Test 11 Flashcards
The majority of the regulations governing electrical system integration are found in the National Electrical Code.
True
Larger conductors have higher resistance than smaller conductors.
False
The NEC recommends a maximum voltage drop of 5%.
False
Conductors used for source-circuit wiring may need to be rated for outdoor applications with high temperature, moisture, and sunlight resistance.
True
A blocking diode is a diode used to pass current around, rather than through, a group of PV cells or modules.
False
Overcurrent protection devices are classified by how quickly they activate.
True
A disconnect must be manually operable and may be either a switch or a circuit breaker.
True
All current-carrying conductors in the PV output circuit must have disconnect provisions, including the grounded conductor.
True
Equipment grounding is not required for all PV systems.
False
Improper electrical integration can cause ____.
poor performance, component damage, and electrical shock hazards (all of the above)
A PV ____ circuit is the circuit connection the PV power source to the rest of the system.
output
For PV source circuits, the maximum current is ____% of the sum of the short-circuit current rating of parallel-connected modules.
125
Conductor resistance is determined by the ____.
conductor material, conductor size, and ambient temperature (all of the above)
____ is the current that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
Ampacity
A ____ is a protective enclosure used to terminate, combine and connect various circuits or components together.
junction box
The overcurrent protection device rating required for PV system circuits is ____% of the calculated maximum circuit current.
125
A ____ is a rod, plate, or structure that establishes a connection with the eart.
grounding electrode
A(n) ____ is a solid-state device that has a high resistance at low voltages and a low resistance at high voltages.
varistor
A ___ box is a junction box used as the connection point for two or more circuits.
combiner
A PV ____ circuit is the circuit connecting a group of modules together and to the common connection point of the DC system.
source
For one- and two-family homes, the maximum output-circuit voltage cannot be greater than _____ V.
6000
Conductor sizing is based on a conductor’s ____ rating.
ampacity
____ protects a bare conductor from coming into contact with personnel or equipment.
Insulation
Conductor ____ codes are used to identify the purpose of the conductor in the circuit and to match the ends of a conductor.
color
In most cases, _____ are preferable to luge because they are easier to install correctly and involve one fewer connection.
screw terminals
The ____ is the maximum current that an overcurrent protection device is able to stop without being destroyed or causing an electric arc.
interrupting rating
A(n) ___ is a device that protects electrical devices from transients (voltage spikes).
surge arrestor
A(n) ____ is the undesirable condition of current flowing through the grounding conductor.
ground fault
A(n) ____ is a device that opens the ungrounded and grounded conductors when a ground fault exceeds a certain amount.
ground-fault circuit interrupter
