Electricity aperture

keithdc

Hi, 
Our garage has a concrete floor- the mains electricity comes through the garage floor, but the hole is rather big compared to the cable- probably a semi-circle with 4" circumference. 
We don't currently have any pests, but are concerned this might be a route of entry (or a nice little house for them). Is there anything that people can suggest to fill in the hole or block it off? Happy for it to be temporary/ movable if better from electricity perspective. 

Risteard

I'm presuming it's in a duct. You can get cable duct seals to seal from fire/water/gas etc. They're not cheap, however, and should really be done by someone competent.

TELLIT01

You could use expanding foam to fill it.  The will stop livestock entering but will be comparatively easy to remove as long as you don't use too much.

Risteard

TELLIT01 said:

You could use expanding foam to fill it.  The will stop livestock entering but will be comparatively easy to remove as long as you don't use too much.

Not advisable.

keithdc

Thanks- not sure how well I have described it- will try and do picture later. 
I don't think expanding foam would be a good plan- it would be very tricky to remove.

grumbler

keithdc said:

I don't think expanding foam would be a good plan- it would be very tricky to remove.

Quite the opposite - very easy.

I can suggest mortar with very low cement content and not very deep, something like 1:10 and 2 cm. Fill the hole with sand if it's deeper. It will be very easy to remove too.

Risteard

keithdc said:

Thanks- not sure how well I have described it- will try and do picture later. 
I don't think expanding foam would be a good plan- it would be very tricky to remove.

My bigger concern would be with the potential to react with the cables (although this probably shouldn't be the case with most types of expanding foam) and also heat dissipation.

As I say, there are actual products to seal ducts which should be used. They are designed solely for this purpose.

keithdc

Hi, 
Sorry- I have now pictures, which have reminded me there are two gaps. 
The top picture is the main electricity cable- the gap is probably about 4 inches across and not very deep. 

The bottom picture has a green/ yellow cable going in to ground- probably 2 inches deep and 6 inches across. In the picture, you can see an arrow- next to it someone has written on wall that need trapdoor for hole. 

Thank you.