The minimum depth for a 120-volt, 20-ampere, GFCI protected circuit to an outdoor receptacle run under a street is Select one: a. 12 inches b. 18 inches c. 24 inches d. 36 inches
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- Most residential general lighting circuits are wired with 14-AWG copper conductors and are protected by 15-amp circuit breakers. However, there are many electricians who install 12-AWG copper conductors and protect them with 20-amp circuit breakers. How will you know which conductor size and which circuit breaker size will be used for the general lighting branch circuits in the house you are wiring?3. The three bus-bar conductors in an outdoor sub-station are supplied by units ofpost insulators. Each unit consists of a stack of 3-pin insulators fixed one on the top of the other. The voltage across the lowest insulator is 8-45 kV and that across the next is 7-25 kV. Find the bus-bar voltage of the station. [38-8 kV]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.…
- 7.B. The size of a grounding electrode conductor for a service or separately derived system is generally basedon the size of the largestA. ungrounded supply conductor.B. equipment grounding conductor.C. grounded electrode.D. bonding jumper.7.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.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 EMTAn isolator is used to: Select one: a. To be mounted on towers for insulation purpose b. All of the above c. to disconnect part of the system for maintenance from live circuit d. Insulate the wires to avoid electrocution and short circuits Clear my choice
- A feeder is installed to feed a sub panel. The feeder starts at a 400-amp breaker, utilizing (2) parallel 4/0 THWN-2 copper conductors in the same conduit. What size is the copper equipment grounding conductor required to be? OA. Parallel (2) #1/0 B. #3 OC. #1/0 OD. Parallel (2) #4/0How many lighting branch circuits are provided in this dwelling? __________ a. What is the minimum load allowance for small-appliance circuits for dwellings? See NEC 220.52(A). __________ b. An individual 15-ampere branch circuit is run to the receptacle outlet behind the refrigerator instead of connecting it to one of the two 20-ampere small-appliance branch circuits that are required in kitchens. For this separate circuit, an additional 1500 volt-amperes (shall) (does not have to) be added to the load calculations for dwellings. (Circle the correct answer.)a.1. A main bonding jumper must only be foundA. within enclosures serving as sub-panels.B. at the grounding electrode.C. on the load side of a GFCI.D. within the enclosure that houses the service disconnecting device.a.2. Which of the following statements about grounding electrode conductors is true?A. They restrict the ground connection.B. They eliminate potential differences between conductive objects and the Earth electrode.C. They facilitate operation of overcurrent protective devices.D. They perform bonding between the Earth and grounded conductors.a.3. Main bonding jumpers are required to be made of _______ or other corrosion-resistant material.A. brassB. aluminumC. copperD. copper-clad aluminum
- A homeowner wants to add 12 general-purpose receptacle outlets to the electrical drawings before the house is built, what additional load, in volt-amperes will they add to the service load calculation?Please explain the purpose of the following LabView block diagram structuresPlease use the per-Square-Foot Method to answer the following question: If we figure at one 15-ampere branch circuit for every 600 ft2, a 3000 ft2 house would have a minimum of how many 15-ampere general purpose lighting branch circuits? Group of answer choices A. Four 15-ampere general purpose lighting branch circuits. B. Five 15-ampere general purpose lighting branch circuits. C. Six 15-ampere general purpose lighting branch circuits. D. Seven 15-ampere general purpose lighting branch circuits.