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Q1When reviewing local authority having jurisdiction (AHJ) requirements for a commercial PV installation, which of the following would typically be the MOST important to consider first?
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✓ Correct answer: Setback requirements from the building code
Setback requirements from the building code are crucial to consider early in the design phase as they directly impact where PV equipment can be placed and may significantly constrain system size and configuration.
Q2Which section of the 2017 NEC specifically addresses solar photovoltaic systems?
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✓ Correct answer: Article 690
Article 690 of the National Electrical Code (NEC) is dedicated specifically to solar photovoltaic systems and contains the requirements for installation, operation, and maintenance of these systems.
Q3When reviewing utility interconnection requirements, which of the following is typically required for grid-connected PV systems?
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✓ Correct answer: External disconnect switch
An external disconnect switch is typically required by utilities to allow them to isolate the PV system from the grid during maintenance or emergency situations.
Q4A homeowners association (HOA) covenant restricts roof-mounted solar equipment visibility from the street. Which design approach would best address this requirement?
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✓ Correct answer: Place the array on the rear-facing roof slope
Placing the array on the rear-facing roof slope would typically make it less visible from the street, helping comply with HOA visibility restrictions while still allowing for solar installation.
Q5According to the 2017 NEC, what is the required minimum clear space in front of electrical equipment operating at 600V or less?
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✓ Correct answer: 36 inches
NEC 110.26(A)(1) requires a minimum working space of 3 feet (36 inches) in front of electrical equipment operating at 600V or less to ensure safe access for installation and maintenance.
Q6When reviewing project criteria for a new PV installation, which document would contain the specific structural requirements for roof loading?
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✓ Correct answer: Structural engineering report
Structural engineering reports contain the analysis of roof loading capacity, which is critical for determining if the roof can support the additional weight of a PV system.
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