Grounding & Bonding Test

How are isolated grounding-type receptacles required to be identified?

The receptacle must have an orange triangle on the face of the receptacle

Type SEU cable that contains a bare conductor normally used for a grounded conductor of a circuit or service is permitted to supply which of the following?

a. A 240V water heater (single-phase, 2-wire)

Which of the following is not considered an acceptable grounding electrode for a building or structure?

a. A concrete-encased electrode with a plastic vapor barrier installed at the bottom

Which of the following is in the grounded electrical circuit, but is not an effective path for ground fault current?

a. Earth

A grounding electrode is an) ? object through which a direct connection to Earth is established.

a. conductive

An important characteristic of a grounding electrode is that it must have a(n) ? to ground (the Earth).

a. direct connection

The electrical service and system grounding electrode(s) provide the ? - for an electrical wiring system within a building structure.

a. foundation

Where equipment that is fastened in place and installed ? vertically or ? horizontally of ground or grounded metal objects and not subject to contact by persons, grounding is not required.

a. greater than 8' / greater than 5'

If the ungrounded service conductors are 1,000 kcmil copper (two 500 kcmil parallel copper conductors) and all are installed in tv separate raceways, what is the minimum siz required for a copper wire-type supply-side bonding jumper for each raceway?

b. 1 AWG

In a simple DC circuit if the voltage is 480 and the resistance is 20 ohms, how much current would be present in the circuit?

b. 24 A

What is the minimum size copper bonding conductor for an interior metal water piping system if the building is supplied by a service that has a large ungrounded service entrance conductor size of 2,500 kcmil?

b. 3/0

The bonding jumper installed between a power system grounding electrode and a separate electrode installed for a TV antenna system and equipment shall not be smaller than ?.

d. 6 AWG copper

Which of the following is not permitted as a grounding electrode for a building or structure service by an AC service?

d. All of the above

The equipment grounding conductor of nonmetallic sheathed cable is required to accordance with which of the following?

d. Any of the above

The main bonding jumper in listed service equipment is required to be made of which of the following materials?

d. Any of the above

The grounding electrode conductor connection for a service can be made at which of the following accessible locations?

d. Any of the above locations

All but which of the following conductors are connected together with the service equipment for a service supplied by an ungrounded system?

d. Main bonding jumper

Article 645 of the NEC provides requirements for information technology rooms and the provisions in this article can only be applied where all of the requirements in ? have been met.

d. Section 645.4

Which of the following is not suitable as an equipment grounding conductor?

d. Steel alloy Type MI cable

Which NEC table is used for determining the minimum sizes for wire-type equipment grounding conductors?

d. Table 250.122

In a grounded electrical system, the grounded conductor of the system is forced to take on ? the ground (Earth).

d. The same potential as

which of the following is not permitted to be used to identify the isolated/insulated equipment grounding conductor connected to an isolated ground receptacle?

d. White insulated conductor with one or more green stripes

panelso vis separat nonmetallic may or cable or where separate equipment dunding conductors are provided, a terminal air for the equid inside the ding conductors shall be secured inside the cabinet and it must be bonded to the cabinet and panelboard frame, if of metal; otherwise, it shall be connected to the ? that is run with the feeder conductors supplying the panelboard.

b. Equipment grounding conductor

Which NEC table is used for establishing the minimum size required for the grounded conductor for a service supplied from a grounded AC system?

b. Table 250.102(C)(1)

Metal-clad cable Type MC is also suitable for use as an EGC in accordance with all but which of the following?

b. The armor of the interlocking metal tape type of metal clad cable

When electrical systems or equipment are grounded, they are connected to the Earth either directly or through a conductive body that extends the ? connection.

b. ground

Where an ungrounded system is installed, non-current-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected together and to the supply system grounded equipment in a manner that creates a low-impedance path for? that is capable of carrying the maximum fault current likely to be imposed on it.

b. ground-fault current

Lower impedance in a circuit results in current in ? that circuit.

b. higher

What is the minimum size grounded conductor required for a service if the ungrounded service-entrance conductors are sized at 4/0 copper and the grounded conductor carries no load?

c. 2 AWG copper

For other than within patient care vicinity, if an isolated/insulated equipment grounding conductor is installed with a branch circuit, what is the minimum number of equipment grounding conductor paths required to be installed?

c. 3

What is the maximum size required for a grounding electrode conductor where it is only connected to a concrete-encased electrode?

c. 4 AWG copper

If the largest ungrounded service entrance conductor (copper) is 900 kcmil (three paralleled 300 kcmil conductors), what is the minimum size required for an aluminum or copper-clad aluminum wire-type main bonding jumper?

c. 4/0

What is the minimum size aluminum equipment bonding jumper required for a circuit protected by a 100-ampere overcurrent device?

c. 6 AWG

Objectionable current is often the result of connections between a(n) ? and ground or grounded metal parts on the load side of the service grounding point or the grounding poi for a separately derived system.

c. Grounded (usually the neutral conductor)

A conducting object through which a direct connection to Earth is established defines which of the following?

c. Grounding electrode

Which of the following is not a component of the total impedance in an AC circuit?

c. Power Factor

Which of the following nonmetallic raceways is recognized in the NEC for protection of grounding electrode conductors from physical damage?

c. Schedule 80 PVC

Which NEC table is used for sizing a wire-type main bonding jumper where a service is supplied from a grounded system?

c. Table 250.102(C)(1)

Which NEC table is used to establish the minimum size grounded conductor for a service supplied by a grounded system?

c. Table 250.102(C)(1)

A wire-type equipment grounding conductor must be sized to carry the maximum amount of available fault current, but in no case should the EGC be smaller than the minimum sizes provided in which NEC table?

c. Table 250.122