Rec. ITU-T K.20 (11/2019) Protection against lightning electromagnetic pulses in telecommunication centres
Summary
History
FOREWORD
Table of Contents
Introduction
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
     3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Conventions
6 Reference configuration
7 Need for protection
8 Protective measure
     8.1 General principles: lightning protection zones (LPZs)
     8.2 Earthing
     8.3 Bonding: minimum CBN
     8.4 Cabling routing
9 Additional protective measures
     9.1 General
     9.2 Shielding
          9.2.1 The structure
          9.2.2 The cabling
     9.3 Coordinated SPD system
     9.4 Isolating interfaces
Appendix I   Simulation of LEMP effects – Test set-up
Appendix II   Protection management
     II.1 New telecommunication centres
     II.2 Existing telecommunication centres
Bibliography