National Electrical Code's
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: 20. A separately derived system is an electrical source, other than a service, having ____…
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Q: The insulation rating of class 3, PLTC, FPL, CM cables rated at ____ volts.
A: Ans. 300 volts
Q: The weight of the transmission cable is 1.5kg/m distributed horizontally. If the maximum safe…
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Q: grounding and bonding requirements 17. Which of the following is effective when it comes to…
A: Solve the first question, unless the student has asked for a specific question to be solved, subject…
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A: There are few sections are there, for electric installation and utilization. From this section we…
Q: What is the meaning of the acronym, XLPE? A. EXTRA LOW POLYESTER EQUIPMENT B. CROSS-LINED POLYETHYL…
A: In this we will write about XLPE....
Q: 9.a. What should be done with the connector ferrule once a connector is attached to a fiber optic…
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Q: A bolted line to line short circuit is used to determine the thermal withstand rating of the cables…
A: The power system has to transmit power from the generation side to the load side. For this purpose,…
Q: You have determined that a 4700-ohm, 1⁄2-watt resistor on an electronic cir- cuit board is…
A: Given: A 4700-ohm, 1⁄2-watt resistor on an electronic circuit board is defective. Assuming room…
Q: 13.A. Which of the following is effective when it comes to establishing a bonding connection between…
A: “Since you have asked multiple questions, we will solve the first question for you. If youwant any…
Q: 11. Which of the following statements about the use of structural steel as an equipment grounding…
A: We are authorized to answer the first question since the exact one wasn’t specified. Please submit a…
Q: The interior of a raceway installed on the outside of a building exposed to the weather O (Dry) O…
A: permitted, installing cables of entirely nonmetallic sheaths into the top of a surface-mounted…
Q: What is a reasonable value for estimating total equivalent length of the piping system, including…
A: 1) The Ohm's law states the relationship between voltage and current. According to the Ohm's law V=…
Q: What are the factors to be considered in the Preparation and Design of Electrical System involved in…
A: Electrical system is considered for any circuit or any setup having electrical devices and many…
Q: Evaluate the factors affecting the selection of a renewable energy system against traditional…
A: Renewable energy system: A renewable energy system is a system that uses renewable energy sources…
Q: 4.a. The ___ calculated load is rarely placed on an electrical system. A. optional B. standard C.…
A: An electrical load is a part of a circuit or an electrical component that uses electricity.…
Q: Overcurrent devices do not have to be readily accessible if ____. Select one: A. LOCATED WITHIN A…
A: Overcurrent devices do not have to be readily accessible if LOCATED ADJACENT TO THE EQUIPMENT WHERE…
Q: Please answer the question full sentence 5. Identify the minimum distance requirements between…
A: The minimum distance between the network cable and power sources is 50 millimeter or 2 inches.
Q: when calculating a dwelling lighting load on the "volt-ampere per ft2" basis, the receptacle load…
A: The dwelling lighting load on the "volt-ampere per ft2" basis is to be calculated for the receptacle…
Q: A 240V, 40A, single-phase load is located 150 ft from an existing junction box. The junction box is…
A: Given V = 240 V I = 40 A L1 =150 ft L2 =50 ft
Q: 17. Where flexible cords are permitted by the code to be permanently connected, it is permissible to…
A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: 5.3 A small power system consists of two buses connected by three transmission lines. Assuming that…
A: According to the guidelines solve first three subparts of question you can post other subparts in…
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: 14.a. Section 250.94 requires that an IBT be accessible for inspection and termination and have the…
A: 14.a. IBT stands for Intersystem Bonding Terminal. According to NEC Section 250.94 (B) An IBT be…
Q: The thickness of the layer of Insulation of an Underground Cable depends upon the Voltage to be…
A: In a conductor, The voltage gradient is developed along the length of the conductor which decreases…
Q: resistance testing? A. Fall-of-potential B. Line surge C. Spatial shielding D. Leakage current c.3.…
A: 1) correct option is A because Its function is to keep your equipment or system as close as possible…
Q: Lockout is required: During servicing and maintenance where unexpected ener- gization or start-up of…
A: Bartleby has policy to solve only first question and if it has subparts then solve only first 3…
Q: Discuss the method of reducing to an economically and operationally acceptable level the cost and…
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Q: 10.a. Imagine that you're installing the electrical service to a pool. In this situation, any…
A: Answer 10.a) According to National Electrical Code any equipment which needs electrical connection…
Q: 17/ Which is among these show incorrect order of the layers (inner going outward) in the…
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Q: Connections from headers to cabinets and other enclosures, in cellular concrete floor raceways,…
A: To explain the means of connection made from header to cabinets and other enclosures, in cellular…
Q: As permitted, installing cables of entirely nonmetallic sheaths into the top of a surface-mounted…
A: NEC (National electricity code) article 312 gives requirements about cabinets, cutout boxes and…
Q: What is the minimum number of 15-ampere lighting branch circuits required if the dwelling has an…
A: This problem is solved by analysis "National Electrical Code" table data. From the table 220.12 of…
Q: 20.a. What's the primary disadvantage of using copper conductors? A. Durability B. Cost C.…
A: 20. (a) Although one of the most electrically conductive materials known, copper is easily corroded…
Q: List all the tools and materials for terminating, connecting and testing electrical wiring and…
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Q: List the equipment in detail with rating for substation and swictchgear installation.
