Question 1 of 10
What is the primary function of the Equipment Grounding Conductor (EGC)?
The EGC is a safety measure designed to prevent dangerous voltages on metal enclosures.
Question 2 of 10
According to NEC, what is the only location where the neutral and EGC should be bonded together?
Bonding at multiple locations creates parallel paths for current and can lead to ground loops.
Question 3 of 10
What is the primary factor used to determine the size of the EGC?
The EGC must be sized to handle the fault current that can flow under the protection of the OCPD.
Question 4 of 10
Which of the following raceways is generally permitted to serve as an EGC?
RMC is a recognized grounding means, whereas FMC has length limitations and PVC is non-conductive.
Question 5 of 10
If the hot wires are upsized for voltage drop, what must happen to the EGC?
To maintain proper protection, the EGC must be increased in size along with the hot wires when voltage drop considerations necessitate it.
Question 6 of 10
In a parallel conductor installation, where multiple conduits are run, where must the EGC be installed?
Each raceway in a parallel conductor system must contain a full-size EGC.
Question 7 of 10
What is the minimum size of EGC that must be physically protected by a raceway or cable armor?
EGCs smaller than 6 AWG require physical protection.
Question 8 of 10
Aluminum EGCs are generally NOT permitted to be installed in direct contact with what?
Aluminum corrodes when in contact with concrete or earth.
Question 9 of 10
According to the article, what is the required EGC size for a 60-Amp circuit breaker, using a copper conductor?
Referencing the NEC table 250.122; for a 60-Amp circuit breaker, a 10 AWG copper EGC is required.
Question 10 of 10
If a circuit uses Flexible Metal Conduit (Flex) and the circuit is rated over 20 Amps, and the Flex length is 7 feet, what is required?
When flex length is greater than 6ft and the circuit is over 20A, the flex cannot be the EGC. Therefore, a separate wire is required.
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