Fused spur location

[joinerjoe]

I have a question regarding a 13 amp fused spur of a radial circuit that is spured from the 32 amp mcb of the final ring circuit. Can the fused spur be located at an accessible point in the loft rather than the bedroom. Is this permissible or does it need to be accessible in the room?

 

[EFLImpudence]

A spur, fused or not, is a branch from another circuit.

If you mean the spur runs directly from the 32A MCB in the CU, then, yes, the Fused Connection Unit may be anywhere on the spur as long as it is in a position to protect everything it should.

 

[Taylortwocities]

There are two types of circuit that originate from a consumer unit
Ring or
Radial

You cannot have a “radial circuit that is spured from a final ring circuit”

If it is a single cable that connects to the MCB that is also where the ring final connects then it is a spur and can only go to ONE place.

You don’t want the FCU in the loft. Put it next to the consumer unit.

 

[Harry Bloomfield]

I have a question regarding a 13 amp fused spur of a radial circuit that is spured from the 32 amp mcb of the final ring circuit.

A fused spur to supply what exactly?

 

[Taylortwocities]

What is already connected to this spur?

 

[joinerjoe]

I'm adding two sockets to a bungalow bedroom, because of the way the ring is routed and the loft being boarded, could turn into a bigger job than it needs to be. As there is an existing redundant 2.5mm radial from the CU to a junction in the loft I intend using it. I don't really want two mcb's for the sockets (though it would be easier), I intend moving the existing radial from the 20 amp mcb to the 32 amp final ring circuit mcb. I would prefer the fused spur to be positioned in the loft because the two sockets will be positioned on either side of the bed at a height above the bedside cabinets.

Hope this makes thing clear.

 

[RandomGrinch]

I intend moving the existing radial from the 20 amp mcb

Why don't you keep it simple; just add your sockets to the 20A radial - no need for FCUs?
20A is a decent amount of supply for most uses. If you do get nuisance trips, you can always get more complicated later!

 

[EFLImpudence]

As there is an existing redundant 2.5mm radial from the CU to a junction in the loft I intend using it.

Ok - so it sounds just right as it is.

I don't really want two mcb's for the sockets (though it would be easier),

Why not? It is totally unimportant - and could indeed be advantageous.

I intend moving the existing radial from the 20 amp mcb to the 32 amp final ring circuit mcb. ]

Why? It is just right as it is.

I would prefer the fused spur to be positioned in the loft

You do not need a Fused Connector Unit. A spur is a branch from a circuit.

because the two sockets will be positioned on either side of the bed at a height above the bedside cabinets.

That is not a valid reason for an unnecessary accessory.

 

[sparkwright]

.

 

[SUNRAY]

Making changes in the CU is a notifiable job.

Moving the existing cable is unnecessary creation of work, changing the existing junction box to a fused connexion unit is an unnecessary expense and all for no advantage.

 

[Taylortwocities]

@SUNRAY

Whssign

• Taylortwocities
• 16 Jul 2016

What he said

.........................................................

 

[joinerjoe]

Thanks for all your replies, it's appreciated.
I fully understand your points, the fact that I would be creating unnecessary work etc, so decided to take your advice and just go with the radial option. The only reason that I was considering the other was to avoid having two mcb’s for the sockets where potentially someone (in the future) may perhaps switch off the ring not realising the two bedside sockets were still live. Will label the radial ‘Bedside Sockets’.

 

[SUNRAY]

My 1965 home started out as a single ring with only 3 or 4 sockets and multiple spurs, many of which incorrectly had several sockets.
When I rewired (actually reconfigured retaining much of the existing cable) I created 2 rings and 5 radials, 3 of which are in the same rooms as rings.

 

[joinerjoe]

My 1965 home started out as a single ring with only 3 or 4 sockets and multiple spurs, many of which incorrectly had several sockets.
When I rewired (actually reconfigured retaining much of the existing cable) I created 2 rings and 5 radials, 3 of which are in the same rooms as rings.

Thanks. Reassuring to know that.
This property is 1970’s previously owned by a qualified electrician. In the time of my ownership have uncovered many bad electrical installations. In the kitchen, the oven and hob were wired to a suspended in ‘mid air’ junction, spurs on spurs with no fused spurs, the CU unit wire up incorrectly, and cables routed outside the correct zones; unbelievable really. I suspect that many of these are due to kitchen and bedroom installers but being qualified, I would have thought that he would have noticed or checked.