Chapter 8 Safety Standards for Electrical Installations ...

1 JSP 482 MOD Explosives Regulations May 2016 Chap 8 Page 1 Chapter 8 Safety Standards FOR Electrical Installations AND EQUIPMENT IN EXPLOSIVES FACILITIES CONTENTS Paragraph 1. INTRODUCTION Scope of Regulations New Buildings and Refurbishments, Responsibilities and Approvals Project Teams (PTs) Duty of Care Maintenance Staff Duty of Care Non Compliance of Infrastructure Maintenance Periodicity Approvals of Electrical Equipment Retrospective Action Small Quantities of Explosives For Research and Development 2. Electrical CATEGORIES AND Standards OF EXPLOSIVES BUILDINGS, AREAS, Installations AND EQUIPMENT Introduction Signage Electrical Categories A & B, and DSEAR Area Classification of Category A & B Facilities, and Facilities with DSEAR Zones Category A Zone Determination Category A Standard of Installations /Equipment Category B Zone Determination Category B - Standard of installation /Equipment Special Dust Cases Category C Electrical Installations Category D Electrical Installations Aircraft Maintenance Facilities for Weapon Support Purposes Electrical Systems on Vehicles and Mechanical Handling Equipment 3.

2 ELECTRICITY DISTRIBUTION EXTERNAL TO ESA protection from Power Supply Authority Overhead Power Lines 4. ELECTRICITY DISTRIBUTION WITHIN THE ESA Electrical Distribution Within Explosives Areas Lighting Columns Crossing of Roads and Railways Plans of Underground Cable Runs Siting of Distribution & Supply Equipment 5. Electrical SUPPLIES AND WIRING SYSTEMS IN EXPLOSIVES BUILDINGS Supply to Buildings Containing Explosives Earthing Arrangements JSP 482 MOD Explosives Regulations May 2016 Chap 8 Page 2 Main Switches Final Circuits protection from External Transients Wiring Systems Cables Used in Conduit and Trunking Systems Conduit Trunking and Cable Tray Systems Mineral Insulated Metal Covered Cables Armoured and Metal Sheathed Cables Thermosetting Insulating Cables Low Fume Hazard (LFH) Communications and Instrumentation Cables Socket Outlets Residual Current Devices (RCD) 6.

3 Electrical EQUIPMENT GENERAL REQUIREMENTS AND EMC Introduction Design and Construction of Electrical Installations and Equipment Material Restrictions Temperature Considerations Degrees of protection Provided by an Enclosure (BS EN 60529) Electromagnetic Compatibility (EMC) and HERO (Hazards of Electromagnetic Radiation to Ordnance) 7. FIXED Electrical EQUIPMENT Requirement Definition of Fixed Electrical Equipment Luminaires (Light Fittings) Heating/Air Conditioning and Humidity Controlling Appliances Equipment used for heating Explosives Fixed Communication Equipment, Fire and Security Alarm Systems Closed Circuit Television and Thermal Camera Systems Heat Sealing Machines 8. PORTABLE Electrical EQUIPMENT Requirement Definition of Portable Electrical Equipment Mains Powered Portable Equipment Battery Operated Equipment and Equipment containing Batteries Digital Cameras Electric Soldering Irons Medical Aids (Internal and Externally Worn Types) Defibrillators X-Ray Equipment Electronic Environmental Monitoring/Data Logging Equipment Equipment for Testing Electro-Explosive Devices (EEDs) 9.

4 OTHER Electrical EQUIPMENT Electrical Equipment Installed on Piers, Jetties and other licensed Potential Explosion Sites (PES) Computers and Computerised Equipment Electronic Asset Tracking Systems 10. ALL UP ROUND (AUR) AUTOMATIC TEST SYSTEMS (ATS) JSP 482 MOD Explosives Regulations May 2016 Chap 8 Page 3 11. ELECTROSTATIC DISCHARGE (ESD) protection Introduction Determination of EED Ignition Energy Electrostatic (Conductive and Anti-Static) Protected Area (EPA) Control Measures Grounding/Equipotential Bonding Systems Electrostatic Flooring Workbenches Personnel Grounding HAPTMs Conditioning of Materials and PPE Relative Humidity Display Packaging Special to Type Equipment ESD Training and Awareness Verification of EPA Control Measures 12.

