A spur can be connected to an existing socket, on either a ring main or a radial circuit, providing that socket does not already have a spur. A general rule for a ring main is that if you only have two cables in the back of an existing socket then it is ok to spur.
How many sockets can you have on a ring main spur?
Only one socket outlet can be connected to a spur. (This can be a single or double outlet). Connecting a further outlet is NOT permitted, as this could overload the single cable supplying it. Each socket outlet or junction box on the ring can only have one spur connected.
Can you put a junction box on a ring main?
Junction boxes are rated in amps to protect them, you and the circuit. Make sure you have the right box for the right job. It is possible to use a higher amp rated junction box on a lower rated circuit, but never the other way around – To summarise: Ring mains and radial circuits = 30 amp.
How many times can you spur off a ring main?
The limit of one spur per point is if the point which is spurred off is UNFUSED. If you fuse it to 13A you can put as many as you want on it. The reason I explained was that standard final ring circuits wired in 2.5mm2 T&E are designed such that any point on the ring will not be loaded above 20A for an extended period.
How many times can you spur off a radial circuit?
The simple answer to this question is yes you can and this is known as a spur, or spurred socket, but there are a few things that you nee to be aware of. You can add one further accessory or socket off of a single socket present in a radial circuit and no more.
Can I install a fused spur myself?
As long as the job isn’t within a ‘special location’ such as a bathroom or outdoors, you’re also allowed to install additional new light fittings, switches, sockets and even add a single fused spur to an existing circuit (a ‘spur’ is a new cable and socket run as a branch from an existing socket on the ring main).
How many times can I spur off a spur?
5 Answers from MyBuilder Electricians Ok if it is all fused through a 13 amp Spur unit then you can have as many as you want, but limited to 13amp total. It must be off of a radial or a ring circuit as I can’t think of another type of power circuit. If it’s off of a radial though it’s fine.
Can I add a socket to a ring main myself?
Does a spur need to be fused?
“The regulations state that the appliance needs to be fused, either with a plug or a fused spur. So as long as the plug sockets are accessible without touching the appliance to turn it off then this is fine, but also a fused spur is fine too.”
Which is better ring or radial circuit?
Ring circuit wiring offered a more efficient and lower cost system which would safely support a greater number of sockets. The lower costs aspect was related to fact that wires with a smaller diameter could be used, compared to radial wiring. Ring circuits provide low protection against overcurrents.
Can I use a spur on a ring main circuit?
The spur can be taken from any socket or FCU within the Ring Main circuit. The spur not only supplies a socket but may supply FCU`s as well. The rule is that you can spur off one socket from a point within a Ring Main circuit or unlimited number of FCUs fused to 13A.
What is the purpose of a fused spur?
In all cases the reason for fused spur is to add extra sockets for an Standard to install in a minimal decor disruptive way. I hope the above is clear. Any guidance appreciated. A fused spur can be added as part of the ring or it can be a spur of a socket that is part of the main ring that is not spurred from already.
How to install a fused spur wiring?
How To Install A Fused Spur Fused spurs can switched or unswitched and are fitted with a fuse to protect the circuit. Connect the cables as in the diagram ensuring that the load cable is connected to the appliance in use. Fused Spur Wiring Diagram
What is a spur on a final circuit?
‘Spurs’ are parts of a ‘Final Circuit’ that aren’t part of the normal make-up of that circuit, and are sometimes fused. It really isn’t rocket science, and you don’t need the regs to tell you this.. So, fused or not, if it’s coming off a RFC, and not part of the ‘ring’, it’s a spur!
