(1) The operator or site senior executive must ensure the mine has earth leakage protection for each electrical circuit exceeding extra low voltage that—(a) is in an underground mine; or(b) is in a portable, transportable or mobile apparatus; or(c) has an outlet for, or supplies electricity to, a trailing cable or flexible lead.
(2) Subsection (1) does not apply to the following circuits—(a) an electrical circuit—(i) isolated from earth; or(ii) that uses the earth to carry all or part of the normal current of a circuit; or(iii) for which continuity of supply is necessary to maintain safety;(b) a control or lighting circuit of less than 120V a.c.