{"product_id":"type-86-recessed-electrical-wall-back-box-switch-socket-mounting-white-blue-5pcs","title":"Type 86 Recessed Electrical Wall Back Box – Switch \u0026 Socket Mounting Box with Wire Slots, White\/Blue, 5pcs","description":"\u003ch2\u003eType 86 Recessed Electrical Wall Back Box – Switch \u0026amp; Socket Mounting Box with Wire Slots, 5pcs\u003c\/h2\u003e\n\n\u003cp\u003eStandard 86-type (86×86mm) recessed wall back boxes for switch and socket installation in residential and commercial buildings. The back box is embedded into the wall during construction or renovation — the switch or socket plate then mounts to the front of the back box using the two M4 fixing screws. Wire entry slots on all four sides and the rear allow cable routing from any direction. Available in white (for standard plasterboard\/drywall installation) and blue (for concrete and masonry installation with additional fixing lugs).\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e 86-type (86×86mm face, standard Chinese\/European square format)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 40mm (standard) or 50mm (deep, select above)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Flame-retardant ABS plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColors:\u003c\/strong\u003e White (plasterboard) \/ Blue (concrete\/masonry)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFixing:\u003c\/strong\u003e M4 screw fixing for switch\/socket plate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Entry:\u003c\/strong\u003e Knock-out slots on all four sides and rear\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Plates:\u003c\/strong\u003e All standard 86×86mm switch and socket plates\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 5 pieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e86-Type vs 118-Type Back Boxes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e86-type (86×86mm, this product):\u003c\/strong\u003e Square format. Standard in China, most of Europe, and countries following Chinese\/European electrical standards. Accepts single-gang 86×86mm switch and socket plates. The most common back box format globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e118-type (118×75mm):\u003c\/strong\u003e Rectangular format. Standard in Italy, Chile, Brazil, and countries following Italian electrical standards. Wider format accommodates multiple switch\/socket modules side by side. Not interchangeable with 86-type.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhite vs Blue Back Boxes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhite back box:\u003c\/strong\u003e For plasterboard (drywall) installation. Thinner walls, designed for cavity wall fixing with plasterboard fixing lugs or direct screw fixing into timber studs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlue back box:\u003c\/strong\u003e For concrete and masonry installation. Thicker walls with additional fixing lugs for embedding in mortar or concrete. The blue color is a convention in Chinese electrical installation to distinguish masonry boxes from plasterboard boxes — not a functional difference.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eHow deep should a back box be?\u003c\/h4\u003e\n\u003cp\u003eStandard depth is 35–40mm for most switches and sockets. Use a 50mm deep box when: (1) the cable has a large bend radius that requires more space behind the plate; (2) multiple cables enter the same box; (3) the switch or socket has a deep body (e.g., sockets with USB charging modules). Never use a back box shallower than the switch\/socket body depth — the plate will not sit flush against the wall.\u003c\/p\u003e\n\n\u003ch4\u003eHow do I install a back box in a plasterboard wall?\u003c\/h4\u003e\n\u003cp\u003eMark the box position on the wall. Cut a rectangular hole slightly smaller than the box face using a drywall saw or oscillating tool. Feed the cable through the back box wire entry slot. Insert the box into the hole and secure with the plasterboard fixing lugs (expand the lugs behind the plasterboard by tightening the fixing screws). Connect the cable to the switch or socket, then screw the plate to the back box using the two M4 fixing screws.\u003c\/p\u003e\n\n\u003ch4\u003eCan I use a 86-type back box with a 118-type switch plate?\u003c\/h4\u003e\n\u003cp\u003eNo. 86-type back boxes (86×86mm) are not compatible with 118-type switch plates (118×75mm). The fixing screw positions and box dimensions are different. Always match the back box type to the switch\/socket plate type.\u003c\/p\u003e\n\n\u003ch4\u003eWhat cable size fits through the wire entry slots?\u003c\/h4\u003e\n\u003cp\u003eStandard wire entry slots accommodate cables up to approximately 16mm OD. For larger cables or conduit connections, knock out the larger entry points on the box sides. Most residential wiring cables (1.5mm² and 2.5mm² twin-and-earth) fit through standard slots without modification.\u003c\/p\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResidential:\u003c\/strong\u003e Switch and socket installation in new build and renovation projects\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCommercial:\u003c\/strong\u003e Office and retail switch\/socket installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRenovation:\u003c\/strong\u003e Replacing damaged or undersized back boxes during switch\/socket upgrades\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNew construction:\u003c\/strong\u003e First-fix electrical installation before plastering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cp\u003e5 pieces — Type 86 recessed wall back boxes (color and depth as selected). Fixing screws included.\u003c\/p\u003e","brand":"Cable Parts Online","offers":[{"title":"Red \/ 5 pcs \/ Other","offer_id":47850625990901,"sku":"14:10;35:100009342;5:200000990#5 pcs","price":20.06,"currency_code":"USD","in_stock":true},{"title":"WHITE \/ 5 pcs \/ Other","offer_id":47850626023669,"sku":"14:29;35:100009342;5:200000990#5 pcs","price":20.06,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 5 pcs \/ Other","offer_id":47850626056437,"sku":"14:173;35:100009342;5:200000990#5 pcs","price":20.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/Sf8cb3e846a5048dcb1349fcb68a45940y.webp?v=1773899395","url":"https:\/\/www.csldmcml.com\/products\/type-86-recessed-electrical-wall-back-box-switch-socket-mounting-white-blue-5pcs","provider":"Cable Parts Online","version":"1.0","type":"link"}