AS 4242-1994

1 - AS 4242-1994 EARTHMOVING MACHINERY AND ANCILLARY EQUIPMENT FOR USE IN MINES - ELECTRICAL WIRING SYSTEMS AT EXTRA-LOW VOLTAGE
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 APPLICATION
6 - 1.3 REFERENCED DOCUMENTS
6 - 1.4 DEFINITIONS
6 - 1.4.1 Active conductor
6 - 1.4.2 Cable
6 - 1.4.3 Cable core
7 - 1.4.4 Extra-low voltage
7 - 1.4.5 Live parts
7 - 1.4.6 Machine
7 - 1.4.7 Mine
7 - 1.4.8 Protection point
7 - 1.4.9 Overcurrent protective device
7 - 1.4.10 Quarry
8 - SECTION 2 DESIGN AND INSTALLATION
8 - 2.1 ENGINEERING PRACTICE
8 - 2.2 FIXINGS, FASTENINGS AND SUPPORTS
8 - 2.3 GENERAL PROTECTION AGAINST DAMAGE
8 - 2.4 PROTECTION OF LIVE PARTS
8 - 2.5 MECHANICAL PROTECTION OF CABLES, CONDUCTORS AND WIRING LOOMS
8 - 2.6 SEGREGATION OF WIRING SYSTEMS
8 - 2.7 UNUSED EQUIPMENT AND CABLES
9 - 2.8 MANUALS AND CIRCUIT DIAGRAMS
9 - 2.9 LABELLING
9 - 2.9.1 Circuit identification
9 - 2.9.2 Cable marking
9 - 2.9.3 Jump-starting
9 - 2.9.4 Battery isolator
10 - SECTION 3 GENERAL ARRANGEMENT, CONTROL AND PROTECTION
10 - 3.1 CIRCUITS NOT PROTECTED
10 - 3.2 GENERAL CONSIDERATIONS
10 - 3.3 SIZE AND TYPE OF CABLE AND CONDUCTORS
10 - 3.4 CURRENT RATING OF CONTROL DEVICES
10 - 3.5 PROTECTIVE DEVICES
10 - 3.6 LOCATION OF PROTECTIVE DEVICES
11 - 3.7 CONTROL OF CIRCUITS
11 - 3.7.1 Isolation of fire protection circuits
11 - 3.7.2 Battery isolator switch
11 - 3.8 PROTECTION OF CIRCUITS
11 - 3.9 SPECIFIC CABLES
12 - SECTION 4 SPECIFIC REQUIREMENTS
12 - 4.1 EMERGENCY CIRCUITS
12 - 4.2 JUMP-START FACILITIES
12 - 4.3 ALTERNATOR CHARGING CIRCUITS
12 - 4.4 TAPPING OF BATTERIES
12 - 4.5 ARTICULATED VEHICLES
12 - 4.6 LIGHTING CIRCUITS
12 - 4.7 BATTERIES
12 - 4.8 STARTING CIRCUITS
13 - 4.9 LOCATION OF RELAYS AND SWITCHES
13 - 4.10 ENGINE SHUT-DOWN IN AN EMERGENCY
13 - 4.11 CONNECTIONS TO THE MACHINE FRAME
13 - 4.12 CONNECTIONS TO COMMON TERMINAL

Sets out requirements for the design, installation, maintenance and servicing of electrical wiring systems of earth-moving machinery and ancillary equipment for use in open-cut or underground mines. Relates to wiring systems of the automotive type operated at extra-low voltage.

This Standard specifies requirements for the design, installation, maintenance and servicing of electrical wiring systems of earth-moving machinery and ancillary equipment for use in mines. It relates to wiring systems of the automotive type operated at extra-low voltage.The Standard generally applies to earth-moving machinery and ancillary equipment, incorporating internal combustion engines for motive power or other purposes such as drilling or pumping, for use in open-cut and in underground mines. However, where intended for use in underground coal mines, additional requirements may apply.The Standard does not apply to machines or equipment intended for use in quarries.

First published as AS 4242-1994.