| Bonding configurations and earthing at remote electronic sites |
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Bonding configurations, earthing, and the type of power distribution for equipment located at remote electronic sites are proposed, which are intended to promote harmony of installation and equipment configurations while providing for personnel safety and electromagnetic compatibility.
With the popularization of 5G mobile communication, the number of outdoor communication equipment is increasing rapidly. In order to reduce costs, outdoor electronic equipment cabinets (EECs) substitute outdoor shelters for telecommunication systems. Telecommunication equipment (baseband units (BBUs)), power supply equipment, battery, temperature control equipment, optical transmission equipment and other ancillary equipment can be installed in these outdoor cabinets.
Recommendation ITU-T K.35 (2018) gives the definition of electronic equipment cabinet (EEC), earthing, bonding, but it is not detailed. For example, the surge protective device (SPD) configuration in the outdoor cabinet, the setting of the earthing terminal (main earthing terminal, optical cable dedicated earthing terminal), and the bonding of the equipment in the cabinet are not specified in detail. It is difficult for users of standards to obtain effective specifications and guidelines.
China industrial standard YD/T 1537-2015, Outdoor cabinets for telecommunication system, had defined EEC as "integrated access outdoor cabinet" and "base station outdoor cabinet" depending on the application situation. This standard provides more information on lightning protection and earthing.
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ITU-T Supplement
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Title
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Status
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Summary
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Table of contents
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Download
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K Suppl. 3 (10/2015)
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ITU-T K.20, K.21, K.45, K.82 – Additional criteria to protect telecommunication cabling during a power cross event
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In force
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here
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here
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here
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K Suppl. 8 (11/2017)
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Resistibility analysis of 5G systems
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In force
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here
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here
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here
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K Suppl. 9 (05/2019)
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5G technology and human exposure to radiofrequency electromagnetic fields
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In force
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here
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here
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here
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K Suppl. 10 (11/2017)
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Analysis of electromagnetic compatibility aspects and definition of requirements for 5G mobile systems
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In force
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here
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here
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here
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K Suppl. 13 (12/2021)
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Radiofrequency electromagnetic field (RF-EMF) exposure levels from mobile and portable devices during different conditions of use
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In force
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here
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here
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here
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K Suppl. 14 (09/2019)
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The impact of RF-EMF exposure limits stricter than the ICNIRP or IEEE guidelines on 4G and 5G mobile network deployment
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In force
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here
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here
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here
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K Suppl. 16 (10/2022)
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Electromagnetic field compliance assessments for 5G wireless networks
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In force
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here
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here
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here
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K Suppl. 19 (09/2019)
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Electromagnetic field (EMF) strength inside underground railway trains
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In force
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here
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here
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here
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K Suppl. 29 (07/2022)
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Electromagnetic field strength inside and outside of electric vehicles using wireless power transfer technology
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In force
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here
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here
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here
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K Suppl. 32 (06/2023)
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Case studies of radio frequency- electromagnetic field (RF-EMF) assessment
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In force
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here
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here
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here
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| Title |
Approved on |
Download |
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Mitigation measures for telecommunication installations – Chapter 10
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2006
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here
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Mitigation measures for telecommunication installations
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2004
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here
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Earthing and bonding
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2003
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here
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Guide to the use of ITU-T Publications produced by Study Group 5 aimed at achieving Electromagnetic Compatibility and Safety
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2002
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here
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Earthing of telecommunication installations
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1976
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here
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