Chapter 33 EO test

Table 6907(A) limits photovoltaic source and output circuits to ____ volts or less for one- and two- family dwellings.

600

A photovoltaic module is manufactured unit made up of many semi-conductor PV cells encased in a protective covering and mounted to a(n) _____ frame.

Aluminum

Define anti-islanding.

Anti-islanding means that an inverter just automatically turn off ac output when utility power is lost.

Inverter size is based on the _____ of the array.

Capacity

An inverter or ac module is required to automatically _____its output when utility power is lost.

De-energize

Factors that have recently made photovoltaic systems very popular include_______.

Environmental concerns with the use of fossil fuels and concern over dependence on foreign sources of energy.

A disconnect for the ungrounded dc string conductor(s) is never required before the conductors enter the dwelling.

False

If circuit conductors for PV systems were sized using the requirements of 690.8(B) and there are no external sources of parallel currents that exceed the ampacity of the conductors, then over current protection is required.

False

Photovoltaic modules that also serve as an outer protective finish for a building are known as structure-integrated photovoltaic (SIPV) modules.

False

A system to perform rapid shutdown of PV systems on buildings is required to reduce ______ for emergency responders.

Fire shock hazard

A dedicated PV system circuit breaker, suitable for backfeed and positioned at the opposite end of the bus from the ____, is a requirement of NEC 705.12(B)

Main circuit breaker

A single small inverter connected to each photovoltaic module is known as a _______-inverter.

Micro

When determining the circuit size and current of a PV system, first use a multiplier to calculate the maximum source circuit current, then apply a second multiplier to determine the size of system conductors and ______ devices.

Overcurrent

How are the sizes of PV system conductors and components determined?

The sizes are determined by the amount of current that flows through them.

What must buildings with stand-alone or utility-interactive PV systems have to indicate the presence of the system and location(s) of disconnecting means?

They are required to have a plaque or directory indicating the presence of the system and location(s) of disconnecting means.

Most residential PV systems are made up of _______ strings that can be combined in a single box.

Three to six

Electricity generated by the photovoltaic modules is direct current (dc)

True

Grounding of the dc conductor is usually accomplished at the inverter, although it is permitted at any single point.

True

Exposed single-conductor cable is permitted to be installed for array interconnection, aid only types ____ and listed PV wire are permitted.

USE-2

A connection on the _____ side of the main disconnect is known as a supply-side point of connection.

Utility