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Q: 13. If the largest ungrounded service-entrance conductor for a service is 750-kcmil copper, what is…
A: Choose the correct option, If the largest ungrounded service-entrance conductor for a service is…
Q: You have determined that a 4700-ohm, 1/2-watt resistor on an electronic circuit board is defective.…
A: Resistor=4700 ohm ,Power=0.5 W Current in the circuit; P=I2R0.5=I2×4700I=0.54700I=10.314 A
Q: 1. The only exception to the need for all information technology equipment to be satisfactorily…
A: Note: We are authorized to answer the first question since the exact one wasn’t specified. Please…
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A: Vs = Vi Vd > 0 diode will turn on Vd <0 diode wheel turn off . Here we have two diodes…
Q: All of the following can provide GFCI protection for kitchen countertop convenience receptacles…
A: The National Electrical Code has provided the rules to use the ground-fault circuit interrupters…
Q: Explain each option & Choose the correct option. 4) The _ calculated load is rarely placed on an…
A: Aim To solve the three mcqs along with the necessary reason::
Q: MC encased in a concrete slab, on the first floor of an office building, is considered a _____…
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Q: The purpose of Informative Annex H is to A. safeguard persons and property from hazards arising from…
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Q: C.1. If project documentation is not available, the standard mounting height used for receptacles is…
A: The detailed answer is solved below according to the given parameters and instructions in the…
19. Which of the following is exempted from the National Electrical Code's strict grounding requirements
for equipment?
A. Frames of electrically heated appliances that are temporarily insulated from ground
B. Equipment that's located in a wet or damp location and isolated
C. Distribution apparatuses mounted on wood poles that are less than eight feet tall
D. Insulation that's used as a substitute for grounding and offers equal and effective safety by using double-insulated equipment
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- Load in Figure 1 needs to be connected to Mains Switch Board (MSB) using multicore PVC cable. As a maintenance engineer, you need to proposed cable size for the load, Determine the following issues. 1) Calculate current demand for the circuit. 1) Detemine suitable MCCB (Model and nominal current rating) should be used to protect the load against over-current. im Propose suitable cable size for the load in Figure 1. iv) Calculate voltage drop of the proposed cable WITHOUT consider the cable reactance and voltage drop correction due to higher cable operating temperature v) Calculate voltage drop of the proposed cable BY consider the cable reactance and voltage drop correction due to higher cable operatıng temperature vi) If the multicore PVC eable is change into 3 single core PVC cables, what the suitable cable size. All other multicore cables not available. (25 + variable x) m (A) 30 m (B) (15 + variable b) m (C) Multicore PVC cable MCCB 95 kW. (400 + variable y) V. 0.85 p.f. Load MSB…c.1. Which of the following is one of the three essential functions of an equipment grounding conductor?A. Provide an arc-fault current pathB. Establish groundingC. Establish bondingD. Ensure the system is groundedc.2. What's another name for the three-point method of Earth resistance testing?A. Fall-of-potentialB. Line surgeC. Spatial shieldingD. Leakage current c.3. If the National Electrical Code provides a requirement to ground equipment, it generally implies thatthere will be a direct connection to the Earth of a connection through a/anA. grounding electrode conductor.B. equipment grounding conductor.C. equipotential bonding conductor.D. bonding conductor.5 a) Discuss Electricity power generation and distribution to residential properties. b) with diagrams explain how a Distribution Board is wired to provide electricity to a residential property. c) Explain the following materials and Accessories. i. Male and female bushings. ii male and female adaptors iii. Couplings. iv. Wire/cable sizes and their us
- 20.a. What's the primary disadvantage of using copper conductors?A. DurabilityB. CostC. AvailabilityD. Weight20.b. The NEC requires that each service-disconnecting means be suitable forA. hazardous locations.B. disconnecting the meter.C. wet conditions.D. the prevailing conditions 20.c. As a general rule, each building or structure is limited to a single service. What's an automatic exceptionto this rule?A. A second service deemed suitable for useB. A second service having the proper markingsC. Emergency systems or fire pumpsD. Higher building occupancy7.C. Which of the following statements about bonding is true?A. The joint or termination must offer opposition in the circuit for effective electrical connections.B. Effective bonding keeps impedance high if a fault should occur.C. The entire electrical safety circuit is only as good as its strongest bonded link.D. Bonding connections must endure high levels of fault current until overcurrent protective devices can operate. 7.b. Which of the following is required with a low-voltage incandescent lamp that's operating on a standardservice?A. PhosphorsB. Argon gasC. A step-down transformerD. A ballast 7.a. The ordering code for a large incandescent lamp provides information on theA. lamp power requirement, bulb type and size, and sometimes lamp color.B. lamp power requirement, bulb size and special features, and sometimes filament type.C. lamp voltage, bulb type and size, and sometimes lamp color.D. lamp voltage, bulb size and special features, and sometimes filament type.h.1. In an alternating-current system, the maximum size for a copper grounding electrode conductor isA. 250 kcmil.B. 3/0.C. 500 kcmil.D. 4/0. h.2. The figure shows a fault condition in an ungrounded electrical system. Which of the following will occurbecause of the fault in this system?A. Only the overcurrent protector at Point A will trip open.B. The ground fault will heavily damage the service.C. Nothing will happen until a second ground fault occurs.D. The overcurrent protection will trip, shutting off all the line side power.
