sec.192Earth leakage protection

### sec.192 Earth leakage protection The electrical engineering manager for an underground mine must ensure each electrical circuit at the mine operating above 55V to earth has earth leakage protection with a rated tripping current of not more than— for a circuit supplying equipment and cables in an ERZ1—500mA; or for a high voltage circuit not mentioned in paragraph (a) —1A; or for a low voltage circuit not mentioned in paragraph (a) —500mA. The electrical engineering manager must ensure the operating time ensures the device cuts off the electricity supply to equipment and cables in an ERZ1, or causes the supply to be cut off, as soon as practicable after the device detects an electrical fault in the circuit. The electrical engineering manager must ensure each circuit supplying portable electrically operated handheld plant— operates at not more than 250V; and has earth leakage current protection of not more than 30mA sensitivity. The site senior executive for the mine must ensure— each circuit supplying a reeling, trailing or feeder cable has— earth continuity protection; and a lockout earth fault current protection device; and if the device is for equipment used in an ERZ1—the device is intrinsically safe. Subsection (1) does not apply to the following— an intrinsically safe circuit; a circuit operating at not more than 55V to earth and fully contained in a NERZ or an explosion-protected enclosure; a circuit isolated from earth. In this section— rated tripping current means the electrical current at which the circuit breaker is set to trip. (sec.192-ssec.1) The electrical engineering manager for an underground mine must ensure each electrical circuit at the mine operating above 55V to earth has earth leakage protection with a rated tripping current of not more than— for a circuit supplying equipment and cables in an ERZ1—500mA; or for a high voltage circuit not mentioned in paragraph (a) —1A; or for a low voltage circuit not mentioned in paragraph (a) —500mA. (sec.192-ssec.2) The electrical engineering manager must ensure the operating time ensures the device cuts off the electricity supply to equipment and cables in an ERZ1, or causes the supply to be cut off, as soon as practicable after the device detects an electrical fault in the circuit. (sec.192-ssec.3) The electrical engineering manager must ensure each circuit supplying portable electrically operated handheld plant— operates at not more than 250V; and has earth leakage current protection of not more than 30mA sensitivity. (sec.192-ssec.4) The site senior executive for the mine must ensure— each circuit supplying a reeling, trailing or feeder cable has— earth continuity protection; and a lockout earth fault current protection device; and if the device is for equipment used in an ERZ1—the device is intrinsically safe. (sec.192-ssec.5) Subsection (1) does not apply to the following— an intrinsically safe circuit; a circuit operating at not more than 55V to earth and fully contained in a NERZ or an explosion-protected enclosure; a circuit isolated from earth. (sec.192-ssec.6) In this section— rated tripping current means the electrical current at which the circuit breaker is set to trip. - (a) for a circuit supplying equipment and cables in an ERZ1—500mA; or - (b) for a high voltage circuit not mentioned in paragraph (a) —1A; or - (c) for a low voltage circuit not mentioned in paragraph (a) —500mA. - (a) operates at not more than 250V; and - (b) has earth leakage current protection of not more than 30mA sensitivity. - (a) each circuit supplying a reeling, trailing or feeder cable has— (i) earth continuity protection; and (ii) a lockout earth fault current protection device; and - (i) earth continuity protection; and - (ii) a lockout earth fault current protection device; and - (b) if the device is for equipment used in an ERZ1—the device is intrinsically safe. - (i) earth continuity protection; and - (ii) a lockout earth fault current protection device; and - (a) an intrinsically safe circuit; - (b) a circuit operating at not more than 55V to earth and fully contained in a NERZ or an explosion-protected enclosure; - (c) a circuit isolated from earth.