Nabcep practice exam - Study guides, Class notes & Summaries

An off-grid installation has a 1HP pump that is on 10% of the time and a 20W light that is on 100% of the time. What is the monthly energy use? - ANSWER-68KWh 1HP = 746W 746W * 0.1 * 24hours * 30days = 53712Wh 20W * 24hrs * 30days = 14400Wh 14400 + 53712 = 68112Wh 68kWh What kind of ground faults do most inverters detect? - ANSWER-DC Inverters detect dc ground faults. AC ground faults are detected on the AC side of the inverter at the distribution paned (MSP, load center). Most inverter...

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what kind of ground faults do most inverters detect? voltage m voltage c.AC d.DC - ANS - D. Inverters detect dc ground faults(when positive in contact with ground wire)in most inverters. Current carrying ability of a conductor(wire)is called. a.Ampacity b. Amps c. inductance d. insolation - ANS - A. Current carrying ability is ampacit

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If an array is facing south at equinox at noon, what must the tilt angle be in order for the array to face directly at the sun at latitude 30? - ANS - A. 33 degrees B. 48 degrees C. 18 degrees D. 30 degrees The temperature rating of the insulation of a conductor when designing a PV system effects the - ANS - A. ability of the wire to withstand fire B. ability of the wire to withstand smoke C. ability of the wire to carry current D. ability of the wire to withstand physical damag When a...

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An off-grid installation has a 1HP pump that is on 10% of the time and a 20W light that is on 100% of the time. What is the monthly energy use? - ANSWER-68KWh 1HP = 746W 746W * 0.1 * 24hours * 30days = 53712Wh 20W * 24hrs * 30days = 14400Wh 14400 + 53712 = 68112Wh 68kWh What kind of ground faults do most inverters detect? - ANSWER-DC Inverters detect dc ground faults. AC ground faults are detected on the AC side of the inverter at the distribution paned (MSP, load center). Most inverter...

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what kind of ground faults do most inverters detect? voltage m voltage c.AC d.DC - ANS - D. Inverters detect dc ground faults(when positive in contact with ground wire)in most inverters. Current carrying ability of a conductor(wire)is called. a.Ampacity b. Amps c. inductance d. insolation - ANS - A. Current carrying ability is ampacity According to ohms law and voltage drop, the relationship between voltage and current is. a. Proportional b.Inversely proportional c.Directly invers...