Shining a Light on Solar Power
All Answers relate to NFPA 70, 2017 Edition
1. Requirements for Solar Voltaic Systems can be found in ____________
A. NFPA 70 – Article 706
B. NFPA 72 – Chapter 685
C. NFPA 101 – Section 100
D. NFPA 70 – Article 690
2. Only qualified persons shall perform _______.
A. the installation of two or more electrical power production sources operating in series with a primary source(s) of power
B. the installation of one or more electrical power production sources operating in parallel with a primary source(s) of power
C. the installation of two or more electrical power production sources operating in parallel with a primary source(s) of power
D. the installation of one or more electrical power production sources operating in series with a primary source(s) of power
NFPA 70, 2020, 705.8
3. The requirements of Article 690 pertaining to PV source circuits shall apply to AC modules or AC module systems.
A. True
B. False
4. PV systems DC circuits on or in one- and two-family dwellings shall be permitted to have a maximum voltage of _______ volts.
A. 240
B. 300
C. 600
D. 1000
NFPA 70, 2020, 690.7
5. Disconnecting means of a PV system shall be appropriately marked. In addition to the requirements of 690.13(B), the labels shall comply with __________.
A. 110.21 (A)
B. 110.21 (B)
C. 110.21 (C)
D. 110.21 (B) & (C)
E. all of the requirements of section 110.21
6. The PV system disconnecting means or its remote operating device or the enclosure providing access to the disconnecting means shall be capable of being locked in accordance with __________.
A. 110.21
B. 90.6
C. 690.10
D. 110.25
7. Which of the following is not a requirement of marking and labeling for wiring methods and enclosures that contain PV system DC circuit conductors?
A. Exposed raceways, cable trays, and other wiring methods
B. Covers or enclosures of pull boxes and junction boxes
C. Conduit bodies in which any of the available conduit openings are unused
D. Buried underground raceways and raceways encased in concrete
8. PV systems DC circuits that exceed ______ shall be provided with DC ground-fault protection meeting the requirements of 690.41(B)(1) and (B)(2) to reduce fire hazards.
A. 30 volts or 8 amperes
B. 57 volts and 15 amperes
C. 12 volts and 12 amperes
D. 600 volts and 20 amperes
NFPA 70, 2020, 690.41 (B)
9. All electrical equipment shall be approved for installation by one of the following except ___________.
A. listing and labeling
B. be evaluated for the application and have a field label applied
C. approved by the AHJ
D. where products complying with 691.5(1) or (2) are not available, by engineering review validating that the electrical equipment is evaluated and tested to relevant standards or industry practice
NFPA 70, 2020, 691.5
Calculate This
Using the appropriate table from the NEC, what is the maximum PV source circuit voltage for 18 modules that are each rated Voc 23, at an ambient termperature of 14 degrees Farenheit?
Click here to see the answer.
Answer to: Calculate This
PV Voc = 23x1.14x18
PV Voc = 471.96
