{"product_id":"duceri-3w-led-maintained-emergency-exit-box-self-test-surface-mount-right-legend-white","title":"Duceri 3W LED Maintained Emergency Exit Box Self-Test Surface Mount Right Legend - White","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Duceri D520RWH is a surface-mount emergency exit box with a 3W LED lamp, integrated self-test function and lithium battery backup providing maintained or non-maintained operation. The white polycarbonate housing measures 402mm x 204mm x 71mm and carries a right-arrow running man legend on a green backlit panel, conforming to BS EN 60598-2-22 and BS 5266 emergency lighting standards.\u003c\/p\u003e\n\u003cp\u003eDesigned for commercial, hospitality and public building installation, the Duceri mounts directly onto walls or ceilings above final exit routes, fire exit doors and escape corridors where directional guidance is required. The self-test function automatically checks the battery charge level and LED operation at regular intervals, logging fault data to simplify maintenance inspections and reduce manual testing requirements. The maintained mode keeps the LED illuminated during normal mains operation, switching to battery power during a mains failure.\u003c\/p\u003e\n\u003cp\u003eThe lithium battery chemistry provides a longer service life and more stable charge retention compared to nickel-cadmium alternatives, typically requiring replacement every 4-5 years rather than 3 years. The IP20 rating makes the fitting suitable for indoor use in dry locations. The white finish integrates cleanly with suspended ceilings, painted plasterboard and commercial corridor interiors without drawing excessive attention during normal operation.\u003c\/p\u003e\n\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Net Weight (KG)\u003c\/td\u003e\n\u003ctd\u003e1.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Gross Weight (KG)\u003c\/td\u003e\n\u003ctd\u003e1.438\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Gross Weight (KG)\u003c\/td\u003e\n\u003ctd\u003e8.63\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Length (mm)\u003c\/td\u003e\n\u003ctd\u003e402\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Width (mm)\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Height (mm)\u003c\/td\u003e\n\u003ctd\u003e71\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Length (mm)\u003c\/td\u003e\n\u003ctd\u003e420\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width (mm)\u003c\/td\u003e\n\u003ctd\u003e425\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Height (mm)\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/products_D520RWH_datasheet.pdf\" target=\"_blank\"\u003eProduct Specification Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/manual_D520Manual.pdf\" target=\"_blank\"\u003eProduct Manual\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between maintained and non-maintained operation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMaintained mode keeps the LED illuminated continuously during normal mains operation and switches to battery power during a mains failure. Non-maintained mode only illuminates the LED when the mains supply fails. The Duceri D520RWH can be configured for either mode during installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the self-test function work?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe self-test function automatically checks the battery charge level and LED operation at programmed intervals, typically monthly for a short functional test and annually for a full-duration discharge test. Fault data is logged internally and indicated by status LEDs on the fitting, reducing the need for manual testing and simplifying compliance inspections.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does the lithium battery last?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLithium batteries in emergency lighting typically provide 4-5 years of service life before requiring replacement, compared to 3 years for nickel-cadmium alternatives. The self-test function monitors battery condition and will indicate when replacement is needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat emergency duration does it provide?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe battery backup provides 3 hours of emergency illumination during a mains failure, meeting the standard requirement for most UK commercial and public buildings under BS 5266. See the specification sheet in the Downloads tab for exact battery capacity and duration ratings.\u003c\/p\u003e","brand":"ESP","offers":[{"title":"Default Title","offer_id":45294134460683,"sku":"D520RWH","price":37.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/D520RWH_b4610eba-3460-4463-b734-7cd02929d934.jpg?v=1714668502","url":"https:\/\/niori.co.uk\/products\/duceri-3w-led-maintained-emergency-exit-box-self-test-surface-mount-right-legend-white","provider":"Niori","version":"1.0","type":"link"}