mike2016 Posted September 16, 2019 Share Posted September 16, 2019 So, the PV installers have done their thing but in the attic there's now a new hole where they poked through their DC cables (2 x strings = 4 cables). I did ask them about this and they seemed to think that the tiles take care of the water. I thought the felt was a second line of defense....? Anyway, the inverter etc isn't hooked up yet so I was wondering is this a risk? What are my options? I could create a bend with a water trap / alarm under it from the wires? I'm not sure I'd be able to pass them back outside and back in the felt overlap shown though. I could call out the installers, they were very nice otherwise but technically, on reflection, I think this approach let them down. Thoughts? Link to comment Share on other sites More sharing options...
Temp Posted September 16, 2019 Share Posted September 16, 2019 I wouldn't worry too much. Roofing felt/membrane should drape between the rafters so that it's not tight up under the tile battens. The hole doesn't look like it's at the bottom of the drape so I think it's unlikely any water will get in. Link to comment Share on other sites More sharing options...
Temp Posted September 16, 2019 Share Posted September 16, 2019 What I would check is... If water did get onto the cable would it run down the cable into the inverter or do the cables curve back up and go into the bottom of the inverter? Link to comment Share on other sites More sharing options...
SteamyTea Posted September 16, 2019 Share Posted September 16, 2019 Looks like there is a joint in the felt, why did they not thread the cable though there? Link to comment Share on other sites More sharing options...
mike2016 Posted September 16, 2019 Author Share Posted September 16, 2019 The joint is where I would have expected them to pass the cables through but they opted for a more "direct" approach shall we say....!! My exact worry is just that - if water ingressesed along the cable, it could go straight into the inverter and start a fire. The gubbins aren't yet installed so I have the option of mandating a drop in the cable before it gets wired in so at least that shouldn't happen. I still need to capture the water and lay an alarm in the bowl / whatever but it's a bit of a mess.....! Link to comment Share on other sites More sharing options...
wozza Posted September 16, 2019 Share Posted September 16, 2019 (edited) My PV cables go between the overlap in the felt, that is just lazy, it would not have taken long to thread them through. You could put a loop in the cable to stop any drips reaching anything electrical. I decided against putting my inverter in the loft, due to the high temperatures in the summer months. Even with it in the coldest room in the house (the garage) the cooling fan still operates during the summer. Edited September 16, 2019 by wozza 1 Link to comment Share on other sites More sharing options...
Cpd Posted September 16, 2019 Share Posted September 16, 2019 Ct1 / silicon like a mad man round the cable and put a drip loop in for good measure. Link to comment Share on other sites More sharing options...
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