By Morgane Seraphine. Electrical Wiring. Publised at Monday, December 04th 2017, 00:59:18 AM. “Anywhere there is the chance of contact with water or the ground, there should be a GFCI,” says Brett Brenner, president of the Electrical Safety Foundation International (ESFI). “It’s estimated that GFCIs accounted for roughly a 70 percent reduction in electrocutions,” he says. GFCIs are also available as circuit breakers installed in the panel, giving ground fault protection to designated circuits in the home.
By Elvire Fernande. Electrical Wiring. Published at Tuesday, March 20th 2018, 21:47:16 PM. High voltage transmission lines carry electricity long distances to asubstation. From this substation, electricity in different power levels is used to runfactories, streetcars and mass transit, light street lights and stop light, and is sent toneighborhood. When electricity enters "example house", it must pass through a meter andgoes through a fuse box. The fuse box protects the house in case of problems. When afuse "circuit breaker" ³blows´ or ³trips´ something wrong with an appliance or somethingwas short circuited.
By Morgane Seraphine. Electrical Wiring. Published at Tuesday, March 20th 2018, 21:06:30 PM. The National Electrical Code (NEC) dictates that no wiring splices are allowed outside of an approved enclosure. One type of approved enclosure is a junction box. A junction box is simply a standard electrical box that is mounted securely (to house framing or another structure) and contains the splice—the wiring connection—of two or more circuit cables or wires. The cables are secured to the box with cable clamps (or conduit connectors, if the circuit includes conduit), and it must have a removable cover to create a complete enclosure. Junction box covers must remain accessible; they cannot be covered with drywall or other surface material.
By Manon Marianne. Electrical Wiring. Published at Tuesday, March 20th 2018, 19:57:14 PM. Install a cable clamp for each cable, as needed. Standard plastic electrical boxes do not have knockouts and contain internal cable clamps. Metal boxes may have internal clamps; if yours does not, install a locknut-type clamp for each cable. Insert the threaded end of the clamp through a knockout hole and secure the clamp inside the box with the nut. Tighten the nut with pliers.
By Sebastien Abel. Electrical Wiring. Published at Tuesday, March 20th 2018, 19:53:42 PM. Whenever we flip a switch, plug in an appliance, or adjust a reading light, we interact with the electrical system in a house. A good electrician can make those interactions easier in a hundred little ways, so it's best to communicate your needs early—ideally after the house is framed and before the drywall or insulation goes up. That's when master electrician Allen Gallant, who has wired many This Old House TV projects, takes his customers on a job-site walk-through, showing where he plans to put switches, lights, and receptacles. "I'll even ask them if they're left-handed or right-handed," he says. "It makes a big difference when you're looking for the light switch." It's easy to make changes at this point in the process, but once the walls are closed in, any second thoughts become far more difficult and expensive to implement.
By Sebastien Abel. Electrical Wiring. Published at Tuesday, March 20th 2018, 15:24:41 PM. Electrical installation work is mechanized through the use of general-purpose construction machinery—for example, lift trucks, hoists, and truck cranes—and of specialized electrical-installation machinery, devices, and tools. The time required for electrical installation work is reduced and the productivity of labor in such work is raised primarily through the use of industrial methods of installing electrical equipment and through the delivery to construction sites of structures for the installation of wiring and elements of electric wiring in consolidated subassemblies and units, which are fabricated and assembled in electrical-installation prefabrication shops. The level of industrialization of electrical installation work is due in large part to the output by industry of complete sets of electrical equipment and of electric wiring that can be easily installed and adjusted.
By Olivier Danielle. Electrical Wiring. Published at Tuesday, March 20th 2018, 08:52:14 AM. The NEC is used in conjunction with local, country, and State codes that strictly control electrical wiring. The codes are concerned with proper size of wire and with insulation. Factors that are considered are the expected load, the frequency of modifications, and the nature of the environment where the wire is used. Homes have small loads, infrequent modifications and a very non-corrosive environment. Commercial establishments are usually in the middle. The load demands are sometimes higher, and modifications are not infrequent. The factory or industrial site has a very high demand. Modifications are frequent, and the environment is often highly unstable.
By Faustine Arnaud. Engine Wiring. Published at Tuesday, March 20th 2018, 00:49:01 AM. Stability and control have been major roadblocks to the implementation of many advanced combustion modes. Many low-temperature combustion modes such as GCI and RCCI operate on the edge of stability—in other words, at conditions under which very small variations in engine boundary conditions (such as intake temperature) may result in unintended excursions that result in undesirable emissions, reduced efficiency, and the potential to destroy the engine or emissions control system. One can imagine the challenge of these types of combustion modes under ever-changing conditions of a real-world drive cycle where a single unintended excursion could be catastrophic. Meeting that challenge requires a control system which is predictive for avoidance rather than reactive after the occurrence of a potentially damaging event.
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