{"product_id":"metal-clad-bt-master-telephone-socket-grey","title":"Metal Clad BT Master Telephone Socket - Grey","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Knightsbridge M7300 is a metal clad BT master telephone socket housed in an 81mm square powder-coated steel enclosure with an integrated metal back box. The socket includes a built-in surge arrestor and R\/C filter for line testing compatibility, making it suitable for primary telephone line termination in commercial, industrial and high-use domestic environments.\u003c\/p\u003e\n\u003cp\u003eDesigned for installations where physical protection is needed — workshops, warehouses, plant rooms, garage conversions and external covered areas — the steel construction resists impact damage that would crack or break a standard plastic faceplate. The IP20 rating provides protection against finger contact and objects larger than 12.5mm, suitable for indoor dry locations. The socket accepts a standard BT plug and uses screw terminals for line connection.\u003c\/p\u003e\n\u003cp\u003eThe powder-coated silver-grey finish provides corrosion resistance and a neutral appearance that blends with industrial settings and utility spaces. The metal back box is supplied as part of the unit, eliminating the need to source a separate enclosure. The 48.4mm projection from the wall includes both the faceplate and the integral back box, so no additional depth allowance is needed beyond the unit itself.\u003c\/p\u003e\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e81.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e81.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e48.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eSPCC Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003ePowder-coated Silver\/Grey\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP Rating\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEarth Terminal\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNeon Indicator\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal\u003c\/td\u003e\n\u003ctd\u003eScrew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e2 Year Guarantee\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\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\/datasheet-M7300.pdf\" target=\"_blank\"\u003eProduct Specification Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a master socket or a secondary extension?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is a master socket, designed to be the primary termination point for an incoming BT telephone line. It includes a surge arrestor and R\/C filter for line testing, which secondary extension sockets do not have.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it need a separate back box?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The unit is supplied with an integral metal back box as part of the assembly. The 48.4mm depth measurement includes both the faceplate and the back box, so you do not need to source or install a separate mounting enclosure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere is this typically installed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe metal clad construction suits environments where physical protection is needed: workshops, garages, plant rooms, warehouses, external covered areas, and commercial premises where impact damage to a standard plastic socket would be likely.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the surge arrestor protect?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe built-in surge arrestor provides protection against voltage spikes on the telephone line caused by lightning strikes or electrical faults. The R\/C filter maintains compatibility with standard BT line testing equipment used by telecoms engineers.\u003c\/p\u003e","brand":"Knightsbridge","offers":[{"title":"Default Title","offer_id":51391508644107,"sku":"M7300","price":9.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/194412_d44edd3f-e741-420c-adc3-f612c6727fcf.jpg?v=1747061130","url":"https:\/\/niori.co.uk\/products\/metal-clad-bt-master-telephone-socket-grey","provider":"Niori","version":"1.0","type":"link"}