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IET - Technical Article - Floor and Ceiling Heating Systems
IET

IET - Technical Article - Floor and Ceiling Heating Systems

IET

IET - Technical Article - Floor and Ceiling Heating Systems

Published: 12 July 2013 · Category: Technical articles

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WiringFeature #45 FLOOR AND CEILING HEATING SYSTEMS A look at the requirements for the installation of electric floor and ceiling heating systems, together with the associated risks. By Geoff Cronshaw The 17th Edition of the Wiring Regulations (BS 7671:2008) introduced additional sections on special locations in 2008 that were not previously included in the 16th Edition. Among the special locations introduced were requirements for floor and ceiling heating systems contained in section 753 of BS 7671:2008. Risks The obvious risks associated with floor and ceiling heating systems are penetration of the heating element by nails, drawing pins, screws, etc., pushed through the ceiling surface. Similarly, there are concerns that underfloor heating installations can be damaged by carpet gripper nails, etc. To protect the building structure and provide precautions against fire, there are requirements to avoid overheating of the floor or ceiling heating system. Protection against electric shock As you would expect the protective measures of obstacles, placing out of reach, non-conducting location and protection by earth-free local equipotential bonding are not permitted. These measures are contained in Sections 417 and 418 of BS 7671:2008 and are not for general application. The protective measures of section 417 provide basic protection only, and are for application in installations controlled or supervised by skilled or instructed persons. The fault protective provisions of...

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