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BS 7769-1.1:1997

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Electric cables. Calculation of the current rating. Current rating equations (100% load factor) and calculation of losses General
Available format(s)

Hardcopy , PDF

Superseded date

01-31-2007

Language(s)

English

Published date

08-15-2002

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.

Committee
GEL/20/16
DevelopmentNote
Supersedes 97/200610 DC & 99/242702 DC. (09/2002)
DocumentType
Standard
Pages
32
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

BS 7888-2:1998 LV and MV accessories for power cables with rated voltage from 0.6/1 kV (<i>U</i><sub>m</sub>=1.2 kV) up to and including 20.8/36 kV (<i>U</i><sub>m</sub>=42 kV) Methods of test
BS 7671(2008) : 2018 REQUIREMENTS FOR ELECTRICAL INSTALLATIONS - IET WIRING REGULATIONS
BS 7769-2.2:1997 Electric cables. Calculation of the current rating. Thermal resistance A method for calculating reduction factors for groups of cables in free air, protected from solar radiation
BS 7671(2008) : 2008 REQUIREMENTS FOR ELECTRICAL INSTALLATIONS - IET WIRING REGULATIONS

IEC 60028:1925 International standard of resistance for copper
IEC 60228:2004 Conductors of insulated cables
IEC 60502:1994 Extruded solid dielectric insulated power cables for rated voltages from 1 kV up to 30 kV
IEC 60889:1987 Hard-drawn aluminium wire for overhead line conductors
IEC 60183:2015 Guidance for the selection of high-voltage A.C. cable systems
IEC 60228A:1982 First supplement - Conductors of insulated cables - Guide to the dimensional limits of circular conductors

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US$237.18
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