Electrical Radial Circuit Diagram

Wiring a radial circuit in this diy guide you will learn how to wire up a standard radial circuit and also ensure that it is safe by using the correct size of cable and also the correct mcb in the consumer unit.

Electrical radial circuit diagram. Radial socket outlet circuits are less common in uk dwellings as until recently the usual method was the ring circuit. Electrical radial circuit wiring including the size of cable and mcb that should be used. It is used extensively to serve the light and medium density load areas where the primary and secondary circuits are usually carried overhead on poles. Loop wiring is radial wiring in lighting circuits where junctions are made at ceiling roses with line and switched line wires.

Radial and loop a circuit where each load is supplied by a single cable. A radial circuit must follow these rules in general. Ring main ring main circuit starts from the consumer unit connects to a number of electrical devices typically sockets and then returns to the consumer unit. The radial type of distribution system a simple form of which is shown in figure 2 is the most common.

Each house should ideally have at least two lighting circuits. In modern domestic properties in the uk the main electric lighting circuits are separate from the power ring main circuit. Ring or ring final circuit rfc. I e the cables branch or radiate outwards from a single supply point.

For example a 20a radial circuit can supply up to 50 square metres and 32a radial circuit can supply up to 100 square metres. Always isolate any electrical circuit before working on the circuit. In other words the consumer in the radial electrical distribution system would be in darkness until the feeder. In case of transformer failure also the power supply is interrupted.

Floor areas of no more than 50m2 requires a 20 a fuse or miniature circuit breaker protection with 2 5 mm live and 1 5mm protective conductors or 1 5 mm if m i. Radial circuits are used for lighting there is one lighting circuit on each lighting mcb lighting circuits are usually on a 6a mcb or 5a fuse though 10a can be used with some extra restrictions now removed in the 17th edition of the wiring regs for large circuits however if the area served is large more 5a or 6a circuits would in most cases be preferable. Socket wiring as described above a radial circuit starts at the consumer unit connects to each socket outlet in turn and ends at the final socket outlet.