Fused Connection Unit Wiring FCU How To Wire Fused Spur, 58 OFF
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Mar 10, 2016. #6. stratplus said: I am a trainee yes Andy. Been trying to get my head round rings/Spurs and radials/Spurs. I can understand if you spur off a ring that piece of cable can take potentially 26amps (two 13amp fuses). Now if you spur off that spur your current could be 52amps so overloading the cable.
Radial and ring on same breaker DIYnot Forums
Jun 29, 2010. #2. Its all down to currenty carrying capacity of the cables, for example on a 2.5 ring, the circuit protective device is 32amps. As there are 2 lots of 2.5 to every point. The reason why you can only have 1 unfused spur on a 2.5 ring is due to the fact the cable can only carry a safe max of 27amps, with 1 double socket on the end.
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The implication of the highlighted bit in your post is that the existing socket only has one cable wired into it right now, which means that it is at the end of the radial circuit, so attaching 2 more cables to feed two more sockets is actually extending the radial and adding 1 spur, which is OK. Or you could go from one new socket to the next.
Spur off a spur. Check my logic... DIYnot Forums
However, if you have a radial circuit with two cables coming in and out, this may be the last socket on that circuit and already has a spur. When looking at the rear of a socket face plate, for both ring mains and radial circuits there should be one wire coming in from the previous socket and one going out to the next, any more then this is a.
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In this video I show how to wire a spur socket to a ring final circuit using 2 methods, 1. By using a junction box and connecting into the ring circuit cable.
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fire said: ↑. You can spur of a radial and on 2.5mm2 16 amp. Technically you can't (as it isn't possible) because if 2.5mm^2 cable is already used for the existing circuit then what you have done, by definition, is not a spur. It is simply a branch of the radial final circuit. Risteard, Dec 2, 2016. #9.
Can you spur off a spur? Finnley Electrical
As with a traditional radial circuit, there is a limit as to how many outlets can be supplied and this should be checked against the IEE 16th Edition Wiring Regulations, as it differs from one installation to the next. As in section 3. (Wiring a radial circuit from a ring circuit) the radial circuit must be protected by an additional
Extending a ring main off an existing socket (not used) DIYnot Forums
Radial Socket Circuits…. Unfused spurs off a 20A radial. As many as you want using 2.5 mm sq. Unfused spurs off a 30/32 A radial. One single or one twin using 2.5 mm sq. As many as you want using 4.0 mm sq. Fused spurs - as many sockets as you want but remember the maximum 13A fuse in the spur!
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On a radial it doesn't matter if you 'spur' off a 'spur' as the circuit protection is sized for a single cable, provided you extend in the same size cable as the rest of the circuit. The former standard circuit with 20A fuse or MCB protection with 2.5 mm² live and 1.5mm² protective conductors was allowed for a floor area of not more than 50 m².
Fused Connection Unit Wiring FCU How To Wire Fused Spur, 58 OFF
Spur taken off of radial circuit with multiple sockets using a fused unit. In terms of where the spur can actually be taken from, this can be directly from an existing socket or by adding a junction box and wiring your spur from that. How to Wire a Radial Circuit. Now that you know what a radial circuit is and how they work, it's time to look.
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A spur can alternatively be connected at the consumer unit, which although might seem incorrect, is actually no different to connecting to an existing socket outlet. Socket outlet wiring. The spur socket only has a single cable, with the connections to Live, Neutral and Earth. This is exactly the same as connecting at the end of a radial circuit.
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It often happens that a customer, or even yourself, wishes to add just one more socket to a circuit.Perhaps it is to make it easier to plug in the computer w.
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In a typical radial circuit using the same cable, we would limit the circuit breaker to 16A or (at most) 20A, thus the cable is protected from an overload. If you want to have lots of sockets on a spur off a ring, you can use a fused connection unit to create the first spur from the ring.
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This is safe and compliant -but remember 13a max on all sockets. Also to add new sockets and newly buried cable requires RCD protection if not already present and protecting that part of the circuit. So configuration would be either: RCD>Ring>FCU>newly buried cable/spurred sockets. or.
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Location. Llanfair Caereinion, Nr Welshpool. Country. 15 Jan 2021. #2. A radial in 4 mm² from a 30/32 amp fuse/mcb/rcbo is the same as a ring final when taking an unfused spur, to quote:-. BS7671:2008 appendix 15 said: An unfused spur run in 2.5 mm² cable should feed one single, or one twin socket outlet only.
socket off the Spur with the FCU DIYnot Forums
The space in question is approx 6x7 metres. There will be no lighting off this circuit. I read in several threads on the topic of radial circuits (not necessarily on this forum) that, although a 32A protected circuit has to be wired in 4mm cable, "spurs" may be taken from a socket on the circuit and wired in 2.5mm cable.
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