I am updating a garage submain for a customer. Its on a 35m overhead cable, supported by a broken catenary wire shared with the neighbour. My customer want's their own independent support wire. This means there will be two catenary wires running in parallel. I assume there is some risk of chafing in high winds if the wires are very close, how do I calculate a suitable separation distance. In terms of installation complexity the closer I can get them the easier it is for me.
