Deck 33: Residential Utility-Interactive Photovoltaic Systems

Question 1

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

A) mini
B) sub
C) partial
D) micro

Answer 1

D

Question 2

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 ____________________.

Answer 2

overcurrent devices

Question 3

NEC 690.7(C) limits photovoltaic source and output circuits to 600 volts or less for one- and two-family dwellings.

Answer 3

True

Question 4

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

Question 5

Inverter size is based on the ____ of the array.

A) size
B) weight
C) capacity
D) age

Question 6

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

Question 7

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

A) three
B) three to six
C) eight or more
D) six to ten

Question 8

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

Question 9

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

A) de-energize
B) energize
C) increase
D) halt

Question 10

All photovoltaic modules are required by the NEC to be listed to nationally recognized standards.

Question 11

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

Question 12

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

A) USE
B) USE-2
C) PV-2
D) USP

Question 13

Define anti-islanding.

Question 14

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 overcurrent protection is required.

Question 15

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).

A) panelboard
B) disconnecting means
C) main circuit breaker
D) modules

Question 16

According to 690.41, one conductor of a 2-wire PV system over ____________________ volts shall be grounded.

Question 17

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

Question 18

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

Question 19

A combination of factors recently has made photovoltaic systems very popular including ____.

A) environmental concerns with the use of fossil fuels
B) concern over dependence on foreign sources of energy
C) decreased efficiency of fossil fuels
D) both a and b

Question 20

A grounding electrode system is required for ____ photovoltaic systems.

A) dc
B) ac
C) both dc and ac