FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
   3.1 General terms
   3.2 Constructional units of ASSEMBLIES
   3.3 External design of ASSEMBLIES
   3.4 Structural parts of ASSEMBLIES
   3.5 Conditions of installation of ASSEMBLIES
   3.6 Insulation characteristics
   3.7 Protection against electric shock
   3.8 Characteristics
   3.9 Verification
   3.10 Manufacturer/User
4 Symbols and abbreviations
5 Interface characteristics
   5.1 General
   5.2 Voltage ratings
   5.3 Current ratings
   5.4 Rated frequency (f[n])
   5.5 Other characteristics
6 Information
   6.1 ASSEMBLY designation marking
   6.2 Documentation
   6.3 Device and/or component identification
7 Service conditions
   7.1 Normal service conditions
   7.2 Special service conditions
   7.3 Conditions during transport, storage and installation
8 Constructional requirements
   8.1 Strength of materials and parts
   8.2 Degree of protection provided by an ASSEMBLY
         enclosure
   8.3 Clearances and creepage distances
   8.4 Protection against electric shock
   8.5 Incorporation of switching devices and components
   8.6 Internal electrical circuits and connections
   8.7 Cooling
   8.8 Terminals for external conductors
9 Performance requirements
   9.1 Dielectric properties
   9.2 Temperature rise limits
   9.3 Short-circuit protection and short-circuit withstand
         strength
   9.4 Electromagnetic compatibility (EMC)
10 Design verification
   10.1 General
   10.2 Strength of materials and parts
   10.3 Degree of protection of ASSEMBLIES
   10.4 Clearances and creepage distances
   10.5 Protection against electric shock and integrity of
         protective circuits
   10.6 Incorporation of switching devices and components
   10.7 Internal electrical circuits and connections
   10.8 Terminals for external conductors
   10.9 Dielectric properties
   10.10 Verification of temperature rise
   10.11 Short-circuit withstand strength
   10.12 Electromagnetic compatibility (EMC)
   10.13 Mechanical operation
11 Routine verification
   11.1 General
   11.2 Degree of protection of enclosures
   11.3 Clearances and creepage distances
   11.4 Protection against electric shock and integrity of
         protective circuits
   11.5 Incorporation of built-in components
   11.6 Internal electrical circuits and connections
   11.7 Terminals for external conductors
   11.8 Mechanical operation
   11.9 Dielectric properties
   11.10 Wiring, operational performance and function
Annex A (normative) - Minimum and maximum cross-section of
        copper conductors suitable for connection to terminals
        for external conductors
Annex B (normative) - Method of calculating the cross-sectional
        area of protective conductors with regard to thermal
        stresses due to currents of short duration
Annex C (informative) - Items subject to agreement between the
        assembly manufacturer and the user
Annex D (informative) - Design verification
Annex E (informative) - Rated diversity factor
  E.1 General
  E.2 Rated diversity factor of an ASSEMBLY
  E.3 Rated diversity factor of a group of outgoing circuits
  E.4 Rated diversity factor and intermittent duty
Annex F (normative) - Measurement of clearances and creepage
        distances
  F.1 Basic principles
  F.2 Use of ribs
Annex G (normative) - Correlation between the nominal
        voltage of the supply system and the rated impulse
        withstand voltage of the equipment
Annex H (informative) - Operating current and power loss of
        copper conductors
  J.1 General
  J.2 Terms and definitions
Annex K (normative) - Protection by electrical separation
  K.1 General
  K.2 Electrical separation
  K.3 Class II equipment or equivalent insulation
Annex L (informative) - Clearances and creepage distances
        for North American region
Annex M (informative) - North American temperature rise limits
Annex N (informative) - Operating current and power loss of
        bare copper busbars
Annex O (informative) - Guidance on temperature rise verification
Annex P (normative) - A method for assessing the short-circuit
        withstand strength of the main circuits of an ASSEMBLY
  P.1 General
  P.2 Definitions
  P.3 Method of interpolation
  P.4 Conditions for application
Bibliography