Final answer:
Potential hazards while drilling and fishing wire include electrical conduits, gas pipelines, and water pipes, which could lead to shock or thermal hazards and gas leaks.
Step-by-step explanation:
When drilling and fishing wire, potential hazards can include electrical conduits, gas pipelines, and water pipes. These objects could be accidentally drilled into, causing electrical shock or thermal hazards, gas leaks, or water damage. It is crucial to identify the location of these items before beginning work to avoid any accidents. Wooden beams do not pose the same kind of risk for shock or thermal hazards but could be a structural concern if compromised.