The messenger of messenger-supported wiring shall be supported at dead ends and at intermediate locations so as to eliminate _____ on the circuit conductors.
See answer and applicable Code reference
The correct answer is: c) tension
Article 396 covers the use, installation, and construction specifications for messenger-supported wiring. As per 396.30(A), "The messenger shall be supported at dead ends and at intermediate locations so as to eliminate tension on the conductors. The conductors shall not be permitted to come in contact with the messenger supports or any structural members, walls, or pipes."