Section 705 for agricultural installations

[Gavin A]

from sma guidence only 3 inverters can be fitted on a 300ma type a rcd due to 90ma leakage from each inverter hence thats why the requirement for the four rcds ie 10 inverters .section 705 all circuits no more than 330ma on farms and nic guidence

fair enough, I don't think I've ever done more than 3 tripowers on a circuit, so I've learned something today, thanks.

eta - I've worked out where I went wrong there as well, thinking the earth leakage would be split across the 3 phases, but effectively the reverse is true.

 

[reelectrics]

At design stage but curious which method other installers are complying with regs and rcd issues on ground mount systems .