Question 1 of 10
What is the primary function of grounding as defined in the article?
Grounding is defined as connecting an electrical system to the earth via a grounding electrode to stabilize voltage and clear faults.
Question 2 of 10
What is the primary objective of 'Bonding'?
Bonding connects metal parts together to ensure that if a fault occurs, electricity has a low-resistance path to the source, ensuring the breaker trips.
Question 3 of 10
Which of the following is considered an approved grounding electrode under NEC 250?
The article lists concrete-encased electrodes (Ufer grounds), metal water pipes, building steel, and ground rings as approved grounding electrodes.
Question 4 of 10
What conductor connects the grounding electrode back to the service neutral?
The Grounding Electrode Conductor (GEC) is the conductor used to connect the system or equipment to the grounding electrode.
Question 5 of 10
Why is bonding critical when transferring flammable liquids?
Bonding connects containers to equalize charge, preventing static sparks that could ignite flammable vapors.
Question 6 of 10
What is the purpose of an Equipment Grounding Conductor (EGC)?
The EGC, while often confused with grounding, primarily performs bonding by connecting non-current carrying metal parts to ensure fault clearance.
Question 7 of 10
What happens if a system lacks proper bonding and grounding during a fault?
Without proper grounding and bonding, fault currents may not find a return path, causing the protective device to fail to trip, creating a fire or shock hazard.
Question 8 of 10
What does the NEC refer to when discussing the 'connection between parts'?
The article distinguishes grounding as the 'connection to earth' and bonding as the 'connection between parts'.
Question 9 of 10
Which of these is NOT an example of bonding in practice?
The GEC is part of the grounding system, whereas bonding jumpers, bushings, and conduit systems are part of the bonding system.
Question 10 of 10
The primary goal of creating a 'low-impedance path' via bonding is to:
A low-impedance path ensures that in the event of a fault, the current is high enough to cause the overcurrent protective device (OCPD) to trip immediately.
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