BS 7769-1.1:1997

Committees responsible
National foreword
Introduction
1 General
  1.1 Scope
  1.2 Normative references
  1.3 Symbols
  1.4 Permissible current rating of cables
2 Calculation of losses
  2.1 AC resistance of conductor
  2.2 Dielectric losses (applicable to a.c. cables only)
  2.3 Loss factor for sheath and screen (applicable to
       power frequency a.c. cables only)
  2.4 Loss factor for armour, reinforcement and steel
       pipes (applicable to power frequency a.c. cables
       only)
Tables
1 Electrical resistivities and temperature
       coefficients of metal used
2 Skin and proximity effects - Experimental values for
       coefficients kx and kp
3 Values of relative permitivity and loss factors
       for the insulation of high-voltage and
       medium-voltage cables at power frequency
4 Absorption coefficient of solar radiation for
       cable surfaces

Applicable to steady-state operation of cables at all alternating voltages and direct voltages up to 5 kV, buried as well as in air. This section provides formulae for current ratings and losses.