26. Armored cable used to connect recessed luminaries or equipment within an accessible ceiling can be unsecured for lengths up to а. 2 ft. b. 3 ft. - C. 4 2 ft. d. 6 ft.
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- L1. Boxes are classified by type, construction, andA. installation location.B. luminaire support capability.C. number of knockouts.D. power rating L2. Which of the following devices must be placed at each end of an armored cable to prevent damage tothe conductors?A. An insulating sliderB. An insertion couplingC. An antishort bushingD. A metal loop fitting L3. Which of the following is the maximum cross-sectional conductor fill area for underfloor raceways?A. 50%B. 60%C. 40%D. 30%5. Which of the following descriptions of a ground ring is correct?A. A ground ring is a circular formation that's made up of six or more grounding electrodes.B. A ground ring is a coiled conductor that's buried underneath a utility pole.C. A ground ring is a device that's used to clamp a conductor to a water pipe.D. A ground ring is a bare copper conductor that will encircle an entire structure underground.Liquidtight flexible metal conduit may serve as a grounding means in sizes up to and including _______ in. where used with listed fittings.
- 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. ____________________ ____________________15. What does a grounding symbol on a construction drawing convey?A. A single ground rodB. A grounding electrode systemC. A ground-fault current pathD. An equipment grounding conductor1. A 30-ampere, 120-volt, UF cable circuit is buried from a dwelling unit to a detached outbuilding. The minimum depth of this cable is inches. A. 6 inches C. 24 inches Ans. B. D. 12 inches 18 inches
- 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…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 aluminum7.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.
- Complete the connections for the diagram. Installation is cable.A Type NM cable carries a branch circuit to the outside of a building, where it terminates in a metal weatherproof junction box. From this box, a short length of EMT is installed upward to another metal weatherproof junction box on which is attached a cluster of outdoor floodlights. The first box is located approximately 24 in. (600 mm) above the ground. To Meet Code, do the metal boxes and metal raceway have to be grounded? Yes _______________ No _______________ NEC _______________.13. Which of the following is a method for identifying a grounding terminal for connecting an equipmentgrounding conductor to a device?A. The letters EGCB. A green octagonal nutC. A red pressure wire connectorD. A green screw with a hexagon head