AS 3015-1993

1 - AS 3015-1993 ELECTRICAL INSTALLATIONS-EXTRA-LOW VOLTAGE D.C. POWER SUPPLIES WITHIN PUBLIC TELECOMMUNICATIONS NETWORKS
4 - PREFACE
5 - CONTENTS
6 - FOREWORD
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 APPLICATION
7 - 1.3 REFERENCED DOCUMENTS
8 - 1.4 DEFINITIONS
8 - 1.4.1 Authorized personnel
8 - 1.4.2 Battery
8 - 1.4.3 Battery cabinet
8 - 1.4.4 Battery room
8 - 1.4.5 Boost-charge (boost)
8 - 1.4.6 Cell
8 - 1.4.7 Charge (of a battery)
8 - 1.4.8 Constant-potential (float) operation
8 - 1.4.9 Convertor
8 - 1.4.10 Equalizing charge
8 - 1.4.11 High ohmic distribution (HOD)
8 - 1.4.12 Lead-acid cell
8 - 1.4.13 Live
8 - 1.4.14 Main service earthing conductor
8 - 1.4.15 May
8 - 1.4.16 Monobloc
8 - 1.4.17 NiCd cell
9 - 1.4.18 Nominal voltage
9 - 1.4.19 Primary d.c. distribution
9 - 1.4.20 Protective earth
9 - 1.4.21 Public telecommunications carrier
9 - 1.4.22 Public telecommunications network
9 - 1.4.23 Restricted access location (RAL)
9 - 1.4.24 Secondary d.c. distribution
9 - 1.4.25 Sealed (valve-regulated) cell
9 - 1.4.26 Service earth bar (service earth link)
9 - 1.4.27 Shall
9 - 1.4.28 Should
9 - 1.4.29 Single point connection (SPC)
9 - 1.4.30 String (of cells)
9 - 1.4.31 Telecommunications facility
9 - 1.4.32 Telecommunications service earth
9 - 1.4.33 Vented (flooded) cell
10 - 1.4.34 Water electrolysis current
10 - 1.5 ALTERATIONS AND ADDITIONS
10 - 1.6 INSPECTION AND CERTIFICATION OF WORK
11 - SECTION 2 BATTERIES
11 - 2.1 GENERAL
11 - 2.2 BATTERY ACCOMMODATION
11 - 2.2.1 General
11 - 2.2.2 Battery layout
12 - 2.2.3 Cell arrangement
12 - 2.2.4 Barriers
12 - 2.2.5 Battery isolation
12 - 2.2.6 Overcurrent protection
12 - 2.3 VENTILATION
12 - 2.3.1 General
13 - 2.3.2 Calculation of ventilation rate
13 - 2.3.3 Batteries in enclosures
15 - 2.3.4 Battery cabinets within buildings
15 - 2.3.5 Boost-charging of vented cells
15 - 2.3.6 Intermediate voltages
16 - SECTION 3 DIRECT CURRENT DISTRIBUTION AND PROTECTION
16 - 3.1 GENERAL
16 - 3.2 CIRCUIT ARRANGEMENT
16 - 3.3 DESIGN REQUIREMENTS
16 - 3.4 INSULATION RESISTANCE
18 - 3.5 OVERCURRENT PROTECTION
18 - 3.5.1 General
18 - 3.5.2 Primary d.c. distribution
18 - 3.5.3 Secondary d.c. distribution
18 - 3.6 SWITCHGEAR AND CONTROLGEAR
18 - 3.7 DISTINGUISHING COLOURS OF CABLES
18 - 3.7.1 Prohibited colours
18 - 3.7.2 Live conductors
18 - 3.8 CONDUCTOR MATERIAL
18 - 3.9 MINIMUM SIZE OF CONDUCTOR
19 - 3.10 CURRENT CARRYING CAPACITY OF CONDUCTORS
19 - 3.11 MAXIMUM DEMAND OF A CIRCUIT
19 - 3.12 DISTRIBUTION VOLTAGE DROP
19 - 3.13 CONDUCTORS IN PARALLEL
19 - 3.14 JOINTS AND TERMINATIONS
20 - 3.15 MECHANICAL PROTECTION AND SUPPORT OF CONDUCTORS
20 - 3.15.1 General
20 - 3.15.2 Busbars
20 - 3.15.3 Cables
20 - 3.16 INSULATION OF CONDUCTORS
20 - 3.16.1 Busbars
20 - 3.16.2 Cables
22 - SECTION 4 SERVICE EARTHING AND BONDING
22 - 4.1 GENERAL
22 - 4.2 EARTHING ARRANGEMENTS
22 - 4.2.1 General
22 - 4.2.2 Service earth bar
22 - 4.2.3 Main service earthing conductor
22 - 4.2.4 Equipotential bonding conductor to protective earth
24 - 4.2.5 Convertor cubicle bonding
24 - 4.2.6 Service earthing conductor (riser)
24 - 4.2.7 Other earthing conductors
24 - 4.3 EARTHING CONDUCTORS
24 - 4.3.1 General
24 - 4.3.2 Installation
24 - 4.3.3 Resistance
24 - 4.3.4 Size
25 - 4.4 SERVICE EARTH BAR
25 - 4.4.1 General
26 - 4.4.2 Location
26 - 4.4.3 Size
26 - 4.5 SERVICE EARTH ELECTRODE SYSTEM
26 - 4.5.1 General
26 - 4.5.2 Resistance to earth
26 - 4.5.3 Materials
27 - APPENDIX A - VENTILATION
27 - A1 GENERAL
27 - A2 DERIVATION OF MINIMUM EXHAUST VENTILATION RATE
28 - A3 SAMPLE VENTILATION RATE CALCULATIONS
30 - APPENDIX B - WORK SAFETY RULES
31 - APPENDIX C - TELECOMMUNICATIONS CARRIER SERVICE EARTHING
31 - C1 GENERAL
31 - C1.1 External earthing
31 - C1.2 Internal earthing
31 - C2 SHARED EARTHING AND EARTH BONDING
32 - C3 FUNCTIONS OF SERVICE EARTH
32 - C3.1 External
32 - C3.2 Internal
32 - C4 MAIN SERVICE EARTHING CONDUCTOR
33 - C5 THE SERVICE EARTH ELECTRODE SYSTEM
33 - C5.1 General
33 - C5.2 Materials
33 - C5.3 Calculation of earth resistance
34 - C6 ALTERNATING CURRENT CONSIDERATIONS

Sets out requirements for the design and installation of telecommunications ELV (d.c.) power supplies which are used in restricted premises by telecommunications carriers in the provision of public telecommunications networks.

This Standard sets out requirements for telecommunications ELV d.c. power supplies in restricted access locations of premises which are used by licensed public telecommunications carriers in the provision of public telecommunications networks, and specifies the essential requirements for personal safety and safety from fire while maintaining the viability of the public telecommunications network.

Under Revision see DR 02504 First published as AS 3015(Int)-1991.Revised and issued as AS 3015-1993. First published as AS 3015(Int)-1991. Revised and issued as AS 3015-1993.