An 800 amp fuse rated at 600 volts _____ on a 250 volt system. A. shall not be used B. must be used C. shall be permitted to be used D. none of these
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An 800 amp fuse rated at 600 volts _____ on a 250 volt system.
A. shall not be used
B. must be used
C. shall be permitted to be used
D. none of these
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- Two of the circuits will be a 3-wire, multi-wire branch circuit (Edison 3-wire). The location of the devices is to be determined by the student. The student shall be responsible for selecting the correct circuits, do not ask the instructor which circuit number should be used. Circuit A. One lampholder and one duplex receptacle controlled by a Single Pole Switch. Circuit B. Single Pole Switch controlling the top half of a duplex receptacle that when energized, is indicated by a Pilot-light at the Single Pole Switch location; plus an Isolated Ground Duplex Receptacle that is always hot. Circuit C. The bottom half of the switched receptacle on Circuit ‘B’ is to be always hot; plus another Duplex Receptacle that is controlled from two locations using a Coast 3-Way wiring-system.schedules are typically provided to detail the circuits and overcurrent protection required for listribution equipment. Branch-circuit - Outlet C. d. ore distribution points for electrical in .... Switch Panelboard1. Draw a Wiring Drawing of this circuit.
- 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…Draw a dysfunctional circuit. Why is the circuit not functional?Connect the initial circuit as shown in Figure 47-1.2. Set VA at 20 volts. Insert a jumper wire between points A and B and observe the meter action.OBSERVATION Current flowed for approximately ___________ seconds as evidenced by the voltagemeasured across R. The rate of charge was (linear, nonlinear) __________________.nCONCLUSION The current that flowed was the charging current that charged the capacitor to avoltage equal to (VR, VA) ____________________. Was charging current maximum atthe beginning of the charge time or near the end? _________. At the beginning of thecharge time, the voltage across R was equal to (VC , VA) _______________________(the first instant). At the end of the charge time, the voltage across the resistor is________ volts; the voltage across the capacitor is equal to VA.
- Define the fuse, outlet, switch and plug and give the importance of each electrical materials.8.a. The general lighting load is based on a _______ per square foot basis.A. volt-ampereB. general illuminationC. number of circuitsD. kilowatt8.b. A _______ fuse is a fuse that may detect and remove a short circuit almost instantly but allows smalloverloads to exist for a short period of time.A. current-limitingB. cartridgeC. time delayD. nontime delay2. When working on a high - voltage system , it is best to keep anyone who is not part of the ser vice away from you and the car by creating a buffer zone around the car . Technician A makes sure the outside edges of the zone are at least one foot away from the car . Technician B places B orange cones to define the outer boundaries of the zone. Who is correct ?
- Which of the following statements about equipment grounding conductors (EGCs) is true?A. The National Electrical Code permits the EGC to also perform as a grounding electrode conductor.B. More than one EGC must be used if multiple circuits are installed in a single raceway, cable, or cable tray.C. No current should be present in the EGC during normal operation.D. EGCs are required to be decreased in size to address voltage drop.An 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 choice4. Draw a circuit diagram that represents this wiring drawing. The components "A" and "S1" are a lamp and switch, respectively.