A. providing protection against surges
B. providing emergency earth routes
C. supporting the pole
D. all of the above
Answer: C. supporting the pole
Explanation:
- Guy wire or extended cable is needed on some poles to support unbalanced lateral loads due to the utility wires attached to them or to resist ground movement.
- Guy wire or extended cable is particularly needed on dead-end (anchor) poles, where a long straight section of wireline ends, or angles off in another direction and hence prevent the pole from bending.
- To protect the public against faults that might allow the extended cable to become electrified, utility guy cables usually either have a ceramic strain insulator ("Johnny ball"), or a fiberglass guy strain insulator inserted near the top.
- To ensure that any dangerous voltages do not reach the lower end of the wire accessible to the public. The lower end where the cable enters the ground is often encased in a length of the yellow plastic reflector to make it more visible so that people or vehicles do not run into it.