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Work item:
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K.66
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Subject/title:
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Protection of customer premises from overvoltages
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Status:
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Approved on 2019-11-13 [Issued from previous study period]
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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Rev.
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Equivalent number:
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-
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Timing:
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-
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Liaison:
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-
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Supporting members:
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-
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Summary:
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Recommendation ITU-T K.66:
o provides recommendations for bonding and earthing of telecommunication equipment in residential and commercial customer premises;
o refers to Recommendation ITU-T K.21 (2008) for equipment resistibility requirements;
o recommends earthing and bonding requirements to coordinate with the resistibility requirements of Recommendation ITU-T K.21 (2008) and the safety requirements of IEC 60950-1 and IEC 62368;
o recommends the installation practices for bonding of all services and the installation of surge protective devices (SPDs);
o illustrates problems associated with earthing and bonding and provides solutions for these earthing and bonding problems. These include:
1) methods to improve the earthing and bonding;
2) methods of providing additional protection external to the equipment;
3) special resistibility and safety requirements;
o recommends responsibilities for protection at customer premises;
o refers to IEC 62305-3 for protection against direct lightning.
This revision of ITU-T K.66 includes an update of the references and a revision of clause 6.3 to include more information on preventing equipment damage. Appendix IV, containing information on special resistibility requirements has been deleted; the reader is directed to Recommendation ITU T K.44 (2008).
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Comment:
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(ex Q5/5 Study period 2013-2016)
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Reference(s):
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Historic references:
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Contact(s):
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| ITU-T A.5 justification(s): |
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First registration in the WP:
2012-01-13 17:03:37
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Last update:
2019-11-21 10:05:41
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