cable of choice?

[bramboy]

What cable do you guys use from inverter to consumer unit on internal and external dressed drops. Also is it correct that the c.p.c needs to be the same c.s.a. as the line conductor. Thanks

 

[JulianC]

AC cabling requirements are for a volt drop of 1% (or as close to that as possible). Therefore on domestic jobs so far I use 4mm T+E internally or 4mm SWA externally (apart from a bit of flex between SMA Sunnyboy inverters and the adjacent isolator, which might be 2.5mm depending on the plug size fitted to the inverter). There are times when 2.5mm would probably do, but I keep 4mm on the van. Not had the need to go larger yet. No need for cpc to be the same csa as line - other than the stricter volt drop limits, the AC wiring requirements are no different to any other AC circuit.