CBR:MCCB + Residual current protection (Non-domestic >100A) AFDD: RCBO* + Arc Fault protection. Memera full metal consumer units The Eaton range of full metal consumer units provide a suite of products to meet the requirements of BS7671:2018 18th Edition IET wiring regulations. Discuss RCD protection on 3 phase sockets/18th edition in the Electrical Forum area at ... ( e.g insulated consumer units in domestic premises were ok upto said date or ongoing jobs started prior to the date could continue to be installed to the pre ammendment standard, hopefully ive understood that correctly). Not long ago this section was amended to mandate the use of non-combustible consumer unit enclosures in all domestic household premises, which adequately demonstrates the scope and purpose of this section. RCBO: MCB + Residual current protection. The 18th Edition Regs list the following RCD formats: RCCB:Residual current protection only. Learning outcomes 1 Review some of the main changes within the IET Wiring Regulations 18th Edition BS 7671:2018 2 Understand the technology of Residual Current Devices (RCDs), where to use them and their main benefits 3 Explore Arc Fault Detection Devices (AFDDs), where to use them and what their main benefits are 4 Understand the technology of Surge Protection Devices (SPDs), By comparing the two versions, it can be seen that the new version: The publication of the 18th Edition of the IET WIring Regulations (forthcoming BS 7671:2018) is imminent, and BSI and the IET have publicised some of the key changes, which can be viewed on the IET web-site.. I think my confusion came from putting RCD on all light circuits on domestic installations in 18th edition and I mixed it up with commercial, thanks for clarification and help! Chapter 42 (section 421) includes regulations that deal specifically with protection against fires cause by electrical equipment. Image from IET web-site. Final circuits providing 30 mA protection. Todays 18th edition consumer units incorporate an enclosure manufactured from non-combustible material, i.e. Footnote; The term RCD is used within the wiring regulations more than 250 times and the definition of RCD includes RCCB, RCBO, CBR and MRCD, readers are advised to follow the requirements of the IET Wiring Regulations BS7671:2018. With the 18th Edition of BS 7671 just around the corner, we take a look back at the last amendment to the 17th Edition of BS 7671 and the requirements for using RCDs in non-domestic environments. Get more on the 18th Edition. A new, revised version of Regulation 411.3.3, relating to RCD protection of socket-outlets, forms part of BS 7671:2008+A3:2015 (IET Wiring Regulations Seventeenth Edition), which was published in January 2015 and comes into effect on 1 July. RCD protection. When Amendment No. This is a commercial premises where there is an existing cabling already and we are going to replace lights like for like so no extra cabling as well. The latest amendment to the IET’s Wiring Regulations reinforces the requirement for using residual current devices (RCDs) in non-domestic environments. (415.1) 30mA RCDs are used for additional protection (531.3.3) for general purposes Type AC RCDs may be used (722.531.2) for EV chargers Type A or B are required (710.411.3.2.1)in some medical locations Type A or B are required – depending on fault currents The current and new versions of the regulation are shown side by side below. The omission of RCD protection by labeling a socket ... - Premises with sleeping accommodation. Must be used with MCB for overcurrent and short circuit protection. a full metal enclosure. What sections of the 18th Edition refer to RCDs? Todays 18th Edition Regs list the following RCD formats: RCCB: Residual current protection.. 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