Description
1.1 Application of this part of SZNS SANS 10142
This part of SZNS SANS 10142 applies to electrical installations of
- a) residential premises,
- b) commercial premises,
- c) public premises,
- d) industrial premises,
- e) prefabricated buildings,
- f) fixed surface installations on mining properties,
- g) construction and demolition site installations,
- h) agricultural and horticultural premises,
- i) caravan sites and similar sites,
- j) marinas, pleasure craft and house boats,
- k) medical locations,
- l) exhibitions, fairs and other temporary installations,
- m) extra low voltage lighting installations,
- n) electrical installations for street lighting and street furniture, and
- o) equipment enclosures (structures that provide physical and environmental protection for telecommunication equipment).
Contents Page
1Scope……………………………………………………………………………………………………………………………………………. 1
1.1 Aspects covered by this part of SANS 10142……………………………………………………………… 1
1.2 Electrical equipment………………………………………………………………………………………………………… 2
1.3 Electrical equipment………………………………………………………………………………………………………… 2
2 Normative references………………………………………………………………………………………………………….. 2
3 Definitions……………………………………………………………………………………………………………………………… 6
4 Compliance……………………………………………………………………………………………………………………………. 21
4.1 Applicable standards……………………………………………………………………………………………………….. 21
4.2 Notices, labels and rating plates……………………………………………………………………………………. 25
5 Fundamental requirements…………………………………………………………………………………………………. 26
5.1 General …………………………………………………………………………………………………………………………………26
5.2 Safety. ……………………………………………………………………………………………………………………………………27
5.3 Basic provisions…………………………………………………………………………………………………………………… 28
5.4 Characteristics……………………………………………………………………………………………………………………… 30
5.5 Prevention of harmful effects……………………………………………………………………………………………. 31
5.6 Environmental conditions. ………………………………………………………………………………………………….31
5.7 Medical locations…………………………………………………………………………………………………………………. 31
5.8 Extra low voltage systems (SELV and PELV)…………………………………………………………………….. 31
6 Installation requirements………………………………………………………………………………………………………… 34
6.1 General circuit arrangements…………………………………………………………………………………………….. 34
6.2 Current-carrying capacity of conductors and cables…………………………………………………….. 35
6.3 Installation of conductors and cables………………………………………………………………………………. 74
6.4 Positioning and fixing of cables. ………………………………………………………………………………………..76
6.5 Wireways. ………………………………………………………………………………………………………………………………..79
6.6 Distribution boards………………………………………………………………………………………………………………. 82
6.7 Protection………………………………………………………………………………………………………………………………. 87
6.8 Circuit-breakers…………………………………………………………………………………………………………………….. 91
6.9 Disconnecting devices…………………………………………………………………………………………………………. 91
6.10 Fuses……………………………………………………………………………………………………………………………………….. 92
6.11 Consumer’s earth terminal………………………………………………………………………………………………….. 93
6.12 Earthing…………………………………………………………………………………………………………………………………… 94
6.13 Bonding………………………………………………………………………………………………………………………………….. 97
6.14 Lighting…………………………………………………………………………………………………………………………………… 98
6.15 Construction………………………………………………………………………………………………………………………….. 101
6.16 Fixed appliances. …………………………………………………………………………………………………………………..103
7 Special installations or locations……………………………………………………………………………………………. 108
7.1 Bathrooms, showers and spas……………………………………………………………………………………………. 108
7.2 Swimming pools, paddling pools, ornamental pools, spas and fountains. ………………..116
7.3 Saunas………………………………………………………………………………………………………………………………………121
7.4 Construction and demolition site installations. ……………………………………………………………….123
7.5 Agricultural and horticultural locations…………………………………………………………………………….. 125
7.6 Caravan parks, mobile homes and marinas……………………………………………………………………… 125
7.7 Medical locations………………………………………………………………………………………………………………….. 127
7.8 Temporary installations…………………………………………………………………………………………………………135
7.9 Extra low voltage lighting installations……………………………………………………………………………… 137
7.10 Stage and theatre equipment…………………………………………………………………………………………….. 140
7.11 Safety and emergency lighting…………………………………………………………………………………………… 141
7.12 High-voltage (HV) apparatus………………………………………………………………………………………………. 145
7.13 Hazardous locations……………………………………………………………………………………………………………… 149
8 Verification and certification……………………………………………………………………………………………………. 152
8.1 Responsibility (see 8.7, section 5 of the test report)…………………………………………………………….. 152
8.2 Installation characteristics………………………………………………………………………………………………………….. 152
8.3 Electricity supply system…………………………………………………………………………………………………………….. 152
8.4 Prospective short-circuit current……………………………………………………………………………………………….. 152
8.5 Inspection………………………………………………………………………………………………………………………………………. 155
8.6 Testing…………………………………………………………………………………………………………………………………………….. 156
8.7 Test reports…………………………………………………………………………………………………………………………………….. 160
9 Annex A………………………………………………………………………………………………………………………………………….. 178
10 Annex B……………………………………………………………………………………………………………………………………… 179
11 Annex C………………………………………………………………………………………………………………………………………. 182
12 Annex D………………………………………………………………………………………………………………………………………. 183
13 Annex E……………………………………………………………………………………………………………………………………….. 189
14 Annex F………………………………………………………………………………………………………………………………………… 190
15 Annex G……………………………………………………………………………………………………………………………………….. 192
16 Annex H……………………………………………………………………………………………………………………………………….. 193
17 Annex I…………………………………………………………………………………………………………………………………………. 194
18 Annex J…………………………………………………………………………………………………………………………………………. 206
19 Annex K………………………………………………………………………………………………………………………………………… 210
20 Annex L. …………………………………………………………………………………………………………………………………………214
21 Annex M……………………………………………………………………………………………………………………………………….. 218
22 Annex N………………………………………………………………………………………………………………………………………… 219
23 Annex O………………………………………………………………………………………………………………………………………… 220
24 Annex P…………………………………………………………………………………………………………………………………………. 221
25 Bibliography…………………………………………………………………………………………………………………………………. 225