Deck 32: Standby Power Systems

Question 1

Where the normal power main service disconnecting means is located inside of the home, some electrical inspectors will require that a disconnect for the standby power from the generator be installed near the back door of the home.

Answer 1

False

Question 2

Because generators produce a certain level of ____________________ when running, you will want to check with your building authorities to make sure the generator you choose is in compliance with local codes that might be applicable.

Answer 2

noise
decibels

Question 3

For home installations, transfer switches may be ____________________ or double-pole, double throw (DPDT), depending on how the type of system is being installed.

Answer 3

3-pole double throw
TPDT
3-pole double throw (TPDT)

Question 4

How must a transfer switch connected to the line side of the main service disconnect be listed?

Question 5

Standby power conductors and normal power conductors must not be run in the same raceway or enclosure.

Question 6

Actual wiring of a typical standby generator consists of ____ ungrounded conductor(s) and one grounded "neutral" conductor.

A) one
B) two
C) three
D) four

Question 7

What must a transfer switch must do in such a way that there is no feedback from the generator to the utility system?

Question 8

The conductors that run from the standby generator to the transfer switch and to the generator panelboard that contains the branch-circuit overcurrent devices shall be sized not less than ____ percent of the generator's nameplate current rating.

A) 80 percent
B) 115 percent
C) 125 percent
D) 150 percent

Question 9

The term separately derived system as defined in NEC Article 100 means that the transfer equipment must break all system conductors from the generator, including the neutral.

Question 10

If a homeowner has a generator without GFCI protection, a listed ____________________ that has GFCI protection may be used.

Question 11

NEC 590.6(A)(3) requires that all 125 volt and 125/250 volt, single-phase, 15-, 20-, and 30 ampere receptacle outlets that are a part of a ____ kW or smaller portable generator shall have listed groundfault circuit interrupter protection for personnel.

A) 10
B) 15
C) 25
D) 50

Question 12

Which loads in a house are homeowners typically concerned about continuing to have power in the event of a power outage?

Question 13

The generator for a standby power system is permanently installed on a concrete pad at a suitable location outside of the home.

Question 14

Generators for home use are generally rated in ____________________.

Question 15

A transfer switch shifts power from the normal utility source to the ____________________.