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

(b) Unless otherwise advised by the cable manufacturer, a tension
releasing section should be provided for every 100 metres of vertical
cable run.
(4) Use of flexible cable and flexible cord
(a) Flexible cables or flexible cords for connections to portable
appliances or equipment should have suitable length preferably
between 1.5 m to 2 m.
(b) Exposed lengths of flexible cable or flexible cord used for final
connections to fixed equipment or appliance should be as short as
possible.
(c) Every non-flexible or flexible cable or flexible cord for use at low
voltage shall comply with the appropriate recognised standard.
(d ) Where a flexible cord supports or partly supports a pendant
luminaire, the maximum mass supported by the cord should not
exceed the appropriate value indicated below, provided that the
tension of the cord does not act directly on the termination to the
wiring:
Nominal Cross-sectional
Area of Conductor
(mm 2 )
0.5 0
0.75
1.0 0
25D Cable Joint and Cable Termination
Maximum Mass
(kg)
(1) Cable joint
Cable joints of any type along cable runs in final circuits are not allowed.
“Looping-in” wiring system should be used such that the cables or
conductors are properly terminated at the junction box or equipment.
(2) Boxes for cable joint and cable termination
(a) Boxes for the termination and for joining of cables may be of cast
iron, or plastic shell with compound filled and of adequate size.
(b) Where hot compound filling is used, the box should be warmed
thoroughly before the compound is poured to allow total adhesion
between the compound and the box. The compound should then be
allowed to cool and be topped up before the box is closed. No air
pockets should be allowed to form inside the box.
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