Electrical services – Health Technical Memorandum 06-02 Electrical safety guidance for low voltage systemsISBN 780113 227570Electrical servicesHealth Technical Memorandum06-02: Electrical safety guidancefor low voltage systems

DH INFORMATION READER BOXPolicyHR / nceIM & TFinancePartnership WorkingDocument Purpose Best Practice GuidanceROCR Ref:Title0Gateway Ref:7092HTM 06-02 Electrical Safety Guidance for low voltage systemsAuthorDH Estates and Facilities DivisionPublication DateOctober2006Target AudiencePCT CEs, NHS Trust CEs, Care Trust CEs, Foundation Trust CEs ,Medical Directors, Directors of Nursing, PCT PEC Chairs, NHSTrust Board Chairs, Special HA CEsCirculation ListDepartment of Health libraries, House of Commons library,Strategic Health Authority, UK Health Departments, Directors ofEstates and facilitiesDescriptionThis document covers the safe systems of work and safetyprocedures for operation and management of low voltage (up to1,000v a.c.) electrical installations in healthcare premises. It issupported by safety control documents and a concise safetyhandbook for issue to all competent persons (LV) engaged on theelectrical systems.Cross RefHTM 06-01 and HTM 06-030HTM 20200n/a0Superseded DocsAction RequiredTimingn/aContact DetailsChris Holme, Principal EngineerDepartment of HealthFinance and Investment DirectorateEstates and Facilities DivisionQuarry HouseLeedsLS2 [email protected] Recipient's Use

Electrical servicesHealth Technical Memorandum06-02: Electrical safety guidance for lowvoltage systemsLondon: The Stationery Office

Electrical services – HTM 06-02 Electrical safety guidance for low voltage systemsPublished by TSO (The Stationery Office) and available, Telephone, Fax & E-mailTSOPO Box 29, Norwich NR3 1GNTelephone orders/General enquiries 0870 600 5522Fax orders 0870 600 5533E-mail [email protected] 0870 240 3701TSO Shops123 Kingsway, London WC2B 6PQ020 7242 6393 Fax 020 7242 639468–69 Bull Street, Birmingham B4 6AD0121 236 9696 Fax 0121 236 96999–21 Princess Street, Manchester M60 8AS0161 834 7201 Fax 0161 833 063416 Arthur Street, Belfast BT1 4GD028 9023 8451 Fax 028 9023 540118–19 High Street, Cardiff CF10 1PT029 2039 5548 Fax 029 2038 434771 Lothian Road, Edinburgh EH3 9AZ0870 606 5566 Fax 0870 606 5588TSO Accredited Agents(see Yellow Pages)and through good booksellers Crown copyright 2006Published with the permission of the Estates andFacilities Division of the Department of Health,on behalf of the Controller of Her Majesty’s Stationery Office.This document/publication is not covered by the HMSOClick-Use Licences for core or added-value material.If you wish to re-use this material, please send your applicationto:Copyright applicationsThe Copyright UnitOPSISt Clements House2–16 ColegateNorwich NR3 1BQISBN 0-11-322757-4978-0-11-322757-0First published 2006Printed in the United Kingdom for The Stationery OfficeiiThe paper used in the printing of this document (Revive Silk)is 75% made from 100% de-inked post-consumer waste, theremaining 25% being mill broke and virgin fibres. Recycledpapers used in its production are a combination of TotallyChlorine Free (TCF) and Elemental Chlorine Free (ECF). Itis recyclable and biodegradable and is an NAPM and Eugropaapproved recycled grade.

PrefaceAbout Health Technical MemorandaEngineering Health Technical Memoranda (HTMs)give comprehensive advice and guidance on the design,installation and operation of specialised building andengineering technology used in the delivery of healthcare.The focus of HTM guidance remains on healthcarespecific elements of standards, policies and up-to-dateestablished best practice. They are applicable to new andexisting sites, and are for use at various stages during thewhole building lifecycle:main source of specific healthcare-related guidance forestates and facilities professionals.The core suite of nine subject areas provides access toguidance which: is more streamlined and accessible; encapsulates the latest standards and best practice inhealthcare engineering; provides a structured reference for healthcareengineering.Figure 1 Healthcare building life-cycleCONCEPTDISPOSALRE-USEDESIGN & NHealthcare providers have a duty of care to ensure thatappropriate engineering governance arrangements are inplace and are managed effectively. The EngineeringHealth Technical Memorandum series provides bestpractice engineering standards and policy to enablemanagement of this duty of care.It is not the intention within this suite of documents tounnecessarily repeat international or European standards,industry standards or UK Government legislation. Whereappropriate, these will be referenced.Healthcare-specific technical engineering guidance is avital tool in the safe and efficient operation of healthcarefacilities. Health Technical Memorandum guidance is theSPECIFICATIONSTECHNICAL & OUTPUTPROCUREMENTCONSTRUCTIONStructure of the Health TechnicalMemorandum suiteThe series of engineering-specific guidance contains asuite of nine core subjects:Health Technical Memorandum 00 Policies and principles (applicable to all HealthTechnical Memoranda in this series)Health Technical Memorandum 01DecontaminationHealth Technical Memorandum 02Medical gasesiii