5 ANTISTATIC REGIME Requirements Use of Wrist and Leg Straps with Antistatic Regimes Checking of Antistatic Equipment Prior to Use Test Methods for Antistatic Equipment 13. CONDUCTIVE REGIME Requirements 14. MIXED STATIC PROTECTED AREAS Requirements 15. TEST METHODS FOR FOOTWEAR AND CONVEYOR BELTS For Conducting/Antistatic Footwear For Conveyor Belts 16. PERSONNEL Safety Residual Current Devices Mains Powered Electrical Equipment Safety 17. EXPLOSIVES PROCESSING DURING FIELD DEPLOYMENTS, OUT OF AREA AND EOD OPERATIONS 18. COMMISSIONING, INSPECTION AND TESTING OF Electrical Installations AND EQUIPMENT Commissioning, Inspection and Testing Safety Precautions during Commissioning, Inspection and Testing Electrical Installations - Frequency of Inspection and Testing Flexible Cable Inspection and Test 19.

6 lightning protection JSP 482 MOD Explosives Regulations May 2016 Chap 8 Page 4 Introduction Exclusions Internal lightning protection installation & Separation Distances Control of Hazard to Personnel Making Safe Explosive Facilities In Event of lightning Activity Warning 20. SURGE protection OF Electrical AND ELECTRONIC SYSTEMS IN EXPLOSIVES FACILITIES Details Exclusions Tables Table 1 Classification for Explosives Gas/Vapour Risks Table 2 Types of protection for Cat A Installations Table 3 Classification for Explosives Dust Risks Table 4 Types of protection for Cat B Installations Table 5 Safe Distances for Low Voltage and High Voltage Switchgear Table 6 Maximum Surface Temperature Table 7 Degrees of protection Provided by an Enclosure (IP Code to BS EN 60529) Figures Fig 1 Electrical Category Selection Algorithm Fig 2 Equipotential Bonding of Munitions Annex A List of Related Regulations, Standards and Codes of Practice B Requirements for Automatic Test Systems (ATS) for All Up Round (AUR)

7 Testing and Section Testing C Requirements for Enclosures for Category C Electrical Installations and Equipment D lightning protection Systems E Requirements for Enclosures for Category D Electrical Installations and Equipment F Chemical Weapons Convention Inspection of UK MOD Explosives Areas G Example Electrical Category Signage for Explosives Buildings H MOD FORM 2256 Electrical Equipment Approval Request Form JSP 482 MOD Explosives Regulations May 2016 Chap 8 Page 5 1. INTRODUCTION Scope of Regulations This Chapter prescribes the regulatory requirements and Standards for Electrical Installations , lightning protection , electrostatic protection and Electrical /electronic equipment in above ground and underground sites containing or likely to contain Military Explosives.

8 These sites cover storage, processing and handling buildings and facilities, including airfields. These regulations do not apply to administrative buildings, workshops or other buildings including non-occupied buildings that do not contain Military Explosives but are nevertheless within an explosives area. The Electrical installation and equipment used in such buildings are to comply with statutory requirements and specifications to ensure that they do not endanger explosives facilities. These regulations are to be read in conjunction with relevant National Regulations, International Standards , British and European Standards and Codes of Practice which are listed at Annex A. This is not an exhaustive list and additional regulations and Standards may be required to prove compliance with these regulations and the Health & Safety at Work Act.

9 Attention is drawn specifically to: The Requirements for Electrical Installations BS 7671 (the Institution of Engineering and Technology (IET) Wiring Regulations)), Electricity at Work Regulations (EWR), the Provision and Use of Work Equipment Regulations (PUWER) and the Dangerous Substances and Explosive Atmospheres Regulations (DSEAR) and the Management of Health and Safety at Work Regulations 1999. MoD Sponsors of Facilities Management (FM) Contractors are reminded of their responsibility to pass this document, along with all associated documents to FM Contractors. The precautions contained within this Chapter are applicable to all personnel who handle and process Ordnance, Munitions and Explosives (OME). If these conditions are not observed, personnel may be at risk from accidental explosion.

10 New Buildings and Refurbishments, Responsibilities and Approvals Duty Holders who have responsibility for new builds, refurbishment or modification programmes, shall comply with the requirements of JSP482 Chapter 5 (Planning and Siting of Explosives Facilities and Alterations to Existing Facilities). A key requirement of that Chapter is that the required Electrical category1 for the explosives licensed building shall be determined in accordance with the flow chart in Fig 1 of this Chapter . This shall be notified to the relevant Inspector of Explosives (IE) and the Electrical installation , including equipment installed within the facility shall comply with the requirements of this Chapter with regards to its Electrical category.