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Electrical
NABCEP PV Associate Certification
Grid Interconnection & Commissioning
Vérification des connaissances
Grid Interconnection & Commissioning
Vérification des connaissances
Vérification des connaissances
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The NEC 120% rule for PV backfeed interconnection at a load-side panelboard means
A
The PV system may supply 120% more than the panel's rated load
B
The PV breaker must be rated 20% larger than the inverter output current
C
The sum of the main breaker and PV backfeed breaker ratings must not exceed 120% of the bus rating
D
The PV system can export up to 120% of annual energy consumption
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