Improper electrical terminations lead to high resistance connections, which in turn lead to electrical system failures. Incorrect electrical connections can cause fire or other damage to property and can cause damage and traffic.
EXPLANATION:
There are six common errors of wire connection and its solution:
1. Loose Wire Connections at Switches and Outlets
To overcome this problem, it is first necessary to turn off the power to the wall switch, lamp, or suspected outlet. With the power off, you can detach the cover plate and use a torch to carefully inspect the screw terminals inside where the cables are connected. If you find something loose, tighten the screw terminals carefully to the cable; most likely, this will solve the problem.
2. Wire Connections Made with Electrical Tape
To solve the problem, turn off first the power to the circuit. Afterward, detach the electrical tape from the cables and clean them. Check if there is an exact number of open wires showing (for most connectors, it means about 3/4 inches), then join the cables together with a cable nut or other official connectors (now there are push-in connectors that some aces like use).
3. Two or More Wires Under One Screw Terminal
To fix this problem, once again, this maintenance involves first switching off the power. Then, the two offending cables are detached from their screw terminal. Cut a six-inch pigtail cable of the same color as the two cables (use a green pigtail to join two bare copper grounding cables).
4. Exposed Wires
To solve this problem, switch off the power to the device, then remove the cable and remove the excess cable or remove the additional insulation so that the correct number of cables is exposed. Then, reconnect the cable to the wire nut or screw terminal. Pull the cable a little to make sure they are steadily connected.
5. Loose Connections on Circuit Breaker Terminals
To solve a problem, maintenances on the major service panel must be carried out by a professional electrician. Amateurs should only try this improvement if they are experienced and have knowledge of the electrical system.
6. Faulty Neutral Wire Connections at Circuit Breaker Panels
To solve this problem, the electrician will inspect to validate the neutral cable is sufficiently stripped and properly installed to the neutral bus.
LEARN MORE
If you’re interested in learning more about this topic, we recommend you to also take a look at the following questions:
• An electric cell is a source of electric current because of a ________ between the terminals https://brainly.com/question/3583759
• Which of the following is maintained across the terminals of a battery? https://brainly.com/question/5564824
Keywords : Improper electrical terminations, electrical system failures.
Subject : Computers & Technology
Class : College
Sub-Chapter : Electrics
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In this, the user can't access the internet one day, upon calling technical assistance, we discover that someone has hacks through the router and altered all of its settings. Fortunately, the hacker was only interested in your internet access and did not look at any of your computer's data. So, the choice to leave your connection unencrypted exposed yourself to hazards to authenticity on your computer's data.Therefore, the given statement is "False".
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The ampacity of a No. 12 aluminum wire with RHW insulation installed in a raceway that has 19 other wires is
A. 7 A.
B. 5 A.
C. 10 A.
D. 15 A.
The ampacity of a No. 12 aluminum wire with RHW insulation installed in a raceway with 19 other wires is most accurately 7 A, as the NEC dictates derating to 50% for more than 9 conductors, which is 7.5 A. We typically select the nearest standard size of overcurrent protection device below this value, giving us 7 A in this case.
Explanation:The student is asking about the ampacity of a No. 12 aluminum wire with RHW insulation when installed in a raceway with 19 other wires. The term ampacity refers to the maximum current an electrical conductor can handle before deteriorating under the heat caused by electrical resistance, which is an important consideration in electrical wiring installations. According to the National Electrical Code (NEC), the base ampacity of No. 12 aluminum wire is generally 15 amps. However, when multiple wires are bundled together, as in a raceway, the ampacity must be derated due to the reduced ability to dissipate heat.
For 4-6 current-carrying conductors, the NEC suggests derating to 80%, 7-9 to 70%, and more than 9 to 50%. Therefore, with 20 conductors, the ampacity would be derated to 50% of 15 A, which is 7.5 A. But in practice, we use the nearest standard size of overcurrent protection device below the ampacity after derating, which usually brings us to either 7 or 5 amperes. Options 10 A and 15 A would be too high and disregard the need for derating. Thus, the most accurate answer, based on NEC guidelines, would likely be 7 A. Still, official guidelines and local regulations should be consulted to determine the exact ampacity as it may vary based on specific conditions.
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The ampacity of a No. 12 aluminum wire with RHW insulation installed in a raceway with other wires will be de-rated according to the National Electrical Code (NEC). The NEC provides a table for the allowable ampacities of conductors, but they must be adjusted when multiple conductors are bundled together, as they generate more heat and can handle less current.
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Unfortunately, the question does not provide the exact de-rating factor needed for a bundle of 20 wires; the NEC must be consulted directly for specific de-rating factors. Nevertheless, the closest answer from the provided options, based on the typical 80% de-rate, would be 7 A (Answer A).
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