Mastering SWA Cable Sizing
The Complete Guide to BS 7671 Correction Factors and SWA sizing.
BS 7671 Requirements for Electrical Installations is published by the Institute of Engineering and Technology (IET) London, in agreement with the British Standards Institute (BSI).
If you find any errors within BS 7671 18th Edition then you can contact Committee Manager, The IET, Six Hills Way, Stevenage, SG1 2AY.
Stop cross-referencing tables— get instant, accurate results in one place → BS 7671 Software
			The Complete Guide to BS 7671 Correction Factors and SWA sizing.
			Current carrying capacities of electric cables for different reference methods.
			Safe wiring zones (prescribed zones) for walls, ceilings and electrical outlets/accessories.
			BS 7671 Amendment 4 draft is open for public comment, if you would like to have your say then now is your chance. Deadline: 3rd November 2024.
			Download your free copy of BS 7671 2018 Amendment 3 2024 PDF + details of the changes.
			Test your electrical knowledge and familiarity of BS 7671 with these BS 7671 sample questions quiz.
			SY cables and BS 7671 – Can SY cables be used in electrical installations?
			Amendment 2 of the IET Wiring Regulations BS 7671:2018+A2:2020
			Convert Zs values from a previous version of BS 7671 to BS 7671 18th edition 230v Cmin values.
			Bathroom zones and the specification and minimum requirements of electrical equipment within a room containing a bath or shower.