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. Updated to include the new requirements in Amendment No. 3 to BS 7671:2008, the Electrical Installation Design Guide reflects important changes expected to: Definitions throughout the Regulations Earth fault loop impedances for all protective devices Amendment No. 3 publishes on 5 January 2015 and comes into effect on 1 July 2015. All new installations from this point must comply with Amendment No. 3 to BS 7671:2008.
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