Question 1

At least one of the insulating ____ must be removed from receptacles that do not have a contact yoke or device that complies with 250.146(B) (self-grounding type) to ensure direct metal-to-metal contact.

A) nuts
B) wires
C) washers
D) screws

C

Accepted Answer

Washers must be removed to ensure direct metal-to-metal contact for grounding purposes, as specified in electrical codes and standards.

Question 2

The equipment grounding conductor of a grounding-type receptacle or a branch-circuit extension is permitted to be connected to any accessible point on the grounding electrode conductor.

Accepted Answer

According to NEC 250.130(C), the equipment grounding conductor of a grounding-type receptacle or a branch-circuit extension is permitted to be connected to any accessible point on the grounding electrode conductor.

Question 3

The grounded circuit (system) conductor is generally not permitted to be used to ground equipment on the load side of the service.

Accepted Answer

The grounded circuit conductor (often called the neutral) is only allowed to be used for grounding equipment on the supply (source) side of the service, not on the load side. This is because the neutrality of the conductor cannot be guaranteed once it enters the load side, as it may carry current in normal operation. This is to protect people from electric shock and ensure proper operation of the electrical system.

Question 4

The connection method from the equipment grounding conductor to the box is carefully controlled.The most common methods utilized for boxes are: (1) a(n) ____________________ that meets the rules, and (2) a listed grounding device such as a ground clip.

Accepted Answer

The answer of The connection method from the equipment grounding...

Question 5

Basically, ____________________ receptacles are required to be installed if an equipment grounding conductor is available at the outlet where the receptacle is located.

Accepted Answer

The answer of Basically, ____________________ receptacles are required to be...

Question 6

It is common to install ____ receptacles for personal computers and peripherals such as printers and scanners, as well as for cash registers and terminals.&#10;A) networked&#10;B) branched&#10;C) floor&#10;D) isolated-ground

Accepted Answer

Isolated-ground receptacles are designed to minimize electrical noise and provide a dedicated ground for sensitive electronic equipment, making them ideal for personal computers, printers, and scanners, as well as cash registers and terminals. Networked and branched receptacles are not specific to electronic equipment, and floor receptacles may not provide the necessary grounding.

Question 7

If a grounding means does not exist in an electrical outlet, a nongrounding-type receptacle can be replaced with a GFCI device, but it must be marked as &#34;____.&#34;&#10;A) GFCI Protected&#10;B) No Grounding Protection&#10;C) Externally Grounded&#10;D) Nongrounding GFCI

Accepted Answer

When replacing a nongrounding-type receptacle with a GFCI device, it must be marked as "GFCI Protected" to indicate that although there is no grounding available, the circuit is protected by a GFCI device. This ensures that anyone using the outlet is aware of the limitations and the need for caution.

Question 8

For plug-in type appliances, the receptacles and pigtails must be ____ with ground.&#10;A) 2-pole&#10;B) 3-pole&#10;C) 4-pole&#10;D) 5-pole

Accepted Answer

For plug-in type appliances, the receptacles and pigtails must be 3-pole with ground. The three poles are the hot, neutral, and ground. The ground is important for safety and helps to protect against electrical shock.

Question 9

If a metal rack is properly grounded, the equipment that is mounted on the rack and in good electrical contact with it is considered to be grounded.

Accepted Answer

When a metal rack is properly grounded, it provides a path for any electrical current that may be present, allowing the current to flow harmlessly to the ground instead of through any attached equipment. Therefore, any equipment mounted on the grounded rack and in good electrical contact with it is also considered to be grounded, as the current will flow through the rack and into the ground, bypassing the equipment.

Question 10

For grounded systems, the ____ for the service and the system bonding jumper for separately derived systems provide the critical link between the equipment grounding conductor and the grounded system conductor.

A) service transformer
B) main bonding jumper
C) current transformer
D) grounding electrode

Accepted Answer

The main bonding jumper is the critical link for both grounded and separately derived systems. In grounded systems, it connects the equipment grounding conductor to the grounded conductor (neutral) at the service disconnect. In separately derived systems, it connects the equipment grounding conductor to the system bonding jumper, which in turn connects the grounded conductor of the separately derived system to the grounding electrode system. The service transformer, current transformer, and grounding electrode are all important components of a grounding system, but they are not the critical link for the equipment grounding conductor.

Deck 7: Methods of Equipment Grounding