Better to know some light words

Glossary of electrical terms
Ampere (or amp)	is the measure of the rate of flow of electricity -- comparable to flow of water through a hose. Branch circuits, fuses and circuit breakers are rated in amperes to indicate the amount of electricity they can carry safely.
Circuit Breakers and Fuses	are safety devices that automatically cut the flow of electricity when a circuit is overloaded. In the fuse, an element melts when overloaded, stopping the flow. In the circuit breaker, a switch is tripped when it is overloaded. Once the cause of the overload has been corrected, the fuse must be replaced. The circuit breaker can simply be reset after the cause of the overload has been corrected. Circuit breakers and fuses are preset to appropriate amperage ratings, and it is important for the safety of your home or business that the amperage ratings in the main service panel be observed.
Electric Service Entrance	normally consists of wires enclosed in conduit, a proper ground, your electric meter base and the main service panel -- in other words, essentially the entire apparatus that is necessary to safely take electricity into your home.
Main Service Panel	is a metal box that houses the circuit breakers or fuses. The main service panel serves as the point from which the electricity is distributed to branch circuits throughout your home for appliance, equipment and lighting outlets.
Peak Demand	is the highest requirement that CESC can be expected to experience. To a large extent, peak demand determines how much generating capacity must be in place to serve our consumers.
Volt	is a measure of electric force. The volt is the force behind the current, or amps, flowing through a wire. Just as the amp can be compared to the amount of water flowing through a hose, the volt can be compared to the amount of pressure that is pushing that water.
Watt	is a unit of power that does work electrically. Mathematically, the watt is the product of amperes times volts.
Watt-hour	is the measurement of electrical energy used -- measured as one watt of electricity used for one hour.
Kilowatt-hour	is 1,000 watt-hours, abbreviated "kwh." On electric bills, this indicates the amount of electric energy used. A 100-watt lamp operated for 10 hours (100 watts x 10 hours) uses 1,000 watt-hours -- or 1 kwh.