fused spar

[everton2005]

hi all i have a fused spur running a security light i would like to connnect a single switch to it to run 2 outside lights wouild this be okay

 

[PrenticeBoyofDerry]

You have a fused spur that is connected to a security light, so you now want to add to the spurred circuit an additional two lights to be operated by a single switch, is that correct?
Does this fused spur have a switch on it to operate/isolate existing security light or does this light already have a switch to operate it?

 

[everton2005]

the fuse spur has a switch the light itself doesnt thanks

 

[riveralt]

hi all i have a fused spur running a security light i would like to connnect a single switch to it to run 2 outside lights wouild this be okay

It's not clear what you want to do nor indeed what you currently have.
I take it you have some form of 3Amp (switched??) fused spur taken from a ring final circuit (socket circuit) and you wish to use this to power two additional outside lights.
Does the outside light work via a PIR? Or is it operated from the switched fused spur?
How do the additional outside lights work (PIR??) or directly via a switch?
Do you want all three lights to operate from a single switch or are the two new lights to operate independently of the 'security light'?

 

[everton2005]

the security light is a pir and the 2 new lights are normal not pir and would be required to run off a new switch thanks

 

[riveralt]

Okay the problem you will have is that if you wire it separately from the current fcu you have to connect the new cable into the supply side of the current fcu - thereby bypassing the fuse.

So if you take that approach you will need to include a second switched 3Amp fcu in the cable run to the new lights.
The are other options.

You haven't said where the power is coming from but if it is the ring final circuit then the cable from the current fcu to the new fcu will need to be at least T&E 2.5mm2

 

[everton2005]

so rather than just take a feed from the fused spur i need to take a feed from the fused spur to another fused spur then onto the switch for the lights thanks

 

[sparkwright]

It's not totally clear what you are doing, but if the switched FCU is feeding a security light presumably it will be rare that the switch will ever be OFF.

So why not take a feed from the LOAD side of the FCU to the new switch and new lights.

 

[everton2005]

thats correct the the fused spur is never turned off

 

[riveralt]

so rather than just take a feed from the fused spur i need to take a feed from the fused spur to another fused spur then onto the switch for the lights thanks

Firstly - you haven't said but I assume the spur is from a ring final circuit.
If it isn't then let me know.
I said there are other options.
Technically you are not allowed to have more than one spur from each socket unless you introduce an fcu into the circuit - then you can have as many as you want.
You will be aware that an FCU has a supply side and a load side.
The current fcu has live power to the supply side through a fuse and onto the switch live and the light.
You could place the new cable to the new lights on the load side and let the switched fcu also act as the switch for the new lights thereby eliminating the need for a second switched fcu. But this will mean that the PIR operated light will not operate unless the fcu is switched on - thereby the new lights will be permanently on.

Hence my suggestion of a second switched fcu.

 

[everton2005]

thanks for the advice so the best way is a second switched fcu to avoid the new lights being on all the time and allowing the pir security light to operate properly

 

[riveralt]

thanks for the advice so the best way is a second switched fcu to avoid the new lights being on all the time and allowing the pir security light to operate properly

Yes but as I said there are other options.
You could replace the switched fcu with non switched and run both sets of lights from the load side of the fcu (thereby fusing down both lights) to their own individual light switches.
Or you could replace the switched fcu with a non switched and run both sets of lights from the load side of the fcu (thereby fusing down both lights) and run the PIR lights direct and the new second lights through a normal switch.

 

[everton2005]

thanks for the advice it is much appreciated

 

[PrenticeBoyofDerry]

You could just feed two switches or double gang from the FCU one for existing light and one for the new ones!

 

[everton2005]

could i just do away with the fcu and replace it with a double switch