does compliance with the nec always result in an electrial installation that is adequate, safe, and efficient? why

How does the amount of leaking electricity consumption compare with the total amount of electricity used in your household? Can you think of ways to reduce the leaking (stand-by) electricity use?

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. 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.

Question 3: Suppose an engineer designed a fire alarm system for a large warehouse, with multiple pushbutton switches connected to a single alarm siren: Siren Actuating any of the normally-open switches results in the alarm sounding. So far, so good. Now, suppose that one of the wires connecting one side of several switches to the rest of the circuit breaks open. What will the result of this failure be? Siren break!