Across
- 3. is a device intended for the protection of personnel that functions to de-energize a circuit or portion thereof within an established period of time when a current to ground exceeds some predetermined value that is less than that required to operate the overcurrent protective device of the supply circuit.
- 5. A semiconductor device with three connections, capable of amplification in addition to rectification.
- 6. An electronic switching device that switches on or off when a small external voltage is applied across its control terminals. The switching action happens extremely fast.
- 8. Measures the current flow in amperes in a circuit.
- 10. Any material where an electric current does not flow freely. Insulating materials, such as glass, rubber, air, and many plastics have relatively high resistance. Insulators protect equipment and life from electric shock.
- 14. A passive two-terminal electrical component used to store electrical energy temporarily in an electric field.
- 15. Any material where electric current can flow freely. Conductive materials, such as metals, have relatively low resistance. Copper and aluminum wire are the most common conductors used in the electrical trade.
- 16. A spiral of conducting wire, would so that when an electric current passes through it, its turns are nearly equivalent to a succession of parallel circuits, and it acquires magnetic properties similar to those of a bar magnet.
- 17. An apparatus that converts direct current into alternating current.
- 18. The combination of electrical disconnect switches, fuses or circuit breakers used to control, protect, and isolate electrical equipment. Switchgear is used both to de-energize equipment to allow work to be done and to clear faults downstream.
- 19. A solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits.
Down
- 1. is a special type of receptacle or circuit breaker that opens the circuit when it detects a dangerous electrical arc. It’s used to prevent electrical fires.
- 2. A closed path in which electrons from a voltage or current source flow. Circuits can be in series, parallel, or in any combination of the two.
- 4. is an electronic measurement tool that can measure voltage, current, resistance, capacitance, temperature, frequency.
- 7. The conductors and equipment used to deliver energy from the electrical supply system to the system being served.
- 9. A device that converts mechanical energy to electrical energy for use in an external circuit. The source of mechanical energy may vary widely from a hand crank to an internal combustion engine. Generators provide nearly all of the power for electric power grids.
- 11. An automatic device for stopping the flow of current in an electric circuit. To restore service, the circuit breaker must be reset (closed) after correcting the cause of the overload or failure.
- 12. is a semiconductor device with two terminals, typically allowing the flow of current in one direction only.
- 13. The underground service conductors between the street main – including risers – and the first point of connection to the service-entrance conductors in a terminal box (also known as a junction box), meter, or other enclosure.
- 18. A switch is a device for making, breaking, or changing the connections in an electric current.