Code Hunter: Alternative Energy, NEC-2020

Test your NEC code knowledge by taking this quiz on alternative energy requirements in the 2020 NEC.

1. A device that uses power electronics to convert one form of electrical power into another form of electrical power is known as a(n) ___.


2. An energy storage system installed in a one- or two-family dwelling shall not exceed ______ volts between conductors unless live parts are inaccessible during routine maintenance.


3. Article __________ covers power production sources that operate in parallel with a primary source of electricity.


4. The dc conductors of a PV system shall not occupy the same __________ as PV system ac conductors unless separated by a barrier or partition.


5. If a dc microgrid is connected through an inverter or bi-directional converter with an ac source, the installation must comply with Article _________.


6. For a PV system, the rapid shutdown for conductors inside the array boundary must limit the voltage to not more than __________ volts within 30 seconds of the shutdown initiation.


7. A(n) __________ shall be installed between a wind-electric system and any loads served by the premises wiring system.


8. The location of the manual fuel shut-off valve for a fuel cell must be marked at the location of the __________ for the building or circuits supplied.


9. Power to a premises wiring system fed by a stand-alone system shall be permitted to have less capacity than the _____ load.


10. For large-scale PV installations (5,000 kW or more), buildings whose sole purpose is to house supply station equipment shall _______ comply with 690.12 for rapid shutdown systems.


11. If the dc circuit conductors of a PV system have sufficient ampacity for the maximum circuit current, do they require any overcurrent protection?


Christel Hunter
Christel Hunter is vice president of engineering for Cerro Wire. Chris is a senior associate member of IAEI and serves as President for the Southern Nevada Chapter of IAEI. Chris also serves on NEC CMP-6 and CMP-13, NFPA 921, NFPA 70B, NFPA 73 and UL STPs 62, 83, 719 and 4703. Chris is a Certified Standards Professional, Master Electrician, and LEED Accredited Professional.