Exam 32: Standby Power Systems

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

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.

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.

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.

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.

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

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

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

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.

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

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

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

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

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

Generators for home use are generally rated in ____________________.