Regulatory Compliance Flashcards
7 cards from real SE ENGR. practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Regulatory Compliance flashcards as text
Under NEC 690.12, conductors outside the array boundary must be reduced to what voltage within 30 seconds of rapid shutdown initiation?
Answer: 30 V
NEC 690.12 requires controlled conductors outside the array boundary to drop to 30 V or less within 30 seconds.
How far does the NEC define the array boundary to extend from the PV array in all directions for rapid shutdown purposes?
Answer: 1 ft
The array boundary is defined as 305 mm (1 ft) from the array in all directions.
Under NEC 690.7, what is the maximum PV system DC voltage permitted on one- and two-family dwellings?
Answer: 600 V
NEC 690.7 limits PV DC circuits on one- and two-family dwellings to 600 V.
Which standard defines the interconnection and interoperability requirements that UL 1741 SB tests inverters against?
Answer: IEEE 1547-2018
UL 1741 SB certifies inverters to the requirements of IEEE 1547-2018 using IEEE 1547.1-2020 test procedures.
Using the 120% rule, what is the maximum PV inverter breaker allowed on a 200 A busbar with a 200 A main breaker, with the PV breaker at the opposite end?
Answer: 40 A
1.2 × 200 A = 240 A, minus the 200 A main leaves 40 A for the PV breaker.
Which code body publishes the National Electrical Code that states and local jurisdictions adopt?
Answer: NFPA
The NEC is NFPA 70, published by the National Fire Protection Association.
Who has final authority to approve a PV installation's compliance with adopted codes in a given jurisdiction?
Answer: The Authority Having Jurisdiction (AHJ)
The AHJ interprets and enforces adopted codes and approves installations through permits and inspections.