NR 706 STUDY GUIDE 2026 ACTUAL
QUESTIONS WITH SOLUTIONS GRADED A+
● If something changes in a PV system, what must you immediately
evaluate? Answer: Which NEC article applies, labeling changes,
disconnects, voltage limits, life-safety impact
● What NEC article governs PV systems? Answer: NEC 690
● What NEC article governs grid interconnection and backfeeding?
Answer: NEC 705
● What NEC article governs batteries and energy storage systems?
Answer: NEC 706
● What NEC article is used when equipment must follow manufacturer
instructions? Answer: NEC 110.3(B)
● What NEC article governs grounding and bonding? Answer: NEC 250
● PV system on a one- or two-family dwelling — max DC voltage
allowed? Answer: 600 V DC (NEC 690.7)
, ● PV system on a non-dwelling or commercial building — max DC
voltage allowed? Answer: 1000 V DC (NEC 690.7)
● PV DC equipment not on or in a building — what voltage is allowed?
Answer: Up to 1500 V DC (NEC 690.7)
● PV DC equipment ≤1500 V, listed, labeled, not on a building — what
code no longer applies? Answer: Article 490 does not apply
● Equipment moves from ground-mounted to building-mounted — what
changes? Answer: Rapid shutdown applies (690.12) and labeling
(690.56)
● What NEC section governs rapid shutdown? Answer: NEC 690.12
● If rapid shutdown exists, what else must exist? Answer: Rapid
shutdown labeling per NEC 690.56
● Rapid shutdown device present but labeling missing — pass or fail?
Answer: Fail
● Does rapid shutdown apply only to rooftop arrays? Answer: No, it
applies to most building-mounted PV systems
QUESTIONS WITH SOLUTIONS GRADED A+
● If something changes in a PV system, what must you immediately
evaluate? Answer: Which NEC article applies, labeling changes,
disconnects, voltage limits, life-safety impact
● What NEC article governs PV systems? Answer: NEC 690
● What NEC article governs grid interconnection and backfeeding?
Answer: NEC 705
● What NEC article governs batteries and energy storage systems?
Answer: NEC 706
● What NEC article is used when equipment must follow manufacturer
instructions? Answer: NEC 110.3(B)
● What NEC article governs grounding and bonding? Answer: NEC 250
● PV system on a one- or two-family dwelling — max DC voltage
allowed? Answer: 600 V DC (NEC 690.7)
, ● PV system on a non-dwelling or commercial building — max DC
voltage allowed? Answer: 1000 V DC (NEC 690.7)
● PV DC equipment not on or in a building — what voltage is allowed?
Answer: Up to 1500 V DC (NEC 690.7)
● PV DC equipment ≤1500 V, listed, labeled, not on a building — what
code no longer applies? Answer: Article 490 does not apply
● Equipment moves from ground-mounted to building-mounted — what
changes? Answer: Rapid shutdown applies (690.12) and labeling
(690.56)
● What NEC section governs rapid shutdown? Answer: NEC 690.12
● If rapid shutdown exists, what else must exist? Answer: Rapid
shutdown labeling per NEC 690.56
● Rapid shutdown device present but labeling missing — pass or fail?
Answer: Fail
● Does rapid shutdown apply only to rooftop arrays? Answer: No, it
applies to most building-mounted PV systems
