ELTRY251
Chap 11
Quiz 05 Practice
Please Print
Name:
KEY
Electrical Integration
Describe the following
Item
1
Description
PV Electrical
Installation
should be done
by and
Inspected by
1. Licensed Technician or Contractor
2. Authority Having Jurisdiction (AHJ)
2
Majority of
Rules and
Regulations are
Govern by
3
What is A PV
Power Source?
4
What is a PV A circuit which connect a group of modules together and to the
Source Circuit? common connection point of the DC system
5
What is a PV Circuit which connect PV Power Source to the rest of the
Output Circuit? system
NEC
An array or collection of arrays that generates DC power
6
What is the
maximum PV
system
Voltage?
Array’s Open Circuit Voltage at Lowest temperature
7
What is the
maximum
Residential PV
system
Voltage?
600 VDC
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ELTRY251
Chap 11
Quiz 05 Practice
Please Print
Name:
8
9
10
What is the
Maximum PV
system
Current?
# 12 AWG and
#10 AWG,
Which one has
larger
Diameter?
# 12 AWG and
#10 AWG,
Which one has
larger
Ampacity?
KEY
Electrical Integration
125% of Array’s Short Circuit Current
125% is for variation in Irradiance
# 10 AWG
# 10 AWG
11
What is NEC
Recommended
Voltage Drop?
12
What should be
the color of
White or Gray
Grounded
Conductor?
13
What should be
the color of
Bare, Green, green with Yellow Strips
Grounding
Conductor?
14
What should be Any Color other than, White, Gray, and Green
the color of
DC  Red or Black
Ungrounded
AC  Black, Red, Blue
Conductor?
15
All connection
except Module
connections
should be
within a
3%
Junction Box
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ELTRY251
Chap 11
Quiz 05 Practice
Please Print
Name:
KEY
Electrical Integration
16
What are the
characteristics
of the module
connectors?
1.
2.
3.
4.
5.
17
What are NEC
requirements
for DC Plugs
and
Receptacles?
1. Must be rated and marked for DC with min 15 A rating
2. Must have a grounding terminal
3. Must be different than all other plugs in the location
18
When Conduits
When Conductors are accessible and voltage is over 30 V
are required?
19
What is the
function of
Over-current
Protection
Devices?
20
What are
causes of Overcurrent
21
22
23
Can same type
of Fuse be used
for both AC
and DC
Circuits?
Can
Automotive
fuses be used in
PV DC
Circuits?
What is current
rating of the
Over-current
protection
devices?
Must be polarized
Must have Locking mechanism
must protect against accidental contact with person
Must use a tool to disconnect and have marking
Grounding conductor must connect 1st and break last
Prevents conductors and devices form excessive temperature
due to high current
1. Over Load
2. Ground Fault
3. Short Circuit
No
No
125% of Maximum Current
This is in addition to 125% conductor rating
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Page 3 of 5
ELTRY251
Chap 11
Quiz 05 Practice
Please Print
Name:
KEY
Electrical Integration
24
What is
Interrupting
Current?
Maximum current that an over-current protection device can
handle without arcing or shorting
25
What is the
function of
Disconnect?
To isolate conductors and equipment from the source
26
27
28
Describe the
Conductors
connections in
the DC
Disconnect.
Describe the
Conductors
connections in
the AC
Disconnect.
What type of
circuit breaker
is used for
inverter/utility
connection?
1. Only Positive (+) conductor (RED) will be connected to
Line side of Disconnect.
2. Negative (-) conductor (WHITE) and Grounding
Conductor (GREEN) are neither switched nor connected
to each other
1. Conductors (2) from Inverter will be connected to the
Load side of disconnect
2. Conductors (2) to the Service panel will be connected to
the Line side of disconnect
Back-fed
29
What are the
functions of
grounding?
1. Provides a safe pass for fault currents and lightning
2. Provides protection foe people and equipment
30
Which PV
Systems
require
grounding?
Any system with a maximum voltage of 50 V or more. This is
the adjusted voltage for low temperature.
31
What is
Grounding
Electrode?
What is its
Function?
1. A conductive rod or bare wire buried under ground
2. Provides a low resistance to ground
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Please Print
Name:
KEY
ELTRY251
Chap 11
Quiz 05 Practice
Electrical Integration
32
What is Ground
Fault and
typically
caused by
what?
33
What is Ground The automatic opening of the conductors involved with Ground
Fault
Fault
Protection?
34
What are 2
different types
of Ground
Fault
Protections?
35
What are the
functions of
GFDI and
GFCI?
1. Undesirable current flowing through the grounding
conductor it could cause significant shock or fire hazard
2. Typically caused by damage to the protective insulation
of the current carrying conductor
1. Ground Fault Detection and Interrupter (GFDI)
2. Ground Fault Circuit Interrupter (GFCI)
1. GFDI  Protect equipment
2. GFCI  Protect people
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