NABCEP PV System Inspector
Certification
. When sizing a fuse for a PV supply circuit, the short circuit present day of the PV module is
improved via ________ and the rounded as much as the next commonplace OCPD size. -
ANS-1.56
690.8(A)(1) or (A)(2).
10 one of a kind 12 AWG THWN-2 conductors and 4 exclusive 10 AWG THWN-2 conductors
are to be put in a unmarried intermediate metallic conduit (IMC) raceway. What is the minimum
raceway length in accordance the NEC? - ANS-¾"
-Chapter nine Table 1
-Chapter 9 Table four (Dimensions and Percent Area of Conduit and Tubing) for IMC
eight copper #eight-AWG THWN contemporary wearing conductors are in PVC conduit three
inches from the roof. What is the derated ampacity of the conductors if the ambient temperature
at the roof is 39°C? - ANS-30.8 A
Use 310 Tables
Explanation: #8-AWG THWN in conduit = 50A Ambient Temp 39C derating factor for 75C cord =
0.88 Derating element for 7-9 present day wearing conductors in conduit = zero.7
50A x 0.88 x zero.7 = 30.8A
A floor mounted PV array has 40 PV supply circuits of 20 PV modules each linked in parallel at
a dc combiner in a discipline. Imp = 8A and Isc = 8.5A. What is the minimal ampacity score of
the PV source circuit fuses? - ANS-15A
A PV device on composition asphalt shingle roof. The general location of the PV array is 250
rectangular feet. The add forces can be eighty pounds according to rectangular foot. There
might be 80 penetrations attaching onto the roof in rafters. According to the American Wood
Council, for the Douglas Fir-Larch rafters, the usage of a 5/sixteen" lag screw, there is 340 kilos
per inch of thread penetration. How many inches of threads must go into the rafters no longer
which include going thru 1" of shingles and racking hardware to compensate only for the 80
kilos in keeping with rectangular foot upload forces? - ANS-¾"
-250 square ft x eighty pounds consistent with square foot = 20,000 kilos 20,000 pounds / eighty
attachment points = 250 pounds according to penetration Since screw can preserve 340 kilos
according to inch and it needs to preserve 250 kilos minimal: 250 pounds / 340 kilos consistent
with inch = .74 inches, which is ready ¾"
A record by a NABCEP Certified PV System Inspector inspection report must consist of: -
ANS-NEC and building code references, set up manuals and images
, A residential service has a split-bus with a 100A breaker in one of the top areas feeding a 125A
busbar underneath. What is the maximum inverter ac output power that may be linked by a
couple of inverters on the lowest a part of the lower busbar? - ANS-nine.6kW
one hundred twenty% Rule
125A bus x 1.2 = 150A 150A - 100A most important breaker = 50A Since 50A is 125% of
inverter modern (and maximum backfeed breaker in lots of cases) 50A / 1.25 = 50A x zero.8 =
40A most inverter cutting-edge USA residential carrier = 240V 240V x 40A = nine.6kW is most
inverter electricity
A roof mounted PV machine with aluminum rails makes use of a naked copper device
grounding conductor (EGC), that is connected to the rails with cable ties. Which of the
subsequent is most in all likelihood to be a trouble? - ANS-Corrosion can be a hassle
Applies to AC conductors of the identical circuit, grounded conductors, and all device grounding
conductors and bonding conductors - ANS-Shall be contained within the identical raceway,
auxiliary gutter, cable tray, cable bus meeting, trench, cable, or cord, until in any other case
permitted.
At least how extensive have to a hearth access pathway be on a residential roof? - ANS-three ft
Based on an ambient temperature of 32°C, what's the ampacity of a #12-AWG, THWN-2 copper
conductor three cutting-edge-wearing conductors and a floor in a raceway? - ANS-28.Eight A
Hint: Use 310 Tables
Battery system running space lighting controls need to be managed by using - ANS-Not by
means of automated means simplest
During an inspection of a 90kW business rooftop PV device, the inspector notices that the
orientation of the PV does now not fit the plans. The solar installer stated the engineer advised
him that it'd be code compliant to alternate the tilt or azimuth, because the NEC does not cowl
PV orientation and the assignment will absolutely be more secure and bring more strength.
What is the fine purpose that the inspector gave for a failed the inspection - ANS-The
installation does not suit the permit design
ESS are required to have air flow.... - ANS-If the ESS generation may have a buildup of toxic
gasses
For an interactive inverter output circuit, that is related to a 30A breaker, what's the minimal
length copper device grounding conductor (EGC) internal of conduit? - ANS-10AWG
-Table 250.122:
How close must overcurrent protection (or cable limiters) be to the connection point to the
service entrance conductors whilst doing a deliver-side connection in a residing? - ANS-10 ft
Certification
. When sizing a fuse for a PV supply circuit, the short circuit present day of the PV module is
improved via ________ and the rounded as much as the next commonplace OCPD size. -
ANS-1.56
690.8(A)(1) or (A)(2).
