A. sheath loss
B. copper loss
C. iron loss
D. none of the above
Answer: A. sheath loss
Explanation:
Bonding is the electro-mechanical joining of two or more conductors, to form a conductive path that ensures electrical continuity.
A cable not properly grounded can have a high electric potential when compared to the utility ground in a house.
Bonding is used to reduce the risk of electric shocks to anyone who may touch two separate metal parts when there is a fault somewhere in the supply of electrical installation.
By connecting bonding conductors between particular parts, it reduces the voltage there might have been.
In case of AC power cables due to the magnetic flux produced by the currents, induces voltages on sheath materials between the adjacent cable sheaths and due to this potential difference arcing will be developed which causes damages to the sheath.
To reduce sheath losses and internal inductances and increase the resistance of the cable, bonding is done at both ends of the cable.
Along with the bonding transposition is also used in 3-phase cable for reducing sheath losses and maintain uniform voltage.