Quiz: Grounding I-A & B

If a 100-ampere non-time delay fuse is installed as a branch-circuit short-circuit and ground-fault protective device for a 20 - horsepower, 480 volt, 3 phase motor, what is the minimum size required for a copper wire-type equipment grounding conductor? Answer: _______________

# 8 = 100 amps Equipment grounding conductor table

Where necessary to comply with the performance requirements in Section 250.4(A)(5) or (B)(4), wire-type equipment grounding conductors shall not be smaller than the sizes provided in Table _______ Answer ___________

350.122

Which part of NEC Article 250 covers the specific requirements for grounding electrical systems over 1,000 bolts? Answer _____________

Article 10 or X

The Equipment grounding conductor of nonmetallic sheathed cable is required to be insulated, covered or __________ Answer ________

Bare

__________ Connected to establish electrical continuity and conductivity.

Bonded

A ______________ in its simplest form, is two conductors separated by insulation.

Capacitator

The Term ______ _______ as defined in Article 100 refers to conductive objects and describes the primary function of a grounding electrode.

Grounding electrode

Lower _____________ in a circuit results in higher current in the circuit.

Impedance

The grounded conductor is typically connected to the service disconnecting means enclosure using a ______ bonding jumper. Answer _________

Main

Capacitive reactance, inductive reactance, and _________ are components of the total impedance in what AC circuit? Answer ___________

Resistance

The grounding electrode conductor connection for a service can be made at the load end of the service drop, at the end of the service lateral, an most commonly _________ equipment enclosure. Answer ________-

Service

A conductor installed on the supply side-side of a service or separately derived system to ensure the required electrical conductivity between metal parts required to be electrically connected defines a (n) _________? Answer __________ - __________ Bonding Jumper

Supply Side

Which of the following is not permitted as identification means for grounded conductors installed at services? a. Green b. White

a. Green

Which of the following conductors is not permitted to be identified using green or green with one or more yellow stripes? a. Grounded or ungrounded conductors b. Grounding electrode conductors c. Equipment grounding conductors

a. Grounded or ungrounded conductors

For a service supplied by a solidly grounded system, the NEC requires a grounded conductor to be routed with the undergrounded service conductors to the service disconnecting means, connected to the service disconnecting means enclosure, and ultimately connected to the Earth through a grounding electrode conductor. a. True b. False

a. True

In a grounded electrical system, the grounded conductor of the system is forced to take on the same potential as the ground (Earth). a. True b. False

a. True

Isolated grounding-type receptacles identified with an orange triangle are only permitted to be used on branch circuits in accordance with 250.146(D). a. True b. False

a. True

Where a service is supplied by a ________ system, the grounded conductor is required to be routed and connected to the service disconnecting means enclosure. a. grounded b. ungrounded

a. grounded

In a grounded system, equipment grounding is accomplished through the required connection of the feeder or branch circuit equipment grounding conductor(s) to _________ and the grounding electrode conductor. a. grounded service conductor b. grounding electrode c. ungrounded service conductor

a. grounded service conductor

Where the grounding electrode for a building is metal underground water pipe electrode, what is the minimum size copper grounding electrode conductor tap taht is extended from the common grounding electrode conductor to a service discconect that is supplied by 500 kcmil copper service-entracne conductors? a. 2 AWG b. 1/0 c. 2/0 AWG

b. 1/0 AWG Table 250.66

Where equipment that fastened in place and installed greater than _______ vertically or greater than 5' horizontally of ground or grounded metal objects and not subject to contact by person, grounding is not required. a. 6' b. 8' c. 10'

b. 8'

Metal components such as metal elbows encased in not less than 12 inches of concrete and isolated from contact by people are not required to be grounded. a. True b. False

b. False

The grounded (usually the neutral) conductor must generally be kept seperated (insulated) from ground and ground metal parts in a disconnect on the load side of eh service disconnect, in a panelboard on the load side of teh service disconnect, in the service disconnecting means enclosure on the load side of the main overcurrent device, and in a meter socket enclosure on the supply-side of the service disconnecting means enclosure. a. True b. False

b. False

Copper or copper-clad Aluminum grounding electrode conductors are permitted to be installed closer than 18" of the Earth where installed in the bottom of the electrical enclosure that is listed for the enviroment. a. True b. False

b. False (take away copper and copper clad to make it true)

Which is the section of the NEC provides performance provisions that clarify what electrical grounding and bonding are intended to accomplish? a. Section 250.1 b. Section 250.4 c. Section 250.90

b. Section 250.4

The electrical service and system grounding electrode(s) provide the ______ for an electrical wiring systems within a building structure. a. overcurrent protection b. foundation c. platform

b. foundation

Where the grounding contacts of receptacles furnished as part of the equipment are bonding to the equipment, the grounded conductor is permitted to be used for ___________ existing ranges and dryers under the following conditions: * The grounded conductor is insulated, or the grounded conductor is uninsulated and part of Type SE service-entrance cable and the branch circuit originates at the service equipment * The grounded conductor is not smaller than 10 AWG copper or 8 AWG aluminum * The supply circuit is 120/240 - volt, single-phase, 3 wire; or 208/120 volt derived from a 3 phase, 4 wire, wye connected system. a. Shorting b. grounding c. a pull string

b. grounding

The _________ _________ conductor connects the grounded electrical system supplying the service, the grounded service conductor, and the service equipment enclosure. a. equipment grounding b. grounding electrode c. bonding jumper

b. grounding electrode

What is the minimum size required for wire-type aluminum or copper-clad aluminum common grounding electrode conductor installed for multiple seperately derived systems in the building? a. 6 AWG copper b. 3/0 AWG c. 250 kcmil

c. 250 kcmil

For other than within patient care vicinity, if an isolated /insulated equipment grounding conductor is installed with a brand circuit, what is the minimum number of equipment grounding conductor paths required to be installed in a health care facility requiring redundant grounding. a. 1 b. 2 c. 3

c. 3

The grounding electrode conductor connection for a service must be made in a _______ location a. dry b. protected c. accessible

c. accessible

The Code generally requires a (n) _________ to be installed from a grounded metal box to the grounding terminal on a grounding-type receptacle. a. system bonding jumper b. supply-side bonding jumper c. equipment bonding jumper

c. equipment bonding jumper

All conductors of an AC circuit are generally required to be installed together in the same raceway, cable, or trench. This requirement also includes the _______ of the circuit. a. grounding electrode conductor b. system bonding jumper c. equipment grounding conductor

c. equipment grounding conductor

A ground ring electrode must meet which of the following? a. It must be a minimum of 2 AWG copper. b. It must be buried not less than 30" deep. c. It must encircled the building or structure. d. All the above.

d. All the above

Equipment grounding conductor terminations on devices such as receptacles must be identified using which of the following means? a. A green pressure wire connector b. A green screw with a hexagon head that is not easily removed from the device. c. The words green and ground, the letters G or GR, a grounding symbol, or otherwise identified by a distinctive green color d. All the above

d. All the above

The grounding of which of the following shall be installed and arranged in a manner that will prevent objectionable current? a. Grounding of conductive normally noncurrent-carrying metal parts of equipment. b. Grounding of electrical systems of circuit conductors c. Grounding of surge arresters and surge-protective devices d. All the above

d. All the above