The common grounding electrode conductor installed for multiple separately derived systems shall be perm to be what type of pipe that complies with 250.68ICK1 A) A ces are correct B Metal gas Metal water PVC water
Q: All metal enclosures containing an ungrounded ("hot") service conductor are bonded together by use…
A: All metal enclosures containing an ungrounded ("hot") service conductor are bonded together using…
Q: Which of the following statements about bonding is true? A. The strike terminals of a lightning…
A: Lightning pole (US, AUS) or lightning bar (UK) is a metal bar embedded into a structure and proposed…
Q: . Which of the following statements about securing and protecting grounding electrode conductors is…
A: A) Ground elecrodes can be run through wood framings. Since wood being an insulator and doesn't hold…
Q: 19. Which of the following conductors can you install when using the pressure terminals on a…
A: Answer 19. There is no necessary for a receptacle to have something plugged into it for it to cause…
Q: what is the voltage drop percent on two 10 AWG THW copper, stranded, branch- circuit conductors,…
A: Given: what is the voltage drop percent on two 10 AWG THW copper, stranded, branch- circuit…
Q: 1. A feeder is made up of three conductors (500 MCM, copper, 75°C rated) that are placed in a…
A: “Since you have asked multiple questions, we will solve the first question for you. If youwant any…
Q: A DC is supplied through a solid conductor cable. The fault in the cable can be determined by using…
A:
Q: When installing grounding electrode conductor at services, it's common to use a single large common…
A: Here we discuss about grounding/earthing related concept.
Q: Give the raceway size required for each of the following conductor combinations: 1. Five, 10 AWG,…
A: The raceway size required for each of the following conductor combination is given as per the…
Q: How long does it take for the conductors to reach the threshold temperature in a short circuit?…
A: The maximum operating temperature for the given conductor is, T1=70 oC. The cross-sectional area of…
Q: a multifamily dwellings service-entrance conductors consist of four paralleled sets of 3/0 AWG THHN…
A: Here is your answer! I hope this will help you.
Q: ____ must not be installed beneath openings through which materials may be moved, such as openings…
A: From Article 230 of National Electric Code (NEC), the following information can be obtained: Service…
Q: Equipment Grounding 13. A metal elbow is a part of a nonmetallic, underground raceway. The elbow…
A: Note: We are authorized to answer the first question since the exact one wasn’t specified. Please…
Q: What is the withstand rating of a AWG copper conductor? A. 60,516 ampere squared seconds b. 121,032…
A: AWG conductor stands for American Wire Gauge conductor.
Q: Article 300 cable or nonmetallic raceway-type wiring methods installed in a groove, to be covered by…
A: cable or nonmetallic raceway-type wiring methods installed in a groove, to be covered by wallboard,…
Q: 60. A service with copper phase conductors rated al 300 kemil per phase shall have Cu. a minimum…
A: Since you have asked multiple question ,we will slove the first question for you .If you want any…
Q: When the size of the largest ungrounded service conductor exceeds 1100 kcmil copper, then the…
A: Correct option is The 12.5% rule
Q: Which layer in the construction of Underground Cables protects the Steel Wire or Tape from…
A: Which layer in the construction of Underground Cables protects the Steel Wire or Tape from…
Q: 9/ The Underground Cable operating at a Nominal Voltage of 36 KV is classified as Super Tension…
A: The detailed answer is solved below according to the given parameters and instructions in the…
Q: 11. Specific rules apply for the installation of _______, but no identification requirements for…
A: Specific rules apply for the installation of ----------, but no identification requirements for them…
Q: Duct banks for medium- and high-voltage feeders are identified with _______ on top before final…
A: In this case, the identification of the duct banks with medium and high voltage feeders needs to be…
Q: Nec article 210 q.#1 the rating of a branch circuit shall bedetermined by the rating of the?
