The book provides step-by-step guidance on the design of electrical installations, from domestic installation final circuit design to fault level calculations for LV systems.<br><br>Amendment 3 publishes on 5 January 2015 and comes into effect on 1 July 2015. All new installations from this point must comply with Amendment 3 to BS 7671:2008.<br><br>Updated to include the new requirements in Amendment 3 to BS 7671:2008, the <i>Electrical Installation Design Guide,/I&gt; reflects important changes expected to:<br><br>• Definitions throughout the Regulations<br>• Earth fault loop impedances for all protective devices</i>