the-Regs : BS7671 18th Edition Online Training
BS 7671: 18th Edition Wiring Regulations – Study when you want and pass your exam when you're ready…
05: Cable Size and Protective Device Selection The cable most commonly used in domestic electrical installations is the 70 °C thermoplastic PVC insulated and sheathed flat cable which is often referred to as ‘Twin and Earth’ or ‘T&E’ and is available in various sizes ranging from 1.0 mm² up to 16 mm². As well as … Read more
The most often used cable within domestic installations is the 70 deg thermoplastic PVC twin and earth which has a CPC built into it whose size has already been calculated using the formula method from regulation 543.1.3 and the normal sizes of the CPC in each cable are… 1.5mm2 T&E cable has a 1.0mm2 CPC … Read more