94Earthing

94 Earthing (1) A person in control of a low voltage electrical installation that receives electricity distributed by a distribution entity must do all that is reasonably practicable to ensure the earthing for the installation complies with the requirements for an earthing and protection system that applies to the distribution entity under this (2) The works of a distribution entity must incorporate an earthing and protection system, in accordance with the Wiring Rules and any requirement specified by the operator of the transmission or distribution network to which the installation is, or will be, connected, that is capable of ensuring the following:

Electrical Safety Regulations 2024 56 (a) reliable passage of fault current; (b) reliable passage of single wire earth return load currents to ground or source; (c) reliable operation of circuit protection devices; (d) safe step, touch and transfer potentials for all electrical (e) appropriate coordination with the earthing and protection systems of any other distribution entity; (f) protection against likely mechanical damage, inadvertent interference and chemical deterioration; (g) mechanical stability and integrity of connections. (3) Without limiting subregulation (2), the earthing and protection system referred to in that subregulation must comply with the following requirements: (a) if the multiple earth neutral system of earthing is used – the neutral conductor of the system must be effectively earthed; (b) each non-current carrying exposed conductive part of an electric line or generating plant must be effectively earthed; (c) each non-current carrying exposed conductive part of a substation must be effectively earthed; (d) the system must be tested as soon as practicable after its installation to prove its effectiveness; (e) any high voltage electric line must be protected by a suitable fuse, circuit breaker or equivalent device. (4) Earthing is not required under subregulation (3)(b) or (c) if the distribution entity considers that earthing is not appropriate for safety reasons in accordance with a recognised industry practice.

Electrical Safety Regulations 2024 57