Radial Circuits 17th Edition

One single or one twin using 2 5 mm sq.

Radial circuits 17th edition. Similar restriction apply to both the ring and radial with regard to unfused and fused spurs. On a historical note ring final circuits were introduced in 1947 in the uk to save on materials in post war reconstruction. Radial power circuit description. Wiring regulations 17th edition amd 2.

Fused spurs as many sockets as you want but remember the maximum 13a fuse in the spur. Ring final circuits are still included in the 18th edition wiring regulations some feel this type of circuit should have been done away with in the 17th edition. As many as you want using 4 0 mm sq. Circuits in general.

Have a look at appendix 15 bs7671 2008 a3 2015 there are even pictures. Radial socket circuits 20a radial 2 5 mm sq. On our website you can purchase 17th edition consumer units 17th edition multi tester and 17th edition junction boxes 17th edition compliant consumer units and junction boxes. Wiring regulations 17th edition amd 1.

Wiring regulations 17th edition amd 3. Bad contractor jobs. As many as you want using 2 5 mm sq. There are two types of radial circuit used for sockets type a2 which uses 4mm csa twin earth fused at 30a or 32a covering a floor area of 75m and type a3 which uses 2 5mm csa twin earth fused at 20a covering a floor area of 50m.

The theory much argued at the time was that less materials copper were used by running a ring around a room or rooms than running a long radial or radials around the room s due to the reduced conductor csa that could be safely used. So after years of installation and inspection and testing i think i ll have to come down on the side of the radial circuit for sockets and i m guessing that in the years to come 18th edition we will see the dropping of the. Unfused spurs off a 30 32 a radial. My electrican friend tells me during his 17th edition course he has been informed all socket radial circuits should be on a 16 amp mcb and not a 20 amp.

Unfused spurs off a 20a radial. There are two types of radial circuit used for sockets. The circuit was introduced many years ago at a time of copper shortage and deliberately uses undersized condutors to feed a circuit of unknown load with an unlimited amount of socket outlets. 30a 32a radial 4 0 mm sq.