Should MCB's & RCBO's be Spaced Out in a Consumer Unit?

You may have noticed a trend on social media for electricians to space out the circuit protective devices in a consumer unit due to something called Thermal Derating. Why are they doing this? Is it necessary? Should you be doing this whenever you install an MCB or an RCBO? Join Original Joe as he unpicks this trend and considers guidance from the IET on the subject. Take the free Circuit Protection Mythbusting training module here 👉 https://training.efixx.co.uk/course/i... Made with support from @lewden3275 see their full offering of electrical installation equipment here: 👉 https://www.lewden.com/ Check out the other CPD content we've created with Lewden Palazzoli here: 👉https://training.efixx.co.uk/#/home 🕐 Chapters 🕕 ========================================== 00:00 Should Protective Devices be Spaced Out in a Consumer Unit? 00:14 Full free CPD Module on Circuit Protection: 👉 https://training.efixx.co.uk/course/c... 00:25 Spaced Out Trend. 00:46 What is Thermal Derating? 00:58 How does an MCB monitor overcurrent? 01:23 Other sources of heat and their effect. 01: 58 Is it that big a problem? 02:33 Do you need to space out the breakers for every installation? 02:53 A critical point and IET guidance. 03:12 Intermittent vs Continuous Loads 03:44 The circuits that may need spacing out 04:44 Loading Factors and Rated Diversity Factors 05:36 A worked example of a thermally derated circuit 07:03 How can we avoid thermal derating? 07:22 Do MCBs need installing from largest to smallest? 08:24 Next video in the series: 👉    • Warning: Potential Consumer Unit Issues wi...   08:25 Full free CPD Module on Circuit Protection: 👉 https://training.efixx.co.uk/course/c... ========================================== 📹 Presented by Joe Robinson - Technical Editor =================================== #electricaldesign #electricians #electricalinstallation