{"product_id":"35mm-double-dry-lining-box-white-pvc","title":"35mm Double Dry Lining Box - White PVC","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Knightsbridge SN8380 is a 35mm-deep double dry lining box moulded in white PVC, designed for flush-mounting electrical accessories into plasterboard and dry-lined cavity walls. The box measures 144mm wide by 83mm high externally, requiring a 133x73mm rectangular cut-out in the plasterboard, and provides a 35mm recessed depth behind the wall surface for wiring and accessory back boxes.\u003c\/p\u003e\n\u003cp\u003eUsed during first-fix electrical installation in new builds and renovations, the box accepts standard UK double-gang switches, sockets and faceplates once the plasterboard is in place. Red locking lugs on each side grip the reverse of the plasterboard when tightened, pulling the front flange tight to the wall surface and holding the box securely without needing screws into studs or additional fixings. Cable entry channels moulded into the top and bottom edges guide twin-and-earth or conduit into the box, and a 20mm knock-out at the rear accepts standard PVC conduit where needed.\u003c\/p\u003e\n\u003cp\u003eThe box is certified to BS 5733, the British Standard for general purpose thermoplastic enclosures for electrical accessories. The white PVC construction is non-conductive, resists impact during installation, and remains stable in typical domestic wall cavity temperatures. Knightsbridge supplies the box in shrink-sealed multipacks for trade and contractor use, with each unit carrying a 25-year warranty against manufacturing defects.\u003c\/p\u003e\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e83 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e144 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecessed Depth\u003c\/td\u003e\n\u003ctd\u003e35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCut-out Box W\/H\/D\u003c\/td\u003e\n\u003ctd\u003e133x73 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_2002320_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 plasterboard thickness does this box suit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 35mm recessed depth suits standard 12.5mm plasterboard with 20-25mm of space behind for cable management. The locking lugs adjust to grip plasterboard between 9mm and 15mm thickness.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is the box secured to the wall?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRed locking lugs on each side of the box screw inward to grip the reverse of the plasterboard. As they tighten, they pull the front flange of the box tight to the wall surface, holding it securely without needing screws into studs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat accessories fit this box?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe box accepts any standard UK double-gang electrical accessory, including switches, sockets, dimmer modules, TV\/data plates and USB charging sockets. The 133x73mm cut-out matches the standard double-gang footprint.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 20mm knock-out pre-cut?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The knock-out at the rear is moulded into the PVC but remains intact until needed. It can be knocked out with a screwdriver or punch to accept 20mm PVC conduit where cable management requires it.\u003c\/p\u003e","brand":"Knightsbridge","offers":[{"title":"Default Title","offer_id":45293977436427,"sku":"SN8380","price":1.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/159018_0b477baa-d258-4fbc-a905-0f25a7ba39a4.jpg?v=1714667043","url":"https:\/\/niori.co.uk\/products\/35mm-double-dry-lining-box-white-pvc","provider":"Niori","version":"1.0","type":"link"}