Chapter 30

1. The electrical cable that carries power from the main circuit breaker panel to the first electrical box, plug, or switch in the circuit.
4. The process of ensuring workers on construction sites are fully informed about the organisation and operation of the site and of their responsibilities.
6. An apparatus for reducing or increasing the voltage of an alternating current.
8. An electrical outlet.
9. An electric current that reverses its direction many times a second at regular intervals, typically used in power supplies.
11. A branch circuit is defined as that part of an electric circuit extending beyond the last circuit breaker or fuse.
13. A mechanical structure that uses power to apply forces and control movement to perform an intended action.
14. A device for making and breaking the connection in an electric circuit.
15. Switchboard for all the electricity in a home.

2. A regionally adoptable standard for the safe installation of electrical wiring and equipment in the United States.
3. An automatic device for stopping the flow of current in an electric circuit as a safety measure.
5. A whole-house network of audio, video, data, telephone, television, home automation or security signals.
7. A roughly circular line, route, or movement that starts and finishes at the same place.
10. A tool used by electricians to route new wiring through walls and electrical conduit.
12. A pipe used to protect wiring or another venerable construction product or component.