This specification covers shielded and unshielded electrical power cable for use on hightension ignition systems.Intended Use: The cable covered by this specification is intended for use on ignition systems of internal combustion engines for aircraft, automotive vehicles, marine vehicles and applications, and portable power service equipment. Retention of this specification as a detail specification is required due to the use of a Qualified Products List (QPL) for acquiring and procuring these cables. Unshielded. Unshielded cable is intended for use in high-tension ignition systems and requires the use of shielding or other methods for radio-interference suppression.  Shielded. Shielded cable is intended for use where shielding of individual cables for radio interference is required.