opinions please?

[SibertSolar]

Ok, need to bounce ideas about if poss....

Existing building with 3ph TT supply (100mA RCD, non -S type), feeds another building 300m away with a 3ph sub DB (no RCD) where my customer is looking to fit a 50kWp PV feed to.

We're waiting on Ze values on the incomer. I have no other info at the moment.

Thoughts/concerns with feeding the PV into the sub DB?

 

[Gavin A]

all depends on the CSA of the cable feeding the sub db, if that's ok for a 300m run then go for it, but maybe up the RCD to 300mA if that's ok for all other reasons.

 

[SibertSolar]

Thanks Gavin, certainly looking to increase main RCD to 300mA if possible. Difficult to avoid sharing the main RCD in this scenario though...

 

[Gavin A]

Thanks Gavin, certainly looking to increase main RCD to 300mA if possible. Difficult to avoid sharing the main RCD in this scenario though...

yeah, no real problem with it though in this scenario.

 

[SibertSolar]

That's what I was thinking but wasn't 100%, thanks