Industry Comment

BS 7671 18th Edition:Get up to speed and ensure compliance

With the topic of fire safety in buildings ever present, 2018 looks set to bring new changes for electrical contractors through the 18th Edition of BS 7671 Wiring Regulations, and it’s only months away. Metprotakes a closer look at the changes.

ensure that escape routes were as safe as possible for civilians and rescue services in the event of a fire. Following the fatalities of two firefighters in 2010 and a


recommendation in the subsequent coroner’s report, Amendment 3 of BS 7671 made it a requirement that wiring systems should not be liable to premature collapse. This entailed all surface cables and all cables inside plastic trunking in building escape routes not to be secured using only non-metallic supports (plastic). This measure was introduced in order to ensure cables were retained safely for as long as was necessary to protect firefighters entering a building in the event of a fire.

Cable retention Three years on from the last update, the British Standards Institute is now preparing to publish the 18th Edition of BS 7671 and widespread expansion to cable retention is proposed to feature within this. Expected to be available from July 2018 and take full effect from

January 2019, the 18th Edition proposes to broaden this key regulation to include wiring systems installed in all locations, not just escape routes. This change recognises that firefighters will not necessarily access a building via escape routes and, as such, adequate protection should be provided. With just months until the 18th Edition of BS 7671 is launched, advising product compliance is critical and here at Metpro we are ready to help with our Chapter 52 Fire Resistant Range. Designed in-house and fully compliant to BS 7671 Wiring Regulations, our range consists of fire resistant cable clips for PVC trunking and fire resistant white spacer bar saddles for PVC conduit.

Ideal for retrofitting Covering all sizes of PVC trunking from 25x16mm mini-trunking up to maxi trunking sizes, Metpro Chapter 52 Fire Resistant Cable Clips offer simple installation through their unique off-centre fixing slot, making them ideal for uneven walls and retrofitting. Cables are retained securely within the easy-fold tabs and the smooth-edged design ensures cables are not


SBS20WH 20mm Fire-Resistant Spacer Bar Saddle.

when installed. Colour

matched to suit March 2018 electrical wholesaler | 35

s part of the previous update, BS 7671:2008 Amd 3 introduced a multitude of new regulations, not least of which was the inclusion of a new requirement designed to

most UK systems, Metpro Chapter 52 Fire Resistant White Spacer Bar Saddles are available for both 20mm and 25mm diameter PVC conduit. Our saddle finish is Halogen Free to meet the requirements of even the most controlled environments in a fire situation.

Fire rated All Metpro Chapter 52 products have been tested in the UK, exceeding the stringent requirements of BS 8434-2 including the shock and water spray trial undertaken by Exova Warringtonfire. The entire Chapter 52 range is fire rated to 930°C for 120 minutes ensuring 100% confidence for Metpro stockists and their customers. Full certification is available on request. In addition we

Metpro’s FRC25 fire-resistant clip from the Chapter 52 Fire-Resistant Range.

are also able to offer the required fixings for use in conjunction with our Chapter 52 products offering absolute compliance to both the current and proposed Standard. Although the publication of the BS 7671 18th Edition is still a few months away, current regulations already require cables installed in escape routes to be retained by metal clips or saddles. For further information on the BS 7671 18th Edition call 0121 552 2100 or email

Three years on from the last update, the British Standards Institute is now preparing to publish the 18th Edition of BS 7671 and widespread expansion to cable retention is proposed to feature within this.

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