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Electrician's instant answers by David Tuck

Posted On March 24, 2017 at 6:29 am by / Comments Off on Electrician's instant answers by David Tuck

By David Tuck

Restricted textual content with an emphasis on photographs (calculations, conversion tables, reference charts and tables) that may offer good options for on-the-job or within the workplace questions and difficulties.

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Well, there is some truth to that saying. People do forget some of their trade skills if they are not used frequently. It never hurts to brush up on the basic fundamentals of your trade. So, let’s get started. SIZING CIRCUITS Sizing circuits is necessary whether you are remodeling a building or working with new construction. A 15 amp fuse or circuit breaker can be wired with 14 gauge wire. If a 20 amp fuse or circuit breaker is 41 Copyright 2003 by The McGraw-Hill Companies, Inc. Click Here for Terms of Use.

Walkway lighting is a good example of where you might use low-voltage wiring. AUTOMATED LIGHTS Automated lights could be controlled by sensors or by timers. Motion-sensor floodlights and spotlights are good choices to deter burglars. The same lights are convenient when you pull into your driveway after dark. If outdoor lighting is connected to a homeautomation system, this part of the equation is already solved. If not, you have to decide between sensors and timers. 09a Metal halide outdoor floodlights utilizing parabolic aluminized reflectors.

Most sensors are a built-in part of the lamp holder. A photocell shuts the light down during daylight hours. Most motion-detector lights can be programmed to remain on for a set amount of time. A typical manual switch can also be used to operate a light. Other sensors can turn lights on when light levels outside fall to a certain level and turn the lights off when there is sufficient natural lighting. This type of system is often used for driveway and walkway lights. Traditional timer switches can be used to control outdoor lights.

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