- Reaction score
- 679
One question i have had puzzling me for a while is if you use 2 core swa for a supply to a remote building with extraneous conductive parts and the armour is earthed at the supply end only (remote end made tt) and the cable is damaged towards the remote end ie fork through armour to phase conductor do we need to check the Zs phase to armour to ensure the protection will operate in the required time? long winded I know but do we need to ensure only volt drop and current carrying capacity are adequate for the cable and ignore R2 armour values????