swa used for dc strings...armour need earthig ?

[mjlelec]

Hi everyone, I'm new to this forum and hoping someone might be able help me. Just looking to do a 50 kw install on a comercial flat roof with each dc string wired in 2 core xlpe swa. The swa will run from each dc isolator at inverter position to a joint box at the middle of each string then change to solar flex via mc4,s onto the panels.

My question is does the armouring have to be earthed as would be normal practice with ac ? Many thanks

 

[Graeme Harrold]

Think you need to read up on cable regs.....