Given how many decades supply cables have to last, I would expect the steel wire armour to have disintegrated into rust long before the cables get replaced.
It would be better to use 5 core 3P+N+E, and only use the wire for protection.
Given how many decades supply cables have to last, I would expect the steel wire armour to have disintegrated into rust long before the cables get replaced.
It would be better to use 5 core 3P+N+E, and only use the wire for protection.