Electrical services – HTM 06-02 Electrical safety guidance for low voltage systemsHealth Technical Memorandum 03Heating and ventilation systems Health Technical Memorandum 04Water systemsIn a similar way Health Technical Memorandum 07-02will simply represent:Environment and Sustainability – EnCO2de.Health Technical Memorandum 05Fire safetyAll Health Technical Memoranda are supported by theinitial document Health Technical Memorandum 00which embraces the management and operational policiesfrom previous documents and explores risk managementissues.Health Technical Memorandum 06Electrical servicesHealth Technical Memorandum 07Environment and sustainabilityHealth Technical Memorandum 08Specialist servicesSome subject areas may be further developed into topicsshown as -01, -02 etc and further referenced into Parts A,B etc.Example: Health Technical Memorandum 06-02 Part Awill represent:FIC DOCUMENTSHTM 08HTM 01SpecialistServicesIF ICDOHTM 05CivMENFireSafetyTSPolicies andPrinciplesSTRMedicalGasesCUMENTSHTM 00IONAL&DUHTM 02NEUROPEAY S TA N DSTDARDOINElectricalServicesSHTM 03SHeating &VentilationSystemsICINTERNATHTM 06RD& EUROPEANALNSTIOTNAINTERCH E A LT H S P EEnvironment &SustainabilityT R Y S TA N D ARDSDAANHTM 07SDUIFINDecontaminationECLDH Estates and Facilities Division wishes to acknowledgethe contribution made by professional bodies,engineering consultants, healthcare specialists andNHS staff who have contributed to the review.HTM 04SPAHESPECIHTSome variation in style and structure is reflected by thetopic and approach of the different review workinggroups.ANDARDSFigure 2 Engineering guidanceUElectrical Services – Electrical safety guidancefor low voltage systemsWaterSystemsHETALH

Executive summaryStatusStructureHealth Technical Memorandum 06-02 replaces andsupersedes all previous versions of Health TechnicalMemorandum 2020 – ‘Safety code for low voltagesystems’.Health Technical Memorandum 06-02 consists of thismain guidance document and a “Safety guidancehandbook” (published separately).GeneralThis Health Technical Memorandum gives operationalguidance on electrical safety requirements for low voltagesystems in healthcare premises.Aim of this guidanceGuidance is intended to assist in meeting therequirements of the Electricity at Work Regulations1989, which detail the precautions to be taken againstrisk of death or personal injury from electricity in workactivities.This main guidance document provides information andstatutory guidance for those responsible for meeting therequirements of the Electricity at Work Regulations1989.The management policy section outlines the overallresponsibility of managers of healthcare premises anddetails their legal and mandatory obligations in setting upand operating reliable low voltage electrical safetyprocedures.The “Safety guidance handbook” should be issued to allstaff with responsibilities for electrical safety. The bookletis an A5-sized abridged version of this document.Who should read this guidance?This document will be of interest and practical help tothose involved in the design, operation and maintenanceof electrical systems and equipment.

