CFR /  Title 30  /  Part 77  /  Sec. 77.602 Permanent splicing of trailing cables.

When permanent splices in trailing cables are made, they shall be:

(a) Mechanically strong with adequate electrical conductivity;

(b) Effectively insulated and sealed so as to exclude moisture; and,

(c) Vulcanized or otherwise made with suitable materials to provide good bonding to the outer jacket.