#Iee wiring regulations 17th edition portable
#Iee wiring regulations 17th edition series

There is a new exception if the cables can be mechanically protected during the construction process, though this may be difficult to implement in practice. With respect to cables in metal studwork walls, the exception for installations under the control of skilled persons has been removed and now unprotected cables run in metal studwork walls will require 30mA RCD protection irrespective of the cable depth from the surface. Where cables are held within non-metallic containment systems the cabling must be retained with metal clips or cleats. All containment and cabling systems must now be affixed using metal support systems including metal cable ties or held within metal containment. As such the new regulations call for all cabling and containment systems in escape routes to be supported such that they will not be liable to premature collapse in the event of fire. In the past a number of cases have been sighted where firefighters have become entangled in cabling that has collapsed from high level to block escape routes with resultant loss of life. Whilst steel is footnoted, this is not meant to exclude the consideration or use of non-combustible plastic. The consumer unit can be enclosed within a non-combustible or not readily combustible cabinet. This risk assessment must accompany the Electrical Installation Certificate.Дomestic style consumer units now have to be constructed from a non-combustible or not readily combustible material when fitted in domestic premises, though commercial premises are not affected by this new regulation. For all installations in commercial premises that omit RCD protection, the designer of the installation must obtain a documented risk assessment stating that RCD protection is not required.

#Iee wiring regulations 17th edition portable

All sockets up to and including 32A that could be used to supply portable equipment outside (externally) must now be RCD protected via a 30mA device. There are only two exceptions to the rule and these are in cases where, other than for installations in a domestic dwelling, a documented risk assessment determines that an RCD is not necessary, and for a specifically labelled or otherwise suitably identified socket outlet provided for the connection of a particular item of equipment. Part 4 of Amendment 3 details these changes and tables 41.2, 41.3, 41.4 and 41.6 have been revised to suit.ДЄll sockets with a rating of up to and including 20A must be RCD protected under the new regulations. This will obviously reduce the tabulated values of Zs by 5%. In essence this has been done to take account of supply voltage levels, which often fluctuate. The term вЂCompetent PersonвЂ™ has also been changed to a revised title вЂSkilled Person (Electrically)вЂ™, and вЂInstructed Person (Electrically) has replaced вЂInstructed PersonвЂ™.Д®arth Loop Impedance (ELI) Zs values are now subject to a correction factor known as Cmin of 0.95.

#Iee wiring regulations 17th edition series

Amendment 3 does contain a number of fundamental changes, however, that as an industry we all need to be fully aware of.ДЇirst, regulations coming from Europe CENELEC standards now have a 100 series reference and UK standards now have a 200 series reference older regulations remain unaffected but will be revised in the next edition. New requirements do not apply to domestic style consumer units until 1st January 2016.ДЄs always with changes in regulations, there are a number of minor tweaks to regulations, clauses, and text, though more often than not these changes are to realign with industry or to clarify and further enhance the content of the regulation.Any projects, design work or installation complete prior to the end of June 2015 may follow either Amendment 2 or Amendment 3.Electrical Installation Condition Report (EICR) of installations from 1st July 2015 should demonstrate compliance with these new regulations.All projects / installations that are designed from 1st July 2015 shall comply with this new edition.The new regulations came into effect on 1st July 2015 and the main headline changes / effects on electrical installations are as follows:. On the 1st January 2015, the 17th Edition Wiring Regulations BS7671 were updated under the new title вЂIET Wiring Regulations 17th Edition Amendment 3вЂ™ this new edition and accompanying вЂOn Site GuideвЂ™ are now issued under a yellow cover. Craig Smith, Associate Director of Rolton Group, has studied and summarised the latest amendments the IET Wiring Regulations, 17th Edition below to help others get to grips with the changes.