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Facilitates connection of 4 pole incoming options within Wylex NH 125A Type B distribution boards. For use in conjunction with 4 pole switch and RCD incoming options. Includes all necessary live and neutral links, incomer mounting rail and busbar shrouding phase barriers. Live and neutral links, incomer mounting rail, busbar shrouding phase barriers, 3 x phase and 1 x neutral ID stickers and fixings.
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