Protecting cables against external factors

[Ken77]

Hi,

Whilst it is not best practise, is there any harm in a 10mm G&Y cable running along the outside of a building. The cable is currently tied to existing conduit, (there is no space in the conduit to run additional cable) and is unlikely to encounter any impact in its location. So the only possible concern I can see if that of damage from the elements, however as the cable is on the shaded part of the house, direct sunlight is not an issue, which only leaves temperature. Installing additional conduit in which to house the cable is not doing to safeguard against this? As a guess range of temp is between -5C at to 35C.
Does action need to be taken?

 

[QSGAZ]

A cable run outside should have machanical protection either by getting your cable in some new conduit, getting bigger conduit and putting all cables in or run SWA but at 10MM this might be the most expensice idea.

 

[malcolmsanford]

apart from a morbid hatred of T + E clipped direct outside, as you seem to have done a pretty fair risk assessment then no I can't see anything wrong with it.

Being ties to the conduit is dirt rough to leave and I personally would argue your not adhering to regulation 522.8.3.

Could you fit a piece of decent mini trunking to run it in, or even change it for singles or even strip it down, and try and get into the conduit. Must be better ways to achieve installation

 

[Andy78]

The OP states its a G/Y cable so I'm assuming it's not T+E. I would however assume the same degree of protection would be desirable as has been described in the above posts. What is the function of this cable ?

 

[Ken77]

Hi Malcolm,

Thanks for the response, and I was hoping someone could verify this was ok. I agree with the you that cable clipped direct is abit of an eye sore. Unfortunately mini trunking wouldn't work because of saddle brackets used to hold 20mm conduit up would create obstruction. So new conduit looks like only answer to it. With regards to 522.8.3 there does not appear to be any stress on the cable due to radius of the bends, in this case.

 

[Ken77]

Bonding to Water pipes