Grounding

Question 1

A(n) _____________________ is used to establish a direct connection to the Earth.

Answer 1

grounding electrode

There are numerous types of grounding electrodes, such as rods, plates, rings, and concrete-encased electrodes. Regardless of the type, the grounding electrode’s purpose is to establish a low-resistance connection to ground, meaning the Earth.

Question 2

GEC stands for:

Answer 2

grounding electrode conductor

As defined in NEC Article 100, a Grounding Electrode Conductor (GEC) is “a conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system.”

Question 3

In order to meet National Electrical Code (NEC) requirements, the equipment grounding conductor ____________.

Answer 3

must be an effective, low resistance, electrically conductive path

The equipment grounding conductor must never be fused, switched, or interrupted in any fashion. It also must be a continuous conductive path, connected only at appropriate terminations and with the correct connectors. There are no requirements as to stranded or solid wire. The equipment grounding conductor must bond together all system components capable of conducting electricity, including all metal parts of system – from metal junction boxes and disconnects to equipment chassis and PV module frames. It should only connect to normally non-current-carrying parts of the system. The equipment grounding conductor insulation must be green or green with a yellow stripe, or be bare copper

Question 4

True or False: Equipment grounding is required on all non-current-carrying, exposed metal parts of a PV system – such as module frames, disconnects, and inverters etc. - that are likely to become energized in the event of a fault.

Answer 4

true

Equipment grounding is required on all non-current-carrying exposed metal parts of a PV system

Question 5

True or False: Under normal operating conditions, the equipment grounding conductor(s) will carry current

Answer 5

false

In a properly grounded system, the equipment grounding conductors do not normally carry current. In the event of a fault, these grounding wires provide a temporary, low-resistance path for fault currents

Question 6

The grounded conductor is a(n) _________________ that is intentionally connected to the grounding system at one point.

Answer 6

current-carrying conductor

The grounded conductor is a current-carrying conductor that is intentionally bonded to ground, as defined in NEC Article 100

Question 7

On the AC side of a 120/240 VAC split-phase residential PV system, the neutral conductor is the ______________ conductor

Answer 7

solidly grounded

The grounded conductor (the neutral conductor in a 120/240 VAC system) is solidly bonded to ground. The ungrounded conductor(s) on the AC side are the ‘hot’ Line 1 (L1) and Line 2 (L2) conductors

Question 8

The equipment grounding conductor is what color:

Answer 8

a bare copper or green wire

grounding conductors must always be bare copper or covered with green insulation. It also allows for green insulation with yellow stripes

Question 9

True or False: If a roof-mounted, negative functionally grounded PV array is located on a dwelling it does NOT typically need ground-fault protection

Answer 9

false

With only a few exceptions, the National Electrical Code (NEC) mandates the use of ground-fault protection on almost all PV systems – including those on dwellings. All grid-direct inverters used in residential applications offer built-in ground-fault protection

Question 10

Match the conductors labeled with numbers on the schematic with the correct terminology listed below (IMAGE)

Answer 10

study!