Exam 16: Emergency, Legally Required Standby, and Optional Standby Power Systems

Generators must be oversized when supplying ____ loads to reduce heating and voltage waveform distortion.

____ power supply systems are often installed to provide "clean power" to critical loads such as computers.

The main purpose of a(n)____ system is to automatically come on to supply, distribute, and control power and illumination essential for safety to human life in the event that the normal supply of power is interrupted.

Generator units with a capacity greater than 15 kilowatts generally use ____ cooling.

According to NEC 700.6(A), a(n)____ is required for emergency systems, consisting of a signal device with both audible and visual alarms.

If two motors are to be started at the same time, the standby power system must have the capacity to provide the ____ of the starting kilovolt-ampere values for the two motors.

The Life Safety Code is another name for ____.

Fuels that may be used in an emergency generator are LPG (liquid propane)gas, natural gas, gasoline, or ____.

Manufacturers of generators, transfer switches, and signaling devices also provide panelboards that have the ____ built right into the panelboard. This is a nice feature for installations where one panelboard is to serve the emergency or standby power requirements.

What is a legally required standby system?

What is the mechanism behind the generation of backfeed?

In a typical branch-circuit installation for an emergency system, ____-operated switches are installed to prevent unauthorized personnel from operating the luminaires.

NEC 701.12( G )____ the connection for a legally required standby system to be made ahead of, but not within, the main service disconnect.

When are self-contained emergency power systems used?

According to NEC 110.9 , switches and fuses must have a(n)____ capacity not less than the available short-circuit current at their supply terminals.

There have been many injuries and deaths as a result of ____; it has been called "the Hidden Killer."

What are the advantages and disadvantages of selecting diesel fuel to drive a generator engine?

Why is it important to accurately determine the capacity of a power system?

The starting kilovolt-amperes for a motor is equivalent to the ____ kilovolt-amperes of the motor.

Among the types of healthcare facilities covered in NEC Article 517, ____ generally have the most stringent requirements, and clinics and medical and dental offices have the least stringent requirements.