Grounding & Bonding Hootenany

What is the minimum size grounded conductor required for a service if the ungrounded service-entrance conductors are sized at 500-kcmil copper and the grounded conductor carries no load?

#1/0 - AWG

For a 30-ampere branch-circuit, the equipment grounding conductor from a grounded metal box to a grounding type receptacle must not be smaller than _____.

#10-AWG copper

If the ungrounded service conductors are 1,000-kcmil copper (two 500-kcmil copper conductors in parallel) and all are installed in the same auxiliary gutter, what is the minimum size required for a copper wire-type supply-side bonding jumper?

#2/0 - AWG

Where a feeder from an ungrounded system supplies a separate building or structure, the installation must meet which of the following requirements?

-It must include an equipment grounding conductor (EGC) as described in 250.118 -The EGC must also be connected to the required grounding electrode conductor -The EGC must be connected to the building or structure disconnecting means

The general requirements in the National Electrical Code are covered in chapter(s) _____ and apply to all installations.

1 through 4

Where listed nonmetallic conduit encloses a secondary circuit conductor from a neon transformer or power supply operating at 100-Hz. or less, and a bonding conductor is required, the bonding conductor shall be installed separate and remote from the nonmetallic conduit and be spaced at least _____-inch(es) from the conduit.

1.5

The maximum permitted voltage drop for branch-circuits supplying sensitive electronic equipment shall not exceed _____.

1.5%

The branch-circuits serving patient care locations in health care facilities must provide _____ separate equipment grounding conductor(s) in accordance with Section 517.13.

2

Isolated metal parts that are not over _____-inch(es) in any dimension and do not penetrate into a pool structure more than 1-inch are not required to be connected to the pool equipotential bonding grid.

4

One of the requirements that must be met before flexible metal conduit (FMC) is permitted to be used as an equipment grounding conductor is the combined length of FMC and flexible metallic tubing and liquid-tight flexible metal conduit (LFMC) in the same ground-fault current path can not exceed _____-feet.

6

Which NEC chapter provides grounding and bonding requirements for communications systems installed using fiber optic cables?

7

To qualify as a grounding electrode, a ground rod must generally be driven to a depth not less than _____ feet.

8

For existing installations only, the grounded conductor run with the supply conductors to a separate building or structure shall be permitted to serve as the ground-fault return path provided all but which of the following conditions are met?

A ground detection system must be installed to warn qualified persons of a ground-fault

The grounding electrode conductor connection for a service must be made in a(n) _____ location.

Accessible

The requirements for identification of equipment grounding conductors are provided in which NEC section?

Article 250.119

Which of the following bonding methods is not suitable for bonding metal equipment in any hazardous (classified) locations?

Bonding equipment to the Grounded Service Conductor

A grounding electrode system is not required at a separate building or structure when _____.

Both A. and B. are required: A) Only a single branch-circuit supplies the building or structure B) The branch-circuit contains an equipment grounding conductor

Where an isolated grounding circuit and receptacle is installed in accordance with 250.146(D), the insulated (isolated) equipment grounding conductor shall also be permitted to pass through which of the following without being connected to such enclosures?

Boxes Panelboards Wireways

A grounding electrode is a(n) _____ object through which a direct connection to earth is established.

Conductive

The grounding electrode conductor provides a conductive path to earth for grounding _____.

Electrical systems Other conductive components required to be grounded Electrical equipment

The conductive path(s) installed that provides a ground-fault current path and connects normally non-current-carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both, defines which of the following?

Equipment Grounding Conductor

What are the performance characteristics of a grounding electrode or grounding electrode system?

Establishes a ground (earth) connection Provides a direct connection to ground (earth) Maintains a ground (earth) connection

The earth is a conductor that cannot be depended upon to carry _____ or normal current in electrical systems.

Fault

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

Ground

A system or circuit conductor that is intentionally grounded defines what?

Grounded Conductor

Where the transfer equipment for a generator switches the _____ supplied by the generator, the generator is a separately derived system that must be grounded in accordance with Section 250.30(A).

Grounded Conductor

The _____ is not permitted to be connected to normally non-current-carrying metal parts of equipment, to equipment grounding conductors, or be reconnected to ground on the load side of the service disconnecting means except as otherwise specifically permitted in Article 250.

Grounded Conductor (Usually a Neutral)

In a grounded system, equipment grounding is accomplished through the required connection of the feeder or branch-circuit equipment grounding conductor(s) to the _____ and the grounding electrode conductor.

Grounded Service Conductor

The grounding of what shall be installed an arranged in a manner that will prevent objectionable current?

Grounding of surge arrestors and surge-protective devices Grounding of electrical systems or circuit conductors Grounding of conductive normally non-current-carrying metal parts of equipment

For service bonding to be effective and perform properly during ground-fault conditions, each fitting, bushing, connector, and/or coupling must be _____ to keep impedance low if a fault should occur and cause current through the conduit, enclosures, and fittings.

Made Tight

The grounded conductor is typically connected to the service disconnecting means enclosure using a _____.

Main Bonding Jumper

Circuits for electric cranes operating over combustible fibers in Class III locations, as provided in Section 503.155, are _____ to be grounded.

Not Permitted

A 480-volt, three-phase, 3-wire system is _____ to be ungrounded.

Not required

If the use of multiple grounding connections results in objectionable current, which of the following alterations shall be permitted to be made, provided that the requirements of 250.4(A)(5) or (B)(4) are met?

One or more of the following: -Discontinue one or more but not all of such grounding connections or change the locations of the grounding connections -Take other suitable remedial and approved action -Interrupt the continuity of the conductor or conductive path causing the objectionable current

A conductor installed on the supply side of a service or separately derived system to ensure the required electrical conductivity between metal parts required to be electrically connected defines what?

Supply-Side Bonding Jumper

The _____ installed for a separately derived system is required to remain within the enclosure where it originates.

System Bonding Jumper

Where the common grounding electrode conductor method is used for multiple separately derived systems, the tap conductor must connect to the system at the same location that the grounded conductor and _____ is installed.

System Bondong Jumper

Which NEC table provides grounding electrode conductor sizing requirements for copper grounding electrode conductors?

Table 250.66

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

The same potential as

A(n) _____ system has no connection from any conductor to ground or any conductive body that extends the ground connection.

Ungrounded