Code of Practice for the Electricity (Wiring) Regulations - 2009 Edition

(b) Earth continuity across joints of a circuit protective conductor having
adequate cross-sectional area and of same material as the phase
conductors should be installed and connected to maintain the
effectiveness of the earth continuity across every cable joint of the
armoured cable.
(c) PVC insulated armoured cables with copper or aluminium
conductors should be terminated in a gland fitted with an amour
clamp. Provision should be made to enable a watertight seal
between the gland and inner PVC sheath. The gland body should be
provided with an internal conical seating to receive the armour
clamping cone and a clamping nut which should secure the armour
clamping cone firmly to the armour wires ensuring that the armour
wires are tightly clamped between the armour cone and conical
armour seating. The spigot on the gland body should be threaded to
suit standard conduit accessories. A PVC shroud should be fitted to
cover the body of the gland and the exposed armour wires.
(d ) (i) Terminating gland and armour clamp for cables with aluminium
conductors should be made from aluminium. Cores should be
terminated in a hot tinned brass or copper lug, which should be
shaped to suit the sector shape of the conductor. The core
should be tinned, and then soldered into the lug. Alternatively a
compression termination may be used. In such cases, the cores
should be inserted into the sleeve of an aluminium compression
type cable lug. The sleeve should then be compressed onto the
cores by means of a compressing tool. The tool used and the
working procedure adopted should be as recommended by the
cable manufacturer.
(ii) Prior to connection to the terminal, the cable lug should be
painted with an anti-oxidising paste. The anti-oxidising paste
should be suitable for preventing electrolytic action due to
contact between the aluminium lug and copper or brass
terminal, for an indefinite period. Alternatively, copper/
aluminium bimetal cable lugs may be used.
(8) Termination of bonding conductors
(a) (i) A purpose-designed copper connector clamp should be used to
bond the main equipotential bonding conductor to extraneous
conductive parts of the non-electrical services, and should be
used to bond supplementary bonding conductors to exposed
conductive parts or extraneous conductive parts.
(ii) All contact surfaces should be clean and free from nonconducting
materials, such as grease or paint, before the
connector clamp is installed.
162