- 4.A. If a bonding jumper is installed from a grounded metal box to a grounding-type receptacle, the length ofthe bonding jumper will be betweenA. 2 and 4 feet.B. 2 and 4 inches.C. 6 and 10 feet.D. 6 and 10 inches.4.B. Why isn't solder permitted to be relied on for grounding electrode connections?A. The solder increases the chances of a ground-fault event occurring.B. The heat from the solder weakens the connection and exposes it to physical damage.C. The use of solder doesn't meet the requirements for corrosive influences.D. The connection's integrity can be negatively affected by heat during a ground-fault event.4>c. Which of the following statements about bonding is true?A. The strike terminals of a lightning protection system must be bonded to the building or structure grounding electrode system.B. Bonding requirements on the supply side of the service disconnect are less restrictive.C. Wire-type supply-side bonding jumpers are usually short in length and installed from the…13.B. The amount of fault current that bonding connections have to endure is related to which of thefollowing?A. The quality of the fittings that were chosen for the systemB. The amount of available fault current delivered by the system or utilityC. The type of equipment and the location in the systemD. The number of connections that are part of the listed assembly13.C. What is the most common grounding electrode used to connect utility service equipment to Earth?A. Ground rodB. PipeC. PlateD. Ground ringTraining is required for: Qualified electricians only. Only those workers who work on or near exposed energized parts. Both those workers who work on or near exposed energized parts and those who do not. None of the above. a. b. C. d. Workers who are designated as "unqualified:" Do not need any training. Must become "qualified" within one year. a. b. Must not operate electrically powered equipment. Must be trained in safety-related work practices. C. d. Workers who are designated as "qualified." Work on or near exposed energized parts. a. b. Must be trained to distinguish exposed live parts from other parts of electrical equipment. Must be trained to determine the nominal voltage of exposed live parts. C. d. All of the above. Protect yourself from electrical hazards by: Leaving covers off of electrical panels to make inspection a. easier. Wearing specialized personal protective equipment as needed. Pulling fuses instead of locking out during repairs. d. Removing the ground prong from…
- Determine the size and type of wire to he installed to a building with temperature that reaches 80-90 degrees with the following loads. 10pcs. Of 200- watt bulb 15pcs. Of 100-watt bulb Single phase, 230 source. And if you would be installing the wire inside an EMT conduit, what size would you use assuming that there would be 4 wires inside the EMT1- The recommended limit of voltage drop on a lighting circuit for a single-phase supply as per IEE Wiring regulations is equal to 6.3 volt. Then the value of supply voltage is a. 290V b. 250V c. 210V d. 230V 2- Which of the following statement is TRUE ? a. Resistance is not proportional to length of the material and Resistance is proportional to area b. Resistance is proportional to length of the material and Resistance is proportional to area c. Resistance is not proportional to length of the material and Resistance is inversly proportional to area d. Resistance is proportional to length of the material and Resistance is inversly proportional to area36. Electrical explosions directly into the face of a person working on or near energized electrical equipment can and will cause serious injury or death. OSHA laws and NFPA 70E have strict safety requirements for working on electrical equipment. The basic rules are to turn off the power before working on the equipment and to wear the proper type of nonflammable clothing. To further provide safety for the worker, the National Electrical Code has a requirement pertaining to arc-flash hazard warning. This requirement is found in a. 110.16 (A) b. 220.1 of the NEC C. 330.1 d. 410.5