{"product_id":"34mm-round-dry-lining-box-white-pvc","title":"34mm Round Dry Lining Box - White PVC","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Knightsbridge 34mm round dry lining box is a white PVC housing designed for mounting downlights, smoke alarms and other electrical fittings into dry-lined cavity ceilings. The box has a 79mm outer diameter, a 34mm recessed depth and requires a 62mm cut-out in the plasterboard. Two 20mm knockouts at the rear allow cable entry from different angles depending on the routing.\u003c\/p\u003e\n\u003cp\u003eDesigned for residential and commercial installations where ceiling fittings need to be recessed into plasterboard backed by a cavity (typically 50-100mm air gap or insulation before the structural ceiling), the box provides fire containment and cable protection behind the visible fitting. The spring-loaded side tabs grip the rear face of the plasterboard when pushed through the 62mm hole, holding the box in place without additional fixings.\u003c\/p\u003e\n\u003cp\u003eThe white PVC construction is certified to BS 5733, the British Standard for general purpose electrical boxes and enclosures. The 34mm depth suits most LED downlights, GU10 fire-rated downlights and mains-powered smoke alarms that specify a shallow mounting depth. The box is supplied in shrink-sealed Knightsbridge multipacks.\u003c\/p\u003e\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e79 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecessed Depth\u003c\/td\u003e\n\u003ctd\u003e34 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCut-out Diameter\u003c\/td\u003e\n\u003ctd\u003e62 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003ePVC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/products_2002319_datasheet.pdf\" target=\"_blank\"\u003eProduct Specification Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat ceiling depth is required?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe box needs a minimum 34mm cavity depth between the plasterboard and the structural ceiling above. Most standard UK dry-lined ceilings provide 50-100mm cavity, so the 34mm box fits comfortably with room for cable routing and insulation clearance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is the box fitted?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCut a 62mm hole in the plasterboard at the fitting location. Feed the cable through one of the rear knockouts, then push the box up through the hole from below. The spring-loaded side tabs will grip the back of the plasterboard and hold the box in place without screws or additional fixings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat fittings does it suit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 34mm depth suits most LED downlights, GU10 fire-rated downlights and mains-powered smoke alarms. Check the specific fitting's required mounting depth before ordering — some larger halogen downlights or adjustable spotlights may need a deeper box.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it certified for fire protection?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe box is certified to BS 5733 for general electrical enclosures. For fire-rated ceiling assemblies, pair the box with fire-rated downlights that carry their own fire certification (typically 30, 60 or 90 minutes).\u003c\/p\u003e","brand":"Knightsbridge","offers":[{"title":"Default Title","offer_id":45293977403659,"sku":"SN8375","price":1.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/159016_9fb35611-2eeb-4cd7-a5dc-89004636e9c8.jpg?v=1714667041","url":"https:\/\/niori.co.uk\/products\/34mm-round-dry-lining-box-white-pvc","provider":"Niori","version":"1.0","type":"link"}