Electric cables. Calculation of the current rating Sections on operating conditions. Cables crossing external heat sources

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

29-06-2007

Publisher

British Standards Institution

INTRODUCTION
1 Scope
2 Normative references
3 Symbols
4 Description of method
  4.1 General description
  4.2 Single source crossing
  4.3 Several crossings
  4.4 Rating of two crossing cables
Annex A (informative) Example calculation
Annex B (informative) Temperature rise calculation
        at any point along the route

Provides a method for calculating the continuous current rating factor for cables of all voltages where crossings of external heat sources are involved.

Describes a method for calculating the continuous current rating factor for cables of all voltages where crossings of external heat sources are involved. The method is applicable to any type of cable. The method assumes that the entire region surrounding a cable, or cables, has uniform thermal characteristics and that the principle of superposition applies. The principle of superposition does not strictly apply to touching cables and hence the calculation method set out in this standard will produce an optimistic result if applied to touching cables

Committee	GEL/20/16
DevelopmentNote	Supersedes 05/30131315 DC. (06/2007)
DocumentType	Standard
Pages	18
PublisherName	British Standards Institution
Status	Current
Supersedes	05/30131315 DC : DRAFT JUN 2005

Standards	Relationship
IEC 60287-3-3:2007	Identical

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BS IEC 60287-3-3:2007

Electric cables. Calculation of the current rating Sections on operating conditions. Cables crossing external heat sources

Table of Contents

Abstract

Scope

General Product Information

International Equivalents

Category

Subcategory