Publisher Description

Electrical Installation Design Guide: Calculations for Electricians and Designers provides step-by-step guidance on the design of electrical installations. The guide will be useful for apprentices and trainees carrying out the calculations necessary for a basic installation and has been fully updated to BS 7671:2018+A2:2022.BS 7671:2018+A2:2022 incorporates changes from the first amendment, published in 2020, regarding Electric Vehicle Charging Installations to provide greater guidance on embracing changing technology within this sector. Additional changes within the second amendment include protection against thermal effects and fire caused by electrical equipment, protection against voltage disturbances and electromagnetic disturbances, and a new section on prosumer's low-voltage electrical installations covering energy efficiency measures, the interface with the smart grid, the management of electricity consumption, the management of renewable sources of electricity, and energy storage.

Table of Contents

• Section 1: Design sequence
• Section 2: Simple installations and final circuits
• Section 3: Maximum demand and diversity
• Section 4: Selection of cables for current-carrying capacity
• Section 5: Voltage drop
• Section 6: Calculation of fault current
• Section 7: Shock protection
• Section 8: Protection against fault current
• Section 9: Calculations associated with testing
• Section 10: Impedance of copper and aluminium conductors
• Section 11: Harmonics
• Section 12: Protection against voltage disturbances
• Section 13: Busbar trunking
• Section 14: Prosumer's electrical installations (PEIs)
• Appendix A: Symbols
• Appendix B: Standard final circuits
• Appendix C: Avoidance of unintentional operation of circuit-breakers
• Appendix D: Further cable calculations
• Appendix E: Symbols from PD CLC/TR 50480:2011
• Appendix F: Equipment data
• Index

Details