IEC 60794-1-403:2021 pdf download

IEC 60794-1-403:2021 pdf download.Optical fibre cables – Part 1-403: Generic specification – Basic optical cable test procedures – Electrical test methods
1 Scope
This part of IEC 60794 specifies a method of verifying that cable metallic elements are electrically continuous throughout the cable. Electrical continuity is important for bonding and grounding, toning for location, and other related system issues, and may represent a “goodness of manufacture” criterion. Typically, the test is one of continuity and carries no resistance or conductivity requirement. The metallic elements can be tested individually or can be tested as a total group. Since this latter criterion is frequently the case, all elements are measured as a group unless specified otherwise.
NOTE It is possible detail specifications allow such elements as strength members to be non-continuous throughout the cable. This is a special case, and attention is directed to the detail specification.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60794-1-1, Optical fibre cables – Part 1-1: Generic specification – General
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60794-1-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Sample
The sample is an entire cable to be measured. As this test is non-destructive, the cable may be shipped afterward.
5 Apparatus
The apparatus may be any device capable of assuring electrical continuity. Common examples include
– ohm meter, and
– low-voltage circuit test light.
6 Procedure
Perform the following steps, unless otherwise specified. 1) Open each end of the cable sufficiently to connect the test apparatus to the metallic member(s), singularly or as a group, as specified. When testing as a group, the metallic elements shall be connected in a loop. This may require stripping the sheath or other covering for a very short distance. 2) Connect the test device to both ends to complete the test circuit. Record the presence or absence of conductivity or record the resistance of the cable element(s), if specified.
7 Requirements
The metallic elements shall be continuous. The requirement will apply to the elements as a group or singularly, as specified. If specified, the measured resistance shall be less than the maximum value at the indicated temperature.
8 Details to be specified
The following deviations from the standard test can be included and shall be performed if specified by the detail specification: a) metallic elements to be measured individually or in type groups; b) that element resistance is to be measured, and the maximum resistance value allowed; or c) any other special criteria to be applied.