide a worm drive hose clip over the cable. Open the armour and
position the earthing band underneath. Lay the earthing wire end with the
armour and bring the worm drive hose clip forward to secure the earthing wire
and armour down onto the earthing band. Tighten the clip to achieve a good
mechanical and electrical joint.
For non-armoured cable cut through the outer insulation of one cable
approximately 120 mm from the end to reveal the inner cores with their
insulation.
Repeat for the other cable end.
Cut cable cores to length ensuring that the joints will be staggered and crimp
using blue crimps.
Insulate each crimped joint as required.
Cut the stepped ends of the shell halves so that they fit over the outer
insulation of the cable without interference, but at the same time, giving
minimum clearance in order to avoid eccentricity.
Check, and adjust as necessary, the clearances between the joint
components and the joint components and the shell.
Clean the outer insulation at the box entry positions with a dry cloth. Position
the box shells centrally round the joint and secure them together by hand,
tightening the cable ties provided, ensuring that the tightening does not distort
the half shells and thus destroy the resin seal. Remove the backing tape from
the sealing tape provided and wrap the sealing tape round each stepped end
and stretching it sufficiently to form a seal between shells and outer insulation.
Mix the resin in accordance with the instructions given in section 3.2.3 and
pour resin into the box through the central opening until the box is full.
Fit the central filling cover plate by bending it slightly along its length and
snapping it into position.
If the joint is not positioned at its final location prior to pouring the resin it must
be left to cure before being placed in its final location.
3.2.2
Feeder Cable to Loop Tails using the BICC MPJ Series Joint
Assumes MPJ1 and MPJ2 jointing kit used.
Prepare feeder cable as described in section 3.2.1.
Cut cable cores and detector loop tails to length ensuring that the joints will be
staggered and crimp using blue crimps.
Insulate each crimped joint as required.