Electrical services – HTM 06-02 Electrical safety guidance for low voltage systemsAcknowledgementsChris HolmeDepartment of HealthGeoff YeomansRoyal Free Hospital, LondonIan Hawthorn Sandwell General Hospital, West BromwichNigel PorterWelsh Health EstatesOwen CusackNorthumbria Healthcare NHS TrustPeter DesForgesDevelop, Cramlington, NorthumberlandSteve WilsonFaber Maunsell, Londonvi

ContentsPrefaceExecutive summaryAcknowledgementsChapter 1Chapter 2Chapter 3Chapter 4Scope GeneralPurposeProceduresStandardsDutiesSecurity of informationApplication of this safety guidanceOther safety guidance, related documents and proceduresInformation and instructionIssue of this safety guidance (LV)Variation of safety guidance (LV)Issue of the safety guidance handbookObjectionsDefinition of “should”Definition of “reasonably practicable”Associated regulations and documentsDefinitions PersonnelDesignated PersonDuty HolderManagementAuthorising Engineer (LV)Authorised Person (LV)Competent Person (LV)Accompanying Safety Person (LV)Safety documentsCertificate of authorisation for live workingLimitation-of-accessPermit-to-work (electrical LV)Safety signsCaution signDanger signSwitchroom signVoltage rangeGeneral definitionsManagement policy Appointment, roles and duties of personnel GeneralRoles and duties of the Designated PersonRole and duties of the Authorising Engineer (LV)1479vii

Electrical services – HTM 06-02 Electrical safety guidance for low voltage systemsChapter 5Chapter 6Chapter 7Chapter 8viiiRoles and duties of the Authorised Person (LV)Role and duties of the Competent Person (LV)Role and duties of the Accompanying Safety Person (LV)Appointment of an Authorising Engineer (LV)Appointment of an Authorised Person (LV)Appointment of a Competent Person (LV)Contractor’s Competent PersonsSuspension or cancellation of appointment of an Authorised Person (LV)Demarcation of responsibilities between the management and others 15GeneralWhere the management has control of the danger for part of another organisation’s systemor installationWhere the management does not have control of the danger for a system or installationWhere contractors are to undertake installation work on an existing system or installationfor which the management has control of the dangerFor new work before the system or installation is accepted from the contractorGeneral precautions 17Admittance to switchroomsSecurity of electrical equipmentAvailability of electrical suppliesSafety key boxesDangerous occurrencesOperational restrictionsLocation of underground cablesSwitching methodsSafety switchingFault-switchingEmergency switchingFire protection equipmentAutomatic controlPortable extinguishersAccess to, and work in, underground chambers, vessels and confined spacesProtective equipmentTest equipmentCable identificationCircuit identificationSafety precautions and procedures for work on low voltage systems made dead 22GeneralIsolationWork on low voltage electrical equipment and conductors made deadWorking on cablesIdentification and spiking of LV cablesAdditional precautions for work on generating plantUninterruptible power supply systemsPermit-to-workIssue of a permit to a contractorSafety programmes and isolation and earthing diagramsSummarySafety precautions and procedures for live working and testing low voltage equipment 28Work on or near live equipmentSafety precautions and procedures for work on live low voltage electrical equipment andconductorsPrecautions for working on battery installations

Contents Chapter 9Chapter 10Chapter 11Chapter 12Appendix 1Appendix 2Work on a low voltage system associated with a high voltage system Operating records GeneralLV logbookOperational procedure manualOperating and maintenance manualsMaintenance recordsIsolation and earthing diagramImplementing the isolation and earthing diagramCompletion of the work or testSafety programmesGeneralContents of safety programmesImplementing safety programmesCompletion of safety programmesPermits-to-workGeneralIssue and acceptance of permits-to-workCancellation of the permit-to-workLimitation-of-accessGeneralIssue and acceptance of limitations-of-accessCancellation of a limitation-of-accessCertificate of authorisation for live workingGeneralProcedure for issue of a certificate of authorisation for live workingProcedure for cancelling a certificate of authorisation for live workingDisplay of permanent posters and safety signs Display of postersDesign specificationDisplay of permanent safety signsDisplay of temporary safety signsFirst-aid Treatment for electric shock – free from contactCardiac resuscitationChest compressionsControl of bleedingMinor cuts, scratches and grazesSevere bleedingObjects in woundsBurns and scaldsSevere burnsMinor burnsClothing on fireFirst-aid appliancesAssociated regulations and documents StatutoryGuidanceStandardsProtective and test equipment GeneralProtective equipmentProtective equipment covered by a British Standard313240424647ix

Electrical services – HTM 06-02 Electrical safety guidance for low voltage systemsAppendix 3Appendix 4Appendix 5 Protective equipment not covered by a British StandardVoltage test indicatorsCable locating devicesEarthing equipmentSwitchroom earthingRecommendations for the inspection, test and recalibration of protective, test equipmentFire extinguisher installation and eq