Cable from loft to CU

[Dale200bhp]

I would just put a steel 25mm conduit with endbox behind consumer unit straight up into the loft in the corner if you can (im asumeing con unit would be in a corner), then you can pull in what you want at later date.

On the timber frame houses we do we stick a 25mm plastic conduit straight to loft for solar at later date, and its behind the stud work so it will be 125mm back from the surface too.

I would advise however to install inverter else where, im not keen on installing them in lofts although many do.

 

[moggy1968]

SWA may not be regarded as sufficient protection against nails and the like if burried in a wall less than 50mm. neither is metal capping.

 

[moggy1968]

No, you're right Gavin, never on a shared RCD. Most TL manufacturers will tell you that their unit exhibits about 20mA AC leakage under normal operating conditions. Odd though, that SMA "recommend" a 100mA min trip limit (to avoid nuisance tripping) and I could be mistaken but didn't P1 always recommend a 300mA trip limit, per inverter - although that could be due to the fact that most of mainland Europe (especially Germany curiously) don't consider a 100mA trip limit RCD as a standard rating, normally using either 30mA or 300mA.

So, we know in practice that a 30mA limit on a dedicated circuit is generally ok with a good quality TL unit (damp mornings are when a problem will typically materialise as we know) but on the other hand we have manufacturer's recommendations to follow....what to do? ;-)

which is why I didn't understand your previous post! Hence Huh!