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WorksheetsSOLAR MOD. 11- #1: Electrical Integration #3
Total questions: 10
Worksheet time: 5mins
A 4 kW PV system includes the following:
inverter with 95% efficiency, voltage loss of 2%, temperature loss of 8%, and cloud shading loss of 20%. What is the efficiency of the system?
95%
35%
65%
100%
A solar integrator company wants to install an 8kW system on a home with: a 200A service panel and a 200A main breaker. According to the NEC, the largest back-feed breaker possible on this home is...
10 kW
40A
200A
240A
A solar integrator company wants to install a PV system on a home with: a 250A service panel and a 225A main breaker. If they use an inverter with 97% efficiency and 120V output, what is the largest system they can install per NEC?
9.0 kW
7.2 kW
75A
6 kW
2 series strings of 8 panel each are connected in parallel. Vmp = 44.2 VDC Imp = 9.5A
Calculations show the fuses in the combiner box should be rated at...
9.5A
11.9A
14.8a
29.6A
3 series strings of 6 panel each are connected in parallel. Vmp = 44.2 VDC Imp = 9.5A
Calculations show the fuses in the dc disconnect should be rated at...
11.9A
14.8A
44.5A
35.6A
2 series strings of 8 panel each are connected in parallel. Vmp = 44.2 VDC Imp = 9.5A
The conductors from the combiner box to the DC disconnect are in a conduit that is raised 4" off the roof and the highest ambient temperature is expected to be 36 degrees C. The conductor size should be...
14 AWG
12 AWG
10 AWG
8AWG
NEC allows colored tape on what size wire?
AWG 8 or thicker
AWG 4 or thicker
AWG 00 only
Colored tape is not allowed
All grounding for PV systems is covered in NEC...
Article 690 only
Article 250 only
Article 690 and 250
Article "G"
Per NEC, AFCI is now required on systems 80 VDC or above.
AFCI stands for...
Anti-Fault Control Initiator
Amp Frequency Circuit Integrator
Arc Free Control Interceptor
Arc Fault Circuit Interrupter
Per NEC, rapid shutdown of PV systems is needed. This means...
Conductor should have no more than 80 VDC after initiation of RSS
Inverters must rapidly shutdown whenever the grid is out
Entire PV system should shut down in case of lightning storms
The current of the system should decrease by 50% upon initiation of RSS