A:
Q: 16.a. When conductors enter device boxes, a conductor-free length of _______ inches must be allowed…
A: 16. (a) The NEC's Section 300.14 mandates Each outlet, junction, and switch point shall leave…
Q: 20.a. Which of the following conductors can you install when using the pressure terminals on a…
A: Answer 20.a. There is no necessary for a receptacle to have something plugged into it for it to…
Q: 8. Determine the proper size of copper conductors necessary to supply a parallel group of five…
A:
Q: You're installing an aluminum grounding electrode conductor that has an insulating jacket. Which of…
A: Aluminum grounding electrode conductor should not be used in direct contact with masonry or earth,…
Q: 11. Time switches shall be of the enclosed type or mounted in suitable enclosures. 12. The minimum…
A:
Q: 1.a. Section 300.15(C) requires a fitting to be installed on each end of a conduit or tubing being…
A: 1.a. According to NEC section 300.15(C), A conduit or box body shall not be required where cables…
Q: If an equipment bonding jumper is run external to a raceway, it must be less than _______ feet.
A: If an equipment bonding jumper is run external to a raceway , it must be less than 6 feet.
Q: The minimum point of attachment of the service-drop conductors to a building must in no case be less…
A: Service drop conductor is used to supply power to the consumer. These conductors either used as…
Q: Raceways shall not be used as a means of support for Class 2 conductors except under the provisions…
A: Given, Raceways shall not be used as a means of support for Class 2 conductors except under the…
Q: 17/ Which is among these show incorrect order of the layers (inner going outward) in the…
A:
Q: . You're installing type AC cable. The armor coating of type AC cable is allowed for use as an…
A: Requirement for the installation and constructions for AC 'Armored cable' are located in Article…
Q: draw single line diagram of 33kv substation with explanation and not copied from anywhere
A: Single-Line Diagram or SLD A single-line diagram (SLD) is the simplest of the diagrams used to…
Q: Article 300 Direct-buried conductors or cables can be spliced or tapped without the use of splice…
A: Direct-buried conductors or cables can be spliced or tapped without using splice boxes. The given…
Q: What should be the minimum cross-sectional area of each conductor in a two-core cable 100 m long to…
A: Write the expression for the potential difference.
Q: .A. Ferrous metal raceways or enclosures are made with _______ content. A. steel or brass B.…
A: Ferrous metal raceways or enclosures are those with steel or iron content such as rigid metal…
Q: 1._____ must not be installed beneath openings through which materials may be moved, such as…
A: Article NEC 225.19 (D) (3) shows ‘Building Openings’ states that, the overhead branch-circuit and…
Q: NEC 406.4(D)(2)
A: There is an update in the code first one was modified in 2014 and the latest one is of 2017 We will…
Q: a.3. Main bonding jumpers are required to be made of _______ or other corrosion-resistant material.…
A: a.3. Main bonding jumpers are required to be made of _______ or other corrosion-resistant…
Q: 1. What should be the minimum cross-sectional area of each conductor in a two-core cable 100 m long…
A: Referring to the questions, the given data are:
Q: 3. Which of the following statements about the use of structural steel as an equipment grounding…
A: We need to choose the correct option for the given question.
Q: 1. A14/2 type copper used for a general lighting branch circuit.…
A: Hello. Since your question has multiple parts, we will solve first question for you. If you want…
Q: Q1) A 2-wire d.c. distributor cable AB is 2 km long and supplies loads of 100A, 150A, 200A and 50A…
A:
Q: Sixteen 8 AWG copper conductors with type RHW insulation are to be run in a conduit. The conduit is…
A: The power is transmitted using the electric cables. The conductors are made of copper or with…
Q: A single Phase, 86 ampere loaf is located 2800 ft (853m) from the 480-volt electrical power source.…
A: In the given question, a load is 86 ampere that is carried by the aluminum conductor. Hence, the…
Q: 1. A wire used for wiring electric ranges, hot water heaters, stoves and hairdryers where both heat…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…
Q: 10.A. Which of the following is required in each separate service disconnecting means? A. Grounding…
A: In the given MCQ question, options are given and we need to choose the correct response.
