CLC/TC 215/WG 02 - Electrical safety

This document specifies requirements and provides recommendations for the design and installation of connections (bonds) between various electrically conductive elements in buildings and other structures, during their construction or refurbishment, in which information or telecommunications technology equipment is intended to be installed in order to: a) minimise the d.c. and a.c. potential differences in order to reduce the risk of malfunction of that equipment and interconnecting cabling due to electromagnetic disturbance; b) provide the telecommunications installation with a reliable signal reference – which may improve immunity from electromagnetic interference (EMI). The requirements of this European Standard are applicable to the buildings and other structures within premises addressed by EN 50174-2 (e.g. residential, office, industrial and data centres) but information given in this European Standard may be of assistance for other types of buildings and structures. NOTE Telecommunications centres (operator buildings) are addressed by ETSI/EN 300 253. This European Standard does not apply to power supply distribution of voltages over AC 1 000 V. Electromagnetic compatibility (EMC) requirements and safety requirements for power supply installation are outside the scope of this European Standard and are covered by other standards and regulations. However, information given in this European Standard may be of assistance in meeting the requirements of these standards and regulations.

This document a) addresses the support of safety extra low voltage (SELV) and limited power source (LPS) applications that provide remote power over: • 4-pair balanced cabling in accordance with the reference implementations of EN 50173 series using currents per conductor of up to 500 mA; • 1-pair balanced cabling using currents per conductor of up to 2 000 mA; and targets the support of applications that provide remote power over balanced cabling to terminal equipment, b) covers the transmission and electrical parameters needed to support remote power over balanced cabling, c) covers various installation scenarios and how these may impact the capability of balanced cabling to support remote powering, d) specifies design and configuration of cabling as specified in EN 50173-1. NOTE SELV requirements specify a maximum voltage of 60 V DC and LPS is understood in the applications referenced to be up to 100 W supplied within cabling. This document includes a mathematical model to predict the behaviour of different bundle sizes, various cabling constructions, and installation conditions for different current capacities.

This document specifies requirements for the following aspects of information technology cabling: a) installation specification, quality assurance documentation and procedures; b) documentation and administration; c) operation and maintenance. This document is applicable to all types of information technology cabling including but not limited to generic cabling systems designed in accordance with the EN 50173 series. Examples of other types of information technology cabling covered by this document are: — Cable TV; — CCTV; — alarm and access control; — building control. NOTE Local regulations can also apply to the above mentioned cabling types. Safety (electrical safety and protection, optical power, fire, etc.) and electromagnetic compatibility (EMC) requirements are outside the scope of this document and are covered by other standards and regulations. However, information given in this document might be of assistance in meeting these standards and regulations.

This document specifies requirements and provides recommendations for the following aspects of information technology cabling: a) planning; b) installation practice. This document is applicable to all types of information technology cabling outside buildings including generic cabling systems designed in accordance with EN 50173 series. The requirements and recommendations of this document can be applied to cabling that is defined as part of the building. The requirements and recommendations of Clauses 5, 6 and 7 of this document are subject to any site-specific requirements and recommendations of Clause 8. The planning of the pathway systems, spaces and structures within the core and access network cabling as described in Figure 2 that are owned by access providers is excluded except for requirements and recommendations that provide basic safety, function and environmental objectives for mechanical, ingress and climatic characteristics (i.e. excluding pathway dimensions, distribution of spaces and similar constraints based on specific transmission methods). The installation practices applicable to all cabling installation methods are included by the provision of the necessary planning requirements and recommendations associated with each one with the exception of information technology cabling installed: – around or within aerial power supply or associated earth conductors; – on infrastructures carrying power supplies in excess of AC/DC 25 kV. This document: 1) details the considerations for satisfactory installation and operation of information technology cabling; 2) excludes specific requirements applicable to other cabling systems (e.g. power supply cabling); however, it takes account of the effects other cabling systems may have on the installation of information technology cabling (and vice versa) and gives general advice; 3) excludes those aspects of installation associated with the transmission of signals in free space between transmitters, receivers or their associated antenna systems (e.g. wireless, radio, microwave or satellite). This document is applicable to certain hazardous environments. It does not exclude additional requirements which are applicable in particular circumstances, defined by e.g. electricity supply and electrified railways. The requirements within this document cover any additional requirements for the information technology cables installed in hazardous or stressful environments e.g. electricity supply and electric railway locations (see Clause 8). Safety (electrical safety and protection, optical power, fire protection, etc.) and electromagnetic compatibility (EMC) requirements are outside the scope of this document and are covered by other standards and regulations. However, information given in this document can be of assistance in meeting these standards and regulations. Examples of areas covered by this document are shown in Figure 2.

This document specifies requirements for the following aspects of information technology cabling: a) planning; b) installation practice. This document is applicable to all types of information technology cabling inside buildings (and can be applied to cabling that is defined as part of the building) including generic cabling systems designed in accordance with the EN 50173 series. NOTE Planning and installation of certain types of application-specific cabling can be supplemented by other standards e.g. EN 63044–6 for Home Building Electronics System (HBES) and Building Automation and Control Systems (BACS). The requirements of Clauses 5, 6 and 7 of this document are premises-independent unless amended by the requirements of premises-specific clauses. This document: 1) contains requirements and recommendations for satisfactory installation and operation of information technology cabling; 2) describes the methodology for the assessment of spaces, pathways (and pathway systems) and cabling (either installed or planned) in support of remote powering objectives; 3) excludes specific requirements applicable to other cabling systems (e.g. power supply cabling); however, it takes account of the effects other cabling systems have on the installation of information technology cabling (and vice versa) and gives general advice; 4) excludes those aspects of installation associated with the transmission of signals in free space between transmitters, receivers or their associated antenna systems. This document is applicable to certain hazardous environments. It does not exclude additional requirements which are applicable in particular circumstances, defined by e.g. electricity supply and electrified railways. Safety (electrical safety and protection, optical power, fire protection, etc.) and electromagnetic compatibility (EMC) requirements are outside the scope of this document and are covered by other standards and regulations. However, information given in this document can be of assistance in meeting these standards and regulations.