Speakers in stereo systems have two color-coded terminals to indicate how to hook up the wires. If the wires are reversed, the speaker moves in a direction opposite that of a properly connected speaker. Explain why it is important to have both speakers connected the same way.
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- 17.b. Which of the following is the best example of a building supplied by a single branch circuit?A. A detached carport with no doors, walls, or windowsB. A detached garage at a dwelling occupancyC. A ground-mounted air conditionerD. A university dormitoryAll components of an exposed wiring system, installed where walls are frequently washed, must be mounted with a minimum of _____ in. airspace between components (boxes, fittings, conduits, etc.) and the wall (supporting surface). Select one: A. 1/4 B. 1/8 C. 1/16 D. 1/2Connections from headers to cabinets and other enclosures, in cellular concrete floor raceways, shall be made by means of ______. Select one: A. LISTED METAL RACEWAYS. B. LISTED NONMETALLIC RACEWAYS. C. LISTED FITTINGS. D. A ONLY E. A AND B ONLY F. A, B, AND C
- 16.A. The grounding electrode conductor should be installed without a splice, unless the splice is made usingexothermic welding or byA. stainless steel terminals.B. a reversible tap connector.C. a grounding terminal jumper.D. irreversible compression connectors.16.B. In an air compressor system, the distribution piping can be bonded using theA. equipment grounding conductor supplying the air compressor's motor.B. grounding electrode driven near the compressor motor.C. grounded neutral conductor.D. equipment grounding conductor at the service entrance.16.C. Which of the following would help avoid the choke effect in grounding electrode conductors?A. Installing a main bonding jumperB. Using an approved polyvinyl chloride conduitC. Applying solder to the connectionD. Using bonding bushes on the ends of the raceway9.a. What should be done with the connector ferrule once a connector is attached to a fiber optic cable?A. It should be polished.B. It should be broken off and thrown away.C. Connectors don't have ferrules.D. It should be roughened with sandpaper.9.b. Which type of test should be performed on an installed cable after it has been terminated?A. Bit error rate testB. Continuity testC. OTDRNeed correct answer asap with explaination
- A plug and connector used for cable termination is identified as 6P6C. The "6C" indicates that the connector has 6 contacts available. has 6 contacts installed. is the sixth connector. is for modems. Most of the loads supplied by an equipment branch are _______ V, three-phase. 480 120 360 240 A/An _______ is a type of hazardous location protective equipment that allows non-explosionproof motors to be used in Class I locations by supplying a continuous flow of clean air to remove flammable vapors. gas detection system explosionproof apparatus dust-ignition-proof apparatus purged and pressurized apparatus If you're installing a generator that's rated to provide 100 A of current, the conductors you use must have a minimum capacity of 142 A. 135 A. 115 A. 150 A.Explain this diagram for dummyL1. Boxes are classified by type, construction, andA. installation location.B. luminaire support capability.C. number of knockouts.D. power rating L2. Which of the following devices must be placed at each end of an armored cable to prevent damage tothe conductors?A. An insulating sliderB. An insertion couplingC. An antishort bushingD. A metal loop fitting L3. Which of the following is the maximum cross-sectional conductor fill area for underfloor raceways?A. 50%B. 60%C. 40%D. 30%
- The following problems refer to grounding requirements. Give the source of yourresponses.1. What is the proper size copper grounding electrode conductor for a 100-ampere service that consists of 3/0 AWG ungrounded conductors?The Code does not cover installations under the exclusive control of an electrical utility such as A-survice drops and laterals B-electric utility office building C-electric utility warehouses D-electric utility garagesAnswer the question correctly using proper equation. Thanks