-
1When a solar PV system is connected to a residential load center via a backfeed breaker, NEC 705.12 states that the sum of the main breaker rating and the PV backfeed breaker rating must not exceed _____ percent of the panelboard busbar rating.
-
2Per NEC 690.8, PV source circuit conductors must be sized at a minimum of _____ percent of the module’s rated short-circuit current (Isc).
-
3A homeowner uses 600 kWh per month. The site receives an average of 5 peak sun hours per day. Assuming 80% system efficiency, what is the minimum DC system size needed to fully offset the monthly usage?
-
4In one- and two-family dwellings, PV source circuits and PV output circuits that do not include fixtures or receptacles may have a maximum system voltage of:
-
5NEC 690.12 requires that PV system conductors outside the array boundary be reduced to _____ volts or less within 30 seconds of initiating rapid shutdown.
-
6Which inverter topology converts DC from a single PV module directly to AC, allowing each module to operate at its own maximum power point independently?
-
7A California C-46 Solar contractor license authorizes the licensee to install:
-
8Per NEC 690.13, the disconnecting means for a PV system must be:
-
9The primary purpose of the ground-fault protection required by NEC 690.5 for grounded PV arrays is to:
-
10A PV module has an open-circuit voltage (Voc) of 44.0 V at STC (25°C) and a Voc temperature coefficient of −0.30%/°C. At the site’s lowest expected temperature of −10°C, what is the corrected Voc used for maximum string voltage calculations?