10 one of a kind 12 AWG THWN-2 conductors and 4 exclusive 10 AWG THWN-2 conductors
are to be put in a unmarried intermediate metallic conduit (IMC) raceway. What is the minimum
raceway length in accordance the NEC? - ANS-¾"
-Chapter nine Table 1
-Chapter 9 Table four (Dimensions and Percent Area of Conduit and Tubing) for IMC
eight copper #eight-AWG THWN contemporary wearing conductors are in PVC conduit three
inches from the roof. What is the derated ampacity of the conductors if the ambient temperature
at the roof is 39°C? - ANS-30.8 A
Use 310 Tables
Explanation: #8-AWG THWN in conduit = 50A Ambient Temp 39C derating factor for 75C cord =
0.88 Derating element for 7-9 present day wearing conductors in conduit = zero.7
50A x 0.88 x zero.7 = 30.8A
A floor mounted PV array has 40 PV supply circuits of 20 PV modules each linked in parallel at
a dc combiner in a discipline. Imp = 8A and Isc = 8.5A. What is the minimal ampacity score of
the PV source circuit fuses? - ANS-15A
A PV device on composition asphalt shingle roof. The general location of the PV array is 250
rectangular feet. The add forces can be eighty pounds according to rectangular foot. There
might be 80 penetrations attaching onto the roof in rafters. According to the American Wood
Council, for the Douglas Fir-Larch rafters, the usage of a 5/sixteen" lag screw, there is 340 kilos
per inch of thread penetration. How many inches of threads must go into the rafters no longer
which include going thru 1" of shingles and racking hardware to compensate only for the 80
kilos in keeping with rectangular foot upload forces? - ANS-¾"
-250 square ft x eighty pounds consistent with square foot = 20,000 kilos 20,000 pounds / eighty
attachment points = 250 pounds according to penetration Since screw can preserve 340 kilos
according to inch and it needs to preserve 250 kilos minimal: 250 pounds / 340 kilos consistent
with inch = .74 inches, which is ready ¾"
A record by a NABCEP Certified PV System Inspector inspection report must consist of: -
ANS-NEC and building code references, set up manuals and images
, A residential service has a split-bus with a 100A breaker in one of the top areas feeding a 125A
busbar underneath. What is the maximum inverter ac output power that may be linked by a
couple of inverters on the lowest a part of the lower busbar? - ANS-nine.6kW
one hundred twenty% Rule
125A bus x 1.2 = 150A 150A - 100A most important breaker = 50A Since 50A is 125% of
inverter modern (and maximum backfeed breaker in lots of cases) 50A / 1.25 = 50A x zero.8 =
40A most inverter cutting-edge USA residential carrier = 240V 240V x 40A = nine.6kW is most
inverter electricity
A roof mounted PV machine with aluminum rails makes use of a naked copper device
grounding conductor (EGC), that is connected to the rails with cable ties. Which of the
subsequent is most in all likelihood to be a trouble? - ANS-Corrosion can be a hassle
Applies to AC conductors of the identical circuit, grounded conductors, and all device grounding
conductors and bonding conductors - ANS-Shall be contained within the identical raceway,
auxiliary gutter, cable tray, cable bus meeting, trench, cable, or cord, until in any other case
permitted.
At least how extensive have to a hearth access pathway be on a residential roof? - ANS-three ft
Based on an ambient temperature of 32°C, what's the ampacity of a #12-AWG, THWN-2 copper
conductor three cutting-edge-wearing conductors and a floor in a raceway? - ANS-28.Eight A
Hint: Use 310 Tables
Battery system running space lighting controls need to be managed by using - ANS-Not by
means of automated means simplest
During an inspection of a 90kW business rooftop PV device, the inspector notices that the
orientation of the PV does now not fit the plans. The solar installer stated the engineer advised
him that it'd be code compliant to alternate the tilt or azimuth, because the NEC does not cowl
PV orientation and the assignment will absolutely be more secure and bring more strength.
What is the fine purpose that the inspector gave for a failed the inspection - ANS-The
installation does not suit the permit design
ESS are required to have air flow.... - ANS-If the ESS generation may have a buildup of toxic
gasses
For an interactive inverter output circuit, that is related to a 30A breaker, what's the minimal
length copper device grounding conductor (EGC) internal of conduit? - ANS-10AWG
-Table 250.122:
How close must overcurrent protection (or cable limiters) be to the connection point to the
service entrance conductors whilst doing a deliver-side connection in a residing? - ANS-10 ft
