I am using 3 core SWA to take power to a garage. The SWA is buried underground between the house and garage and I am joining it to T+E inside the house as it is easier to manipulate.
I was planning on using the 3rd core in the SWA as the earth for the garage. Does the SWA armour need earthing in this case or is merely used as a physical protection for the cable.
Cheers
Martin