Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This one, about the 17th Edition (BS7671 - 2008) and how to report an earthing problem in an existing domestic wiring installation, is answered by SELECT:
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| Light switch - is it earthed? Picture by DIYHowTo. |
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Question: In carrying out an inspection and testing in a first floor flat, a bedroom circuit has lost its earthing. The circuit hasn't been touched since the original installation approximately 20 years ago. In the periodic inspection report, under 'Observations & Recommendations', how would one report this? At present, what I may do is replace the light backbox from metal to plastic. To trace the problem would be a nightmare.
Answer: The regulations are not retrospective and, under some previous installations, it was not a requirement to provide an earthing terminal at connection of a lighting point.
However, it should be ensured that, under these circumstances, only class 11 lighting accessories are installed - this would include the back box.
You should probably report this as a 'Deviation Code 4' - it does not comply with current regulations.
To see many more Q & A in Voltimum UK's Experts Area, please click on the link: http://www.voltimum.co.uk/consult.php?universe=consult.index.questions
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