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The idea of working on electrical projects may give you some minor feeling of panic, but many typical household dilemmas are simple to repair as long as you obey the rules of currents and always follow safety guidelines. Every person in your household who is old enough should know how to turn off and restore your home’s power supply in case of power failure or to make electrical repairs. It will seem obvious to state that you should never work on anything electrical that is conductive, or live, without first disabling it, but let’s face it, even the best of us get lazy once in awhile.
Few people realize that it is necessary to disable the power supply before you drill into ceilings or walls—you may hit a wire without knowing it, so shut off power at your circuit box before you drill. Keep a flashlight near your breaker box so you can see what you’re doing. Older homes tend to have fuse boxes, while newer or refurbished ones have circuit breakers, but they serve the same function. If you have a fuse box, keep the appropriate fuses on hand and never use fuses that are too powerful for your fuse box. The amp ratings should be clearly marked inside the box door.
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Ranking third among the U.S. states in area, California has a diverse topography and climate. A series of low mountains known as the Coast Ranges extends along the 1,200-mi (1,930-km) coast. The region from Point Arena, N of San Francisco, to the southern part of the state is subject to tremors and sometimes to severe earthquakes caused by tectonic stress along the San Andreas fault. The Coast Ranges receive heavy rainfall in the north, where the giant cathedrallike redwood forests prevail, but the climate of these mountains is considerably drier in S California, and S of the Golden Gate no major rivers reach the ocean. Behind the coastal ranges in central California lies the great Central Valley, a long alluvial valley drained by the Sacramento and San Joaquin rivers. In the southeast lie vast wastelands, notably the Mojave Desert, site of Joshua Tree National Park
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