Extending an electrical cable in mortar

[PS1964]

I have a light either side of my front door and they are fed by two standard 3 core grey insulated lighting cables.
The problem is that the cables aren't symmetrical to the door so one cable needs to be longer so each light is the same distance from the door frame.
Is it possible to extend one of the cables using something like inline splices and self amalgamating tape? This might involve chiselling out some of the mortar, extending the cable using the aforementioned items, burying the cable in the gap where the mortar was, and then mortaring over the spliced cable.
This might sound horrific but I was trying to avoid using junction boxes which sort of spoil the desired effect.

 

[bright_Spark]

If you are going along with the bricks in a zig zag pattern, certainly not

 

[PS1964]

If you are going along with the bricks in a zig zag pattern, certainly not

No it's a straight line, just to extend one of the cables

 

[bright_Spark]

Rough but yes if it is in line with the light below it. Personaly I would look at replacing the cables and doing it properly. You are not supposed to use normal cable outdoors clipped to a wall as it suffers from UV and will rot the insulation off eventually.

 

[PS1964]

Rough but yes if it is in line with the light below it. Personaly I would look at replacing the cables and doing it properly.

I'd love to replace the cables but it's a new build house, the cables are in the wall and the mess and upheaval prohibits replacement tbh

 

[bright_Spark]

I'd love to replace the cables but it's a new build house, the cables are in the wall and the mess and upheaval prohibits replacement tbh

ah ok got you

 

[PS1964]

Rough but yes if it is in line with the light below it. Personaly I would look at replacing the cables and doing it properly. You are not supposed to use normal cable outdoors clipped to a wall as it suffers from UV and will rot the insulation off eventually.

The cables won't be clipped to a wall as my proposal is to lengthen the cable using waterproof heat shrink splices, chisel out some render in a straight line, and then to bury the cables in fresh replacement mortar

 

[bright_Spark]

The cables won't be clipped to a wall as my proposal is to lengthen the cable using waterproof heat shrink splices, chisel out some render in a straight line, and then to bury the cables in fresh replacement mortar

yes will be ok

 

[Bazza]

Send us a pic of the layout. One of the brighter sparks may have a solution...

 

[MGW]

Using mineral insulated cables the cables can be completely hidden, but this is not a DIY job. So the question is how much are hidden cables worth?

I am not likely to install mineral insulated cables, as only done it as a collage exercise. And running cables inside house is likely easier.

However why join cables? Would it not be easier to just fit a longer one? OK with a 100 meter run, using a epoxy shrink, or resin joint may make sense, but under 10 meters just renew whole cable, cable joints are too expensive.

 

[bright_Spark]

Send us a pic of the layout. One of the brighter sparks may have a solution...

very doubtful

 

[malbec4]

Here's one of our finest members showing off his thespian quality. 19 seconds in.