Does the ground wire have to be the same size as the conductor?

In household wiring the ground should be of the same size as the circuit conductors. In industry, commonly motors and heaters will use one size smaller as in case of a short, grounding will trip the breaker or fuse before the wire heats significantly.

What is the difference between the grounded conductor and the grounding conductor?

A grounded wire is required by the National Electrical Code to be white or gray in color on the customer side of the meter. Grounded wires on the utility side of the system do not generally have insulation. A “grounding” wire on the other hand is a safety wire that has intentionally been connected to earth.

What is the difference between EGC and GEC?

Each of these are sized completely different. EGC’s are sized from Table 250.122 based on the size of the overcurrent device ahead of the circuit. The GEC is sized from Table 250.66 based on the size of the ungrounded service entrance conductors.

How big does the ground wire need to be?

16-gauge
Even without AFCI breakers, the 16-gauge ground wire should be adequate in most instances to clear a short, a fault, or an overload.

When determining the number of current-carrying conductors a grounding or bonding conductor shall not be counted when applying?

In accordance with 310.15(B)(6), a grounding or bonding conductor shall not be counted when applying the provisions of 310.15(B)(3)(a). The adjustment factor for six current-carrying conductors is 80 percent. Now multiply 115A by 0.80 (115 0.80 = 92).

Which of the following is not permitted to serve as an equipment grounding conductor?

Flexible metal conduit is never allowed as an equipment grounding conductor when flexibility is necessary after installation.

Is ground a current-carrying conductor?

Section 310.15(F) states that a grounding or bonding conductor (typically bare or green in color) is never counted as a current-carrying conductor.

Which circuit shall not be grounded?

Secondary circuits of low-voltage lighting system must not be grounded, as indicated in Section 411.5(A). Also, low-voltage lighting systems for underwater pool lighting supplied by isolation transformers must not be grounded.

Which type of system is required to be grounded?

Systems less than 50 volts have to be grounded, where supplied by a transformer that is supplied (on the primary side) by greater than 150 volts. 2. Systems less than 50 volts have to be grounded, where supplied by a transformer, if the transformer is supplied (on the primary side) by an ungrounded electrical system.