PDF《Draft ETSI》

300 253 V2.1.11 (2015-01)

4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR

000 314: Intellectual Property Rights (IPRs);

Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards , which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR

000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This draft European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE), and is now submitted for the combined Public Enquiry and Vote phase of the ETSI standards EN Approval Procedure. The present document has been produced within the framework of the following considerations: a) ICT equipment is generally installed in telecommunication or data centres and held in racks, cabinets or other mechanical structures;

b) the existing Recommendation ITU-Ts and CENELEC standards in such matters do not ensure the required standardization at the equipment level;

c) network operators and equipment providers agreed to standardize on a bonding configuration that facilitates: - compliance with functional requirements including Electromagnetic Compatibility (EMC) aspects of emission and immunity;

- compatible building and equipment provisions;

- installation of new telecommunication or data centres as well as expansion or replacement of installations in existing telecommunication or data centres with equipment coming from different suppliers;

- a structured installation practice;

- simple maintenance rules;

- contracting on a common basis;

- cost effectiveness in development, manufacturing, installation and operation. Proposed national transposition dates Date of latest announcement of this EN (doa):

3 months after ETSI publication Date of latest publication of new National Standard or endorsement of this EN (dop/e):

6 months after doa Date of withdrawal of any conflicting National Standard (dow):

6 months after doa ETSI Draft ETSI EN

300 253 V2.1.11 (2015-01)

5 Modal verbs terminology In the present document shall , shall not , should , should not , may , may not , need , need not , will , will not , can and cannot are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). must and must not are NOT allowed in ETSI deliverables except when used in direct citation. Introduction The present document addresses earthing and bonding of ICT equipment in telecommunication or data centres in relation to safety, functional performance and EMC. Information regarding the general principles on earthing for telecommunication or data centres has been published by the ITU-T in the handbook on Earthing of telecommunication installations [i.1]. Recommendation ITU-T K.27 [i.2] deals with bonding configurations and earthing inside a telecommunication building or data centre. One bonding configuration only is selected from Recommendation ITU-T K.27 [i.2] (CBN/MESH-BN) and tailored to the present document. The author thanks the International Electrotechnical Commission (IEC) for permission to reproduce Information from its International Standard IEC 60364-1 (CENELEC HD 60364-1 [i.11]) ed. 5.0 (2005). All such extracts are copyright of IEC, Geneva, Switzerland. All rights reserved. Further information on the IEC is available from www.iec.ch. IEC has no responsibility for theplacement and context in which the extracts and contents are reproduced by the author, nor is IEC in any wayresponsible for the other content or accuracy therein. ETSI Draft ETSI EN