INTRODUCTION
0 Principles of safety
0.1 General principles of safety
0.2 Hazards
0.3 Materials and components
1 General
1.1 Scope
1.2 Definitions
1.3 General requirements
1.4 General conditions for tests
1.5 Components
1.6 Power interface
1.7 Markings and instructions
2 Protection from hazards
2.1 Protection from electric shock and energy
hazards
2.2 SELV circuits
2.3 TNV circuits
2.4 Limited current circuits
2.5 Limited power sources
2.6 Provisions for earthing and bonding
2.7 Overcurrent and earth fault protection in
primary circuits
2.8 Safety interlocks
2.9 Electrical insulation
2.10 Clearances, creepage distances and distances
through insulation
3 Wiring, connections and supply
3.1 General
3.2 Connection to a.c. mains supplies
3.3 Wiring terminals for connection of external
conductors
3.4 Disconnection from the a.c. mains supply
3.5 Interconnection of equipment
4 Physical requirements
4.1 Stability
4.2 Mechanical strength
4.3 Design and construction
4.4 Protection against hazardous moving parts
4.5 Thermal requirements
4.6 Openings in enclosures
4.7 Resistance to fire
5 Electrical requirements and simulated abnormal
conditions
5.1 Touch current and protective conductor current
5.2 Electric strength
5.3 Abnormal operating and fault conditions
6 Connection to telecommunication networks
6.1 Protection of telecommunication network service
personnel, and users of other equipment
connected to the network, from hazards in the
equipment
6.2 Protection of equipment users from overvoltages
on telecommunication networks
6.3 Protection of the telecommunication wiring
system from overheating
Annex A (normative) Tests for resistance to heat and fire
Annex B (normative) Motor tests under abnormal conditions
(see 4.7.2.2 and 5.3.2)
Annex C (normative) Transformers (see 1.5.4 and 5.3.3)
Annex D (normative) Measuring instruments for touch-current
tests (see 5.1.4)
Annex E (normative) Temperature rise of a winding (see 1.4.13
and 4.5.1)
Annex F (normative) Measurement of clearances and creepage
distances (see 2.10)
Annex G (normative) Alternative method for determining
minimum clearances
Annex H (normative) Ionizing radiation (see 4.3.13)
Annex J (normative) Table of electrochemical potentials (see
2.6.5.6)
Annex K (normative) Thermal controls (see 1.5.3 and 5.3.7)
Annex L (normative) Normal load conditions for some types of
electrical business equipment (see
1.2.2.1 and 4.5.1)
Annex M (normative) Criteria for telephone ringing signals
(see 2.3.1)
Annex N (normative) Impulse test generators (see 2.10.3.4,
6.2.2.1 and G.5)
Annex P (normative) Normative references
Annex Q (informative) Bibliography
Annex R (informative) Examples of requirements for quality
control programs
Annex S (informative) Procedure for impulse testing (see
6.2.2.3)
Annex T (informative) Guidance on protection against ingress
of water (see 1.1.2)
Annex U (normative) Insulated winding wires for use without
interleaved insulation (see 2.10.5.4)
Annex V (normative) AC power distribution systems (see 1.6.1)
Annex W (informative) Summation of touch currents
Annex X (informative) Maximum heating effect in transformer
tests (see C.1)
Annex ZA (normative) Normative references to international
publications with their relevant
European publications
Annex ZB (normative) Special national conditions
Annex ZC (informative) A-deviations
Index
Figures
Tables