BG Electrical Circuit Protection Shower Kit, IP65 Rated Metal Enclosure, 63 Amp, 240 x 176 mm

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Now connect the Neutral wire “N” (Blue color) to the input “N” terminal of RCD. The output “N” terminal of RCD should be connected to the Neutral busbar terminal in the consumer unit.

Aside form the Part P requirements, there are quite a few other rules that govern how a ring main is installed such as the type of cable that can be used, the total floor area the circuit covers, the total length of the circuit and whether it’ll be powering outdoor appliances, more on this below. The second condition applies to any circuits where an earth fault current is not sufficient to blow the fuse, or trip the switch in the designated time allowance stated in the regulations. 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 However to be sure that your electrician is doing it correctly, this is generally the process that’s followed: A standard ring main, final main, ring circuit or final circuit ring How Does a Final Ring Circuit or Ring Main Work?To do away with any potential issues such as these, the older fuse wires have been replaced by their modern equivalent, the MCB or miniature circuit breaker. When it comes to the name, ring main is a term which has been used for years and in all likelihood will continue to be used for many more to come, but it is in fact incorrect, it’s just easy to say! Once all of the MCB’s have been connected up, the final job then is to simply connect the earth running from the meter to the earth bar in the consumer unit

Note: As the earth wires are bare, once connected up it then needs some earth sheath slipping over it to signify that it’s the earth. Floor Area for a Ring Main or Final Ring Circuit Finally, for more help and information on staying safe when working around electricity, see our electrical safety project here. What is a Ring Main or Ring Final Circuit or Final Circuit? One of the most important jobs your electrician will (or should) do before starting such a job is to first ensure they test all of the existing circuits in the property to make sure they function correctly and have no issues. The major difference between this type of consumer unit and the below type is that this one does not feature an RCD’s so in terms of it’s relevance today, is now considered a little old-hat! If you would like to find out more about these circuits, see our project on radial circuits. How Can I Tell if my House has Radial Circuits or Ring Mains (Final circuits)?Finally, the electrician then issues an EIC or DEIC (Electrical or Domestic Electrical Installation Certificate) certificate for all the work that has been carried out. Under Part P as replacing a consumer unit is notifiable works this is a legal requirement. We would like to thank one of our forum members for answering this question in our busy electrical forum, more information can be found on testing circuits here. A Garage Consumer is a type of consumer unit and distribution board (aka mini consumer unit) used to extend and provide electric supply to the exterior buildings such as shed, workshop or other outdoor installations in the garage. The split board shown here has one RCD and is a simple version to show the user how the board works, however most modern split load boards feature 2 RCD’s. As both ends of the ring are connected to the same terminals at the consumer unit, the current runs in both directions imposing less of a load on the cables. Electricity loses power over long lengths of cable and trying to put too much power through a cable which is not designed for it is dangerous, so a ring main delivers power from both ends to keep the load as light as possible.