GB 6830-1986The tolerable limits of danger ontelecommunication lines from power lines (English PDF)

3 Permissible values of the dangerous longitudinal electromotive force caused by magnetic induction in open-wire telecommunication lines

4 Permissible values of the dangerous longitudinal electromotive force caused by magnetic induction in telecommunication cable lines

5 Protective measures

Foreword

This document was issued on 2 September 1986 by the State Bureau of Standards, and has been in force since 1 October 1987.

It is the first edition of this standard.

Classification: ICS 33.040.50, CCS M04.

About this edition

GB 6830-1986 is the first edition of this standard. It was issued on 2 September 1986 and has been in force since 1 October 1987.

There is no earlier edition to compare it with, so a specification that has to refer to this subject can only cite GB 6830-1986 itself.

The interval between issue and effect is the transition period. It exists so that producers, laboratories and buyers can requalify products, revise procedures and use up documentation before the new text becomes the one that applies. The date on this page is the official one from the record of the Standardization Administration.

Classification and status

GB 6830-1986 is classified under ICS 33.040.50, in the field of telecommunications. ICS is the International Classification for Standards, the same scheme used by ISO and by the national bodies of most countries, which is what allows a Chinese standard to be placed beside its foreign counterparts on subject rather than on number.

Its Chinese Standard Classification code is CCS M04. CCS is the domestic scheme, a letter for the sector and two digits for the subject within it, and it is the code by which the standard is filed and searched in China.

The GB prefix without a suffix marks a mandatory national standard: compliance is required by law for the products or activities within its scope, and a product that does not meet it may not lawfully be placed on the Chinese market.