electrical wiring residential 18th edition review question answers 18th Edition Wiring Regulations Training 14 Brilliant Electrical Wiring Residential 18Th Edition Review Question Answers Images

14 Brilliant Electrical Wiring Residential 18Th Edition Review Question Answers Images

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Brilliant Electrical Wiring Residential 18Th Edition Review Question Answers Images - 12/2 and 14/2 nonmetallic-sheathed awg cables input a box. Each cable has an device grounding conductor. The 12 awg conductors are linked to a receptacle. Two of the 14 awg conductors are connected to a toggle transfer. The opposite 14 awg conductors are spliced together because they serve as a transfer loop. The box consists of two cable clamps. Calculate the minimum cubic-inch volume required for the container. Solution: ground cord----#12 (2.25cu. In.)??1 x 2.25 ----------2.25 cu. In. Conductors: 2—#12/2 ---- 2 x 2 x 2.25 ------------------------------nine.00 cu. In. 2—#14/2 ---- 2 x 2 x 2.00 ------------------------------eight.00 cu. In. Devices: 1—toggle transfer –1 x 2 x 2.25 ------------------------4.50 cu. In. 1—receptacle –1 x 2 x 2.25 ----------------------------4.50 cu. In. Fittings (clamps) 2—cable clamps—1 x 2.25 ----------------------------2.25 cu. In. ------------------------------------------------------------- 31.50 cu. In. The use of the same number and length of conductors as in questions 28, but using electric steel tubing, calculate the minimum cubic-inch volume required for the container. There could be no separate device grounding conductors, nor will there be any clamps within the box. Answer: floor twine—must parent on one floor wire due to the local code requirement of all conduit structures requiring a ground wire. The solutions may be the identical because the electrical steel tubing would require the use of metallic connectors that ought to input the box, you will rely them as fittings, this means that that irrespective of how many fittings are getting into the container the you'll parent it at ( 1-instances the cubic inch of the largest conductor that enters the container. To allow for ok conductor period at electrical outlet and device boxed to make up connections, three hundred.14 calls for that now not less than [ 3 in.(75 mm). 6 in. (150 mm), 9 in. (225 mm)] of conductor length be provided. This duration is measured from in which the conductor emerges from the cable or raceway to the give up of the conductor. For container openings having any measurement less than 8in. (200mm), the minimum length of conductor measured form the container opening inside the wall to the quit of the conductor is [ three in. (75 mm), 6 in. (One hundred fifty mm), nine in. (225 mm). Circle the perfect answer. Answer web page 21 discern 2-2 whilst wiring a house, what must be taken into consideration while installing wall containers on each sides of a common partition that separates the garage and a liveable room? The hearth rating of the partitions need to be maintained this means that that bins won't be mounted “again to returned” or in the same air void. A separation of 24 inches horizontal ought to be maintained except the boxes are listed as being fire resistant. The containers which can be on the hearth rated wall have to be nicely included or encased with a hearth puddy. Does the nec® permit steel raceways for use with nonmetallic boxes? Yes _____x______ no__________ nec®______nec® 314.Three (exception) –previded that every one metallic raceways or cables entering the field are bonded together to maintanin the integrity of the grounding route to different equipment within the installation. P. 33.