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Posted

Hello all 

 

I've got some 2.5mm t+e coming out of the side of the house (near the top of the wall) through some fibre cement cladding.  the wires will go eventually to a junction box  and then via conduit into a sewage pump.  

 

I've seen that there are metal junction boxes that are rear entry but I don't see the same in the plastics range.  Are they available?  or are there other solutions for making things nice and weatherproof from the wall to a junction box?  

 

thanks

justin

 

 

 

Posted

You can get plain plastic boxes or ones with preset hole positions in the back and sides. Usually for 20 or 25mm dia holes.

 

You'll usually find the appropriate hole saw (with the pilot removed) will engage/line up with the presets so as not to slip:

 

Screenshot_20250131-184003(1).thumb.png.28eb63805eb8984ca2563642a5ae0e3c.png

 

Screenshot_20250131-184019(1).thumb.png.9bb04cf3d1d432860f5eec63c29100d8.png

  • Like 1
Posted
4 hours ago, Pocster said:

What do I do if my hole is much bigger ??

 

As much as I detest lowering myself to your level I can't resist. 

 

A "sleeve" I believe is the answer. 

  • Thanks 1
Posted
On 31/01/2025 at 17:31, ProDave said:

Plastic boxes you just drill your own entry hole where required.

Thanks @ProDave I had considered that but was passingly concerned at whether that would reduce the IP rating of the box and it's structural integrity.  

 

Is the IP rating maintained by siliconing the top of the box to the cladding?  

Posted
11 hours ago, jpadie said:

Thanks @ProDave I had considered that but was passingly concerned at whether that would reduce the IP rating of the box and it's structural integrity.  

 

Is the IP rating maintained by siliconing the top of the box to the cladding?  

 

You might be better siliconing a U shape on the rear of the box as in top and sides or if all sides a little gap at the bottom. 

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