Not more than ____ ft of high-voltage cable shall be permitted in nonmetallic conduit from a high-voltage terminal of a neon transformer ( over 1000 volts, nominal ) supply to the first neon tube
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- 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 aluminumElectrical plants Define the terms "Main column ." " Line ." " Protection earth " and " Operating earthIn the conduit diagram shown in Figure 1–3, determine how many wires are in each conduit between each piece of equipment. Identify each wire terminal connection and the quantity of wires, as shown in the example, above the disconnect switch.
- QUESTION 1 The required terminal wiring space for 4/0 AWG THHN copper conductors entering a 480-volt transformer housing and bent 90 degrees to enter the terminal is _____. a 3 inches b 4 inches c 5 inches d 6 inchesWhat is the minimum size copper grounding electrode conductor for each of the following residential electrical services? Refer to Table 250.66. The ungrounded conductors are Type THW copper. 310.15(B)(7) is only for 120/240-volt, single-phase residential services and feeders. This Section does not apply to services and feeders other than residential.of p o How many conductors enter the ceiling fan/light wall box? Switch ond out let boxes s tirst 10. What type and size of box may be used for the ceiling fan/light wall box?. 11. What type of covers are used with 4 in. square outlet boxes? 12. a. Does the circuit for the Master Bedroom have a grounded circuit conductor? b. Does it have an equipment grounding conductor? c. Explain the difference between a "grounded" conductor and an "equipment grounding" conductor. 13. Approximately how many feet (meters) of 2-wire cable and 3-wire cable are needed to ft complete the circuit supplying the Master Bedroom? Two-wire cable: ft (- m). m). Three-wire cable: 14. If the cable is laid in notches in the corner studs, what protection for the cable must be provided? 15. How high are the receptacles mounted above the finished floor in this bedroom? 16. Approximately how far from the bedroom door is the first receptacle mounted? (See the plans.) 17. What is the distance from the finished floor to…
- QUESTION 87 Unless otherwise specified, the applicable product standards evaluate the fill markings covered in 314.28(A)(3), based on conductors with Type _____ insulation. a. RHW b. THHN c. XHHW d. THHWTo testing installation of grounds, the usual procedure is to connect one lead of the megohmmeter to one of the conductors, then the other lead is___. A, connected to another conductor b, connected to the conduit or raceway c. Connected to a special grounding electrode on the megohmmeter d. Left unconnected1. 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.…
- III. Procedures: BLOCK DIAGRAM Interconnect the electrical components per set in a block diagram according to its function and voltage rating. SINGLE-LINE DIAGRAM Interconnect the electrical components per set in a single-line diagram according to its function and voltage rating using standard electrical symbols and legends if needed. Set A Transformer (230/115-VAC) Circuit Breaker Electric Fan (230-VAC) Television Set (115-VAC) ACU (230-VAC) Generator (230-VAC) Set B Fuse Lightings (230-VAC) Generator (115-VAC) Transformer (230/115-VAC) Refrigerator (115-VAC) Transformer (115/230-VAC)When connecting a multiwire (3-wire) circuit to a single phase panel, one ungrounded conductor must be connected to the ____ phase and the other ungrounded conductor must be connected to the ____ phase. Select one: a. A, A b. B, B c. A, B d. doesn’t matter28. A multiwire circuit must consist of conductors connected to ____. Select one: A. THE SAME PHASES B. DIFFERENT BRANCHES C. THE SAME BRANCH D. DIFFERENT PHASES