This Guide provides clarity on the technical and practical requirements of BS 7671:2018 The IET Wiring Regulations 18th Edition and BS 7909:2011 Code of Practice for temporary electrical systems for entertainment and related purposes that are relevant to all those working with temporary power systems.

• Section 1: Introduction
• Section 2: The electrical supply
• Section 3: Earthing and bonding
• Section 4: Protection
• Section 5: Isolation and switching
• Section 6: Power quality and energy efficiency
• Section 7: Special locations and emergency requirements
• Section 8: Inspection and testing
• Section 9: Example temporary systems
• Appendix A: Maximum permissible measured earth fault loop impedance
• Appendix B: Current-carrying capacities and voltage drop for common flexible cables
• Appendix C: Resistance of copper and aluminium conductors
• Appendix D: Circuit-breaker operating curves 101
• Appendix E: Operating times of RCDs to BS EN 61008 & BS EN 61009 (including DC performance characteristics)
• Appendix F: BS 7909 model forms
• Appendix G: Schedule of Test Results