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TL;DR

Study renewable energy system installation requirements including photovoltaic arrays. Solar installations are a growing field with specific NEC requirements.

By Valenke Exam Prep Team·Last updated 2026-06-03

Free Solar PV Systems (Art. 690) Practice Questions

Master Electrician License Exam · Advanced NEC

This module covers Solar PV Systems (Art. 690) as part of the Advanced NEC section, testing your understanding of core concepts and their practical application.

ExamMaster Electrician License Exam
Pass Rate45%
Duration300 minutes
ModuleSolar PV Systems (Art. 690)

Why Solar PV Systems (Art. 690) matters

Solar PV Systems (Art. 690) is a commonly tested topic on the Master Electrician License Exam because it covers fundamental knowledge required for competent professional practice.

Sample Practice Questions (5)

1. A rooftop PV array has 12 modules in series per string, each rated at 40.5 Voc (open-circuit voltage) at STC. The lowest expected ambient temperature is -15°C, giving a temperature correction factor of 1.12. What is the maximum system voltage?

  • 544.3 V
  • 486.0 V
  • 40.5 V
  • 607.2 V

2. A PV inverter output is connected to a 200A panelboard busbar using the supply-side connection method per NEC 705.12(A). The maximum size of the PV overcurrent device on the busbar is:

  • Not limited by the 120% rule; it connects on the supply side of the main overcurrent device
  • 40 amps (200 × 0.20)
  • 200 amps
  • 160 amps (200 × 0.80)

3. Per NEC 690.9(B), the maximum rating of an overcurrent device for a PV source circuit is:

  • The value marked on the PV module (series fuse rating) or per manufacturer's instructions
  • 125% of Isc multiplied by 125% (156% of Isc)
  • 200% of the module short-circuit current in all cases
  • The same as the inverter input current rating

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4. A PV system uses the load-side connection method per NEC 705.12(B)(2)(3)(b) on a 200A busbar panel with a 200A main breaker. The maximum PV backfed breaker size using the 120% rule is:

  • 40 amps
  • 80 amps
  • 200 amps
  • 60 amps

5. Per NEC 690.12, the rapid shutdown system for a building-mounted PV system must reduce conductors within the array boundary to no more than what voltage within 30 seconds of rapid shutdown initiation?

  • 80 volts
  • 30 volts
  • 120 volts
  • 0 volts

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Frequently Asked Questions

How many Solar PV Systems (Art. 690) questions are on the Master Electrician License Exam?▼
The Advanced NEC section, which includes Solar PV Systems (Art. 690), typically represents a significant portion of the exam. Focus on understanding core concepts rather than memorizing exact question counts, as the exam uses adaptive testing.
What is the best way to study Solar PV Systems (Art. 690)?▼
Use active recall and spaced repetition rather than passive reading. Practice with realistic exam questions, review explanations for both correct and incorrect answers, and focus on understanding the reasoning behind each concept.
What topics within Solar PV Systems (Art. 690) should I focus on most?▼
Focus on the concepts that appear in our practice questions and any areas where you consistently score below 70%. The adaptive practice mode will automatically target your weak areas for efficient study.