Q: In which type of wiring polyvinyl chloride and vulcanized Indian rubber insulated wires are used as…
A: Vulcanized Indian Rubber: These comprises of a copper conveyor covered with a protection layer of…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- a. When more than three current-carrying conductors are installed in one raceway, their allowable ampacities must be reduced according to NEC __________. b. The following is a project. We need four 15-ampere branch circuits. We will use two 3-wire multiwire branch circuits and 14 AWG THHN conductors. We will install the conductors in EMT. The room temperature will not exceed 86F (30C). The connected load is nonmotor and is noncontinuous. 1. What is the minimum trade size EMT? __________ 2. What is the ampacity of the conductors before derating? __________ 3. What is the ampacity of the conductors after derating? __________ 4. What is the maximum overcurrent protection permitted for these conductors? __________ c. Lets increase the conductor size to 12 AWG THHN for the same installation to see what happens. 1. What is the minimum trade size EMT? __________ 2. What is the ampacity of the conductors before derating? __________ 3. What is the ampacity of the conductors after derating? __________ 4. What is the maximum overcurrent protection permitted for these conductors? __________ d. It (is) (is not) necessary to count equipment grounding conductors, a neutral conductor that carries the unbalanced current from other conductors of the same circuit, and/or travelers when installing 3-way and 4-way switches for the purposes of derating the ampacity of these conductors. Circle the correct answer. Explain.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?a multifamily dwellings service-entrance conductors consist of four paralleled sets of 3/0 AWG THHN copper conductors. What size copper grounding electrode conductor is required?
- 7. The size of the supply-side bonding jumpers for each of the individual raceways in the parallel set isrequired to be based on the size of the largest _______ conductor in each raceway or cable.A. equipment groundingB. electrode groundingC. ungrounded service-entranceD. neutral20. A separately derived system is an electrical source, other than a service, having ____ connection(s) to circuit conductors of any other electrical source other than those established by grounding and bonding connections. Select one: A. INDIRECT B. NO DIRECT C. DIRECT D. COMPLETEWhat is the percentage voltage drop for a 208V, three-phase feeder serving a load of 200A at a distance of 290' using 4/0 THWN copper conductors
- A 2 wire d.c distributor AB is fed from both ends at 230V. The total length of the distributor is 830m and loads are tapped off as under, 150A at 200m from A: 300A at 380m from A: 250A at 200m from B; calculate the minimum voltage on the distributor. Resistance per kilometer of one conductor is 0.05 ohms.1. A14/2 type copper used for a general lighting branch circuit. Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 2.Three 8 AWG copper conductors with THHN insulation Installed in garage in electrical metallic tubing (EMT). The ambient temperature in the garage can reach as high as 110'F. All termination points for this circuit are rated 60'C. Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 3.Four 4 AWG copper conductor with THWN insulation imstalled in EMT in a basement. All termination points are rated at 60'C. Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 4. An 8/3 Type UF copper cable installed underground from a house to a detached garage to feed a 120/240-volt subpanel. All termination points are rated at 60'C.…The following problems refer to grounding requirements. Give the source of yourresponses. 1. What is the minimum size copper grounding electrode conductor for a service withthree sets of parallel 350 kcmil conductors (three conductors per phase)?
- 13. If an equipment bonding jumper is run external to a raceway, it must be less than _______ feet.A. 6B. 2C. 4D. 520.a. Which of the following conductors can you install when using the pressure terminals on a receptacle?A. No. 12 solid copperB. No. 10 solid copperC. No. 14 solid aluminumD. No. 12 solid aluminumEnd of exam20.b. Two switches are used to control a light from either end of a hallway. The two conductors that directlyjoin the switches areA. stranded.B. travelers.C. two-phase conductors.D. grounding conductors.19. Which of the following statements about securing and protecting grounding electrode conductors istrue? A. Grounding electrode conductors should not be installed on or run through wood framing members.B. Grounding electrode conductors aren't required to comply with burial depths.C. There's no acceptable method to splice grounding electrode conductors together.D. The electrical worker is typically responsible for judging whether a grounding electrode conductor is exposed to potentialdamage.