PV Cable size.

[MartynS]

Hi All
House been rewired and want to futurise for PV panel.
What cable size is required back to consumer unit?
Thks
Martyn

 

[Leesparkykent]

Hi All
House been rewired and want to futurise for PV panel.
What cable size is required back to consumer unit?
Thks
Martyn

Aim for below 1% volt drop and some manufacturers will specify a minimum CSA.

 

[Steve93]

We usually use 4mm domestic.

 

[MartynS]

Thks Steve93. 4mm2 Twin+Earth then.
Would 6mmT&E be over the top?
Martyn

 

[whinmoor]

No - 6mm is not excessive. Go for it. The cost difference is peanuts in the greater scheme of things and you're less likely to suffer VD problems with thicker cable.

 

[Steve93]

As whinmoor said 6mm makes it no different especially if you already have that cable to use.

 

[Octopus]

and don't think about connecting it to a "shared" RCD.

 

[saint]

Use SWA then no RCD required