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Line and neutral split ?
Line and neutral split ?
Have not noticed this before
- Thread starter studentspark
- Start date
The larger cable on the right is line and neutral supply, and the smaller cable on the left is a looped supply. It probably feeds next door.
Whats the earthing arrangement there? I can see that central stud you always got on old Eastern Electricity supply positions so I'd assume TN-S but can't see where/if its connected to the sheath/head.
You can just see it coming of right hand cable, disappears behind fuse wire packet and tucked under mounting board.
So only one of the cables has an earth conductor sweated to it?
If the other one goes next door, how does their installation get an earth?
PLUS:
Is that earth conductor properly connected to that stud? Looks like it's just loosely wrapped around it.
What else is connected to it? I can see what looks like 1 white core from a phone cable heading off in a 2 o-clock direction (which again looks like it's just draped around the stud), and a G/Y sleeve with at best one steel strand in it going down and then up behind the board
If the other one goes next door, how does their installation get an earth?
PLUS:
Is that earth conductor properly connected to that stud? Looks like it's just loosely wrapped around it.
What else is connected to it? I can see what looks like 1 white core from a phone cable heading off in a 2 o-clock direction (which again looks like it's just draped around the stud), and a G/Y sleeve with at best one steel strand in it going down and then up behind the board
Just been looking at this photo again, and I am a bit confused.
RF you say this is the looped supply, but the CSA of the left cable appears so small.
I am unsure how this can be looped.
Have you a photo of this type of head with the cover off.
BAS
Its an unoccupied flat that is to be rewired as it is VIR throughout. Apart from that bit of PVC which is a recent addition for a hall socket
RF you say this is the looped supply, but the CSA of the left cable appears so small.
I am unsure how this can be looped.
Have you a photo of this type of head with the cover off.
BAS
Its an unoccupied flat that is to be rewired as it is VIR throughout. Apart from that bit of PVC which is a recent addition for a hall socket
Remember the outgoing cable is only 2 cores. I don't have a pic of a looped supply fed in PILC as the cutouts are normally pitch filled.
Here's one fed in split con.
Here's one fed in split con.
OK i see that,m the CSA of the loped supply is smaller.
But I thought the supply cable was only 2 core anyway, and the sheath supplied the earth.
Thanks for your time
But I thought the supply cable was only 2 core anyway, and the sheath supplied the earth.
Thanks for your time
It will be a two core feeder.
Have you ever seen a cross section of a PILC? The actual cable isn't all that big once you've removed all the steel and tar cloth etc.
Have you ever seen a cross section of a PILC? The actual cable isn't all that big once you've removed all the steel and tar cloth etc.
No. but I have often wondered why 25mm tails are the norm, when the supply seems so smaller.
Weakest link in the chain and all that
Weakest link in the chain and all that
It's because people, for some reason, take more notice of misguided guides, which are written for no reason, than the actual regulations.
Common combinations I've seen would be a 2c .04 with a 2c .0225 loop, or a 2c .0225 with a 2c .0148 loop.
As you say why use 25mm2 tails except with the 2c .04, having said that the 2c .0225 is rated at over 100A
As you say why use 25mm2 tails except with the 2c .04, having said that the 2c .0225 is rated at over 100A
What's the CCC for 16.0mm² conductors in BS7671?
Slightly drifting but I suspect 25mm2 is generally used to avoid the need to start having to find out the size of the supply cable
87A.
My point is that the OSG flatly states that the minimum size should be 25mm² therefore 'everbody' advocates replacement whether needed or not.
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