A unique combined busbar tap-off unit and fused cut-out distribution board has been developed by Eaton engineers to provide power for dwellings in high-rise apartment blocks. It has been designed in collaboration with engineers from a London Borough for a refurbishment programme Each tap-off unit incorporates the supply authority’s cut-out fuses for up to 21 flats.
Special sliding joints have also been developed so that the in-line tap-off units can be removed easily from the riser if necessary for maintenance or upgrading at some future date.
Traditionally, specifiers call for separate enclosures incorporating R-Type fuses as service cut-out units. These are then connected via multiple cable runs from the ground floor or from busbar risers. By combining the tap-off unit and supply authority’s fuse distribution board into a single unit, installation time is reduced and less space is required.
The approach also means that the cut-out fuses are located outside the flats in a secure enclosure, accessible to authorised persons only. The enclosures are fully shrouded and sealable, and are themselves housed in locked riser cubicles.