Garage Consumer Unit IP65 4 Way Fuse Box Fitted with RCD 63amp 30ma + 1X6amp, 2X20amp & 1X32amp mcbs

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For further information on staying safe when working around electricity, see our electrical safety project here. Despite this there remains many still in use in many homes across the UK today, however whether they are still legal very much depends.

Each MCB is installed by clipping it onto a DIN bar and the "teeth" of the bus bar are inserted into the base of each MCB. This carries the live current into the MCB and the cable that supplies the given circuit are connected to the top section. RCD’s also work by detecting an imbalance between the Live and the Neutral conductors and this feature is a requirement for all Class 2 double insulated equipment.RCBO’s used in a consumer unit in place of RCD’s – Image courtesy of the BS7671 18th Edition Wiring Regulations High Integrity Consumer Unit / Three-way Split Consumer Unit If an intumescent strip is used for fire sealing, they must not be used inside of our boards. Taken from instructions. Tests on Hager consumer units have indicated that there is no specific need for external fire rated cable glands or intumescent sealing in addition to the guidance below, with respect to achieving a non-combustible enclosure. However, this does not preclude the designer/installer from using fire rated cable glands or external intumescent sealing should they consider necessary. To conclude, internal intumescent pads shall not be used. For this reason, there is no such thing as a 'standard consumer unit' - but while the number of sizes, makes, brands and combinations of configurations is almost infinite there are in factonly fourmain types of consumer unit. Although used in most types of consumer unit setup, they are not required for those with RCBO’s as these do exactly the same job but with additional safety features. As they are very sensitive to the slightest bit of earth leakage, it is not practical to fit one RCD to protect the whole house, hence the reason they are split over 2 circuits, normally one upstairs and one for downstairs.

Again, it entirely depends on your existing electrical layout as to how this is done, but your electrician will certainly know. For this example we are going to keep things very simple and use a consumer unit with 1 main double pole isolations switch, 1 RCD and a couple of MCB’s just to show how they are connected. Essentially each MCB is wired up in the same way so can just be repeated. Finally, you may wish to upgrade your fuse box or consumer unit to a larger capacity model, more able to cope with extra demand if you are extending your home.An RCD is a manually operated isolator switch, but it is also an automatic safety device that will trip and cut off as soon as it senses an earth fault, or indeed earth leakage.