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NABCEP PV Installation Professional (PVIP) Board Certification Sample Questions:

1. When installing an ungrounded PV system with an open-circuit voltage of 450Vdc and a maximum voltage of
3000Vdc which procedures should be followed to establish an electrically safe condition?

A) Determine possible sources electrical supply an avoid exposure to energized conductors or parts.
B) Verify that disconnecting device blades are closed and test conductors using an adequately rated detector.
C) Mount inverters on nonconductive supports and temporarily ground one dc circuit conductor.
D) Apply lockout/tagout devices and install a listed isolation transformer.

2. A technician has been called to a scale due to a low-performing array. The technician will perform tests in the
24-source circuit combiner box. After putting on the correct PPE and turning off and performing lock.tagout of the inverted and combiner disconnect. Which is the next step to safely begin electrical testing in the combiner box?

A) Test for voltage on the positive out
B) Open all fuse holders in the combiner box.
C) Test for current on each source circuit coming into the combiner box.
D) Remove any surge suppression devices from the circuits.

3. A residential PV system uses two 120.240Vac utility-interactive inverters with a sealed lead-acid battery energy backup for protected loads. The MOST important protected load consideration when operating in the backup mode is that:

A) The peak current from the sealed lead- acid batteries must not exceed peak demand currents.
B) All protected loads are connected in multiwire branch circuits.
C) The stand-alone system configuration can adequately supply current to all protected load branch circuit.
D) The protected loads must have automatic restart function.

4. An installer was asked to provide a means to measure the voltage of each battery in a system. The bank is located 50 ft.
From the data logger. The installer will be using shielded. Twisted pairs of instrumentation wiring, all run in the bundle a conduct.
The signals are connected to isolated and ungrounded inputs at a data logger. Which safely precaution is MOST needed to protect the instrumentation wiring?

A) Each set of twisted pairs must be provided with properly rated fuses that are physically located at the battery.
B) The instrument wiring must be large (larger than # 18 AWG) to handle current from each battery and must be a double- insulated type.
C) Individual nonfused disconnects are required for each set of wiringbecause all of the signals must be isolated from each other.
D) An appropriately rated and sized of resistive elements for each twisted pair be located at, or very near to, the data logger terminals

5. Which is a requirement for designated battery rooms?

A) must be equipped withpanic hardware and open m the directionof egress.
B) Battery cabinets, racks, or trays must have a minimum clearance of 12 in. from any wall.
C) illumination shall be provided by lightingoutlets controlled by automated means only.
D) Gas pipe equipment must be constructed and installed for a Hazardous Class I location.

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