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The feature-packed MEM Memera Consumer Unit range has been redesigned and expanded. It now includes units developed specifically to overcome problems faced by installers endeavouring to meet the requirements of the 17th Edition of the IEE Wiring Regulations (BS 7671), in particular the need for more wiring space when units are fitted with RCBO protection of individual outgoing circuits.
Features of the new range include:-
Electrical contractors have found that conventional consumer units do not allow enough space for wiring when RCBOs are fitted instead of MCBs to protect individual outgoing circuits. The range now includes an 11-way consumer unit designed specifically to take RCBOs and yet allow generous space for wiring above the devices. Individual RCBOs offer the highest possible level of personal protection demanded by BS 7671.
Other advanced features that have long distinguished the Memera 2000AD units are retained. These include the unique snappable busbar that allows on-site configuration of split-load units, a removable pan assembly that simplifies installation, and extremely flexible cut-out provision for cable entry in the rear of the moulded units.
The new units offer DP isolator or RCD incoming main switch options. Versions are available to satisfy the many configurations required to enable an installer to comply with the personal protection requirements of the 17th Edition of the IEE Wiring Regulations.
They include isolator-controlled single and dual RCD units, dual RCD variable split-load boards and the new 11-way RCBO board. In addition to the existing dual RCD split-load arrangement with two 80A RCDs, there is a cost-effective alternative with one 80A RCD and one 63A RCD. At the smaller end of the range are new one-way and 2/3-way units suitable for extensions and additions to existing installations, garages and outbuildings.
The moulded units are available with up to 19 outgoing ways, as with the existing Memera range, to cope with modern requirements for more circuits and/or special control and command devices. If more ways are required, two units can be linked together by means of AD coupling kits. Metal consumer units are available for surface or flush mounting and include dual-rail units offering up to 38 outgoing ways, as well as multiple RCD split-load units and dual/multi tariff arrangements.
The new range of outgoing devices includes single-module miniature circuit-breakers (MCBs) up to 63A and single-module RCBOs (combined MCBs and RCDs) up to 45A. In addition to the standard Type B devices, Type C MCBs and RCBOs are also available for applications involving high inrush currents, such as some lighting loads, which are prone to cause nuisance tripping with some Type B devices. The offering also includes a full range of control and command accessories including timers, relays and contactors.
The new MEM Memera consumer unit range supersedes the Memera 2000 and 2000AD ranges. Devices will continue to be available to fit these units for the foreseeable future.