RADIAL SOCKET SPURS. How to install them correctly and safely.

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SPURS ON RADIAL SOCKET CIRCUITS may look the same as any other spur but they must be treated differently to those on ring circuits. This is one of the often asked questions and is an often misunderstood issue.
Why should radial sockets be treated any differently?
Are sockets allowed on radial circuits?
What size breaker must it be? Is it always 32 amps?
Here, in this video, we will show you several different scenarios and give you the information that you need to be able to install spurs on to radial circuits efficiently and safely.
A correctly installed spur will help to protect the users from the dangers of electricity and reduce the risk of fires in buildings.
In the video we will also explain the requirements of the Wiring Regulations in relation to radial spurs so that you are able to carry out the work with confidence.

Electricity is dangerous. Always work within your capabilities and seek competent advice if required.
This video is for general guidance and education only, every electrical situation is different and you must ensure that you have taken appropriate steps to ensure your safety and understanding of the particular circuit that you are working on. Not every electrical situation can be covered in this video.

[learnelectrics]

SEE ALL - To view a list of all our LearnElectrics videos, click on the link below.
There are many videos on many electrical topics including Installation, Part P, 18th Edition, Testing, Certification, Lighting, Sockets, Ring Circuits and much more.

[justinetucker]

This is a fabulous channel for anyone wanting common sense and clarity. Please keep making more videos as you just have a gift in being able to transfer your knowledge so easily. So glad I found it!

[allahdittababu]

Honestly this channel should be up there with 100k subscribers very informative and clears a lot if doubts ... one request could you do a video on kitchen wiring design using just a 6/4 mm cable spuring off for cookers, sockets etc I know the ring design with 32 amps and cooker with 20 amps but I'm really interested in how electricians use just the one radial circuit with fuse spurs using 4/6mm cable

[stevem]

Just about to wire my shed. This video is like gold dust, ! A rare but valuable explanation which I’ve been looking for, for ages. Thank you, I will follow these rules to the letter.

[MasterControl-MCP]

Doing my house extension electrics, following your instructional videos has helped me no end and saved me £££, thank you!

[websurfer]

This is very clear and helpful, i am a lot clearer now on radial circuits.

[asimf]

Really good tutorial. Answered all my questions. Many thanks

[jahcoma]

Love it confirms my understanding of a radial

[pinchermartyn]

Top notch channel. Thank you for your work. Your teaching is so valuable.

[variousrants]

Perfectly informative and helpful. It’s given me valuable information to add additional sockets in my garage. Really appreciate your effort

[iqbalnuthoo]

very good explanation, better than at college

[danielteyehuago]

Wow! This is very informative, thanks for sharing it with us Dave. It worth it and the best tutorial on the topic for me...dl

[johnburns]

At 5:48. The two spurs with only two single sockets on each. These two spurs off the 4mm radial can be in 2.5mm cable. The maximum current the two sockets on each spur draws is 26A (13A for each socket). The fuses in the plugs limit the current draw on this spur, not the 32A MCB at the consumer unit. 2.5mm cable is rated at approx 27A maximum current draw, so 2.5mm is suitable. If the 2.5mm cable is seriously derated because of being surrounded by insulation, etc, it can draw a max of 25A, then 4mm cable has to be used.

No need for an FCU in the spur as the fuses in the two plugs will allow only a max 26A to run in that spur, below the 2.5mm cable's current rating.

[gujit]

at 7:51 why is the bottom left socket ok using a 2.5mm cable? theres no fuse between the socket and the break unlike the FCU on the right

[johnfieldhouse]

I am trying to work out how to do a radial run from a 32amp breaker that needs 4 FCUs for washing machine, dishwasher, extractor hood and built in microwave. Your video says that it needs to be run with 4mm cable but as I understand it the FCUs must be spurred off sockets meaning that 3 cables need to go into each terminal on the socket. But three 4mm cables don’t fit. Can you advise me please on what to do? There are no free 20amp breakers available in the consumer unit. Thank you for your time. These videos are excellent.

[nigelglover]

You dont mention what the round white boxes are on your circuit diagrams? Presumably they are junction boxes to aid the extension of the circuit? Example at 05:42 into the video. Thanks

[willo]

I have just started my kitchen unit refurb, and have found just 1 twin socket wired to a radial circuit
The radial is the old cooker circuit, now on a 16A MCB, in CU.

2.5mm cable to the socket, from junction box fed with 6mm (original cable).

Pretty sure i can have a few more sockets & extractor feed from this circuit ??

[thisandthat]

Hi buddy, great video as usual. But quick question. For 32amps radial circuit in the osg the only reference method where the cable current carrying capacity is more than 32amps is clipped direct i think without it having it front of me. Would you not go 6mm just to be safe? Im still learning so just asking mate.

[MHALI-qvyc]

Can you connect 5 different kitchen appliances on a radial on 4mm cable or is it best to add it to ring

[okaro]

27 A for 2.5 mm² sounds much. In Finland max allowed is 16 A (theoretically 19 A). On surface mount one could use 25 A.