Safety, Health and Welfare at Work (General Application) Regulations 2007
Connections and cables.
82. An employer shall ensure that—
(a) an electrical joint and connection is of adequate construction as regards conductance, insulation, mechanical strength and protection so as to prevent danger,
(b) where a cable is used in construction work or in external quarrying operations, it is appropriately protected and insulated for the voltage of the cable to prevent danger and
(c) a cable for portable equipment—
(i) is connected to the equipment and to the system either by efficient permanent joints or by a properly constructed connector, and
(ii) is arranged so that tension in the cable cannot be transmitted through the conductors to the terminals at either end of the cable.