{"product_id":"esp-duceri-3w-led-emergency-exit-box-self-test-surface-mounted-down-legend-white","title":"ESP Duceri 3W LED Emergency Exit Box Self-Test Surface Mounted Down Legend - White","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe ESP Duceri is a 3W LED emergency exit box with a down arrow legend, self-test function and lithium battery backup that provides three hours of illumination during mains failure. The unit operates in maintained mode, meaning the exit sign remains lit continuously on mains power and switches to battery automatically when power is lost. The self-test function runs periodic checks on the battery and LED, indicating faults via a front-panel LED status indicator.\u003c\/p\u003e\n\u003cp\u003eDesigned for surface mounting above exit doors, stairwells and final exit routes in commercial, hospitality, education and residential buildings where Building Regulations Part B (Fire Safety) require emergency lighting. The 402mm x 204mm x 71mm white steel housing mounts directly to wall or ceiling without recessing, and the IP20 rating makes it suitable for internal dry locations. The down arrow legend directs occupants towards exit routes below the sign position.\u003c\/p\u003e\n\u003cp\u003eThe 3W LED light source provides high-visibility green-and-white exit pictogram illumination visible from typical corridor and landing distances, while consuming minimal power during maintained operation. The lithium battery gives longer service life than older nickel-cadmium types and charges faster after discharge. Installation requires connection to a maintained emergency lighting circuit or unswitched mains supply with appropriate circuit protection.\u003c\/p\u003e\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\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/products_D520DWH_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\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does maintained mode mean?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMaintained mode means the exit sign remains lit continuously when mains power is present, and automatically switches to battery backup during power failure. This differs from non-maintained mode where the sign only illuminates when mains power is lost.\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 runs periodic checks on the battery charge level and LED operation, indicating any faults via a front-panel status LED. This reduces the need for manual testing and helps ensure compliance with BS 5266 emergency lighting standards.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat battery runtime does it provide?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe lithium battery provides three hours of illumination during mains failure, meeting the standard requirement for emergency exit signs in most commercial and residential applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be ceiling-mounted or only wall-mounted?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit can be surface-mounted to either wall or ceiling. When ceiling-mounted the down arrow legend directs occupants towards the exit route below. Mounting fixings are accessed from the rear of the housing.\u003c\/p\u003e","brand":"ESP","offers":[{"title":"Default Title","offer_id":45294134755595,"sku":"D520DWH","price":37.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/D520DWH_f3933c10-11f9-4519-9d74-214aabaea320.jpg?v=1714668505","url":"https:\/\/niori.co.uk\/products\/esp-duceri-3w-led-emergency-exit-box-self-test-surface-mounted-down-legend-white","provider":"Niori","version":"1.0","type":"link"}