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IS0
INTERN AT1 ON A L O RG A N I2 AT1 ON
FOR STA N DA R D IZATl ON
IS0 RECOMMENDATION
R 539
> . .-'
DIMENSIONS AND CONDUCTOR RESISTANCE
OF HEAT-RESISTING (260 OC) ELECTRICAL CABLES
WITH COPPER CONDUCTORS, FOR AIRCRAFT
1st EDITION
January 1967
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COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country thc only valid standard is thc national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 539, Dimensions and Conductor Resistance of Heat-resisting
(260°C) Electrical Cables with Copper Conductors, ,for Aircraft, was drawn up by Technical
Committee ISO/TC 20, Aircraft, the Secretariat of which is held by the British Standards Insti-
tution (BSI).
Work on this question by the Tcclinical Committee began in 1960 and led, in 1963, to the
adoption of a Draft IS0 Recommendation.
In October 1964, this Draft IS0 Recommendation (No. 770) was circulated to all the IS0
Member Bodies for enquiry. It was approved, subject to a few modifications of an editorial
nature, by the following Member Bodies :
Australia Israel Switzerland
Belgium Italy United Kingdom
Canada Japan Yugoslavia
Chile Netherlands
France Republic of
Germany South Africa
Greece Spain
Two Member Bodies opposed the approval of the Draft:
Czechoslovakia
U.S.S.R.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council,
which decided, in January 1967, to ac
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