Applied Grounding and Bonding Quiz

For a service grounded conductor of 6 AWG and smaller, which one of the following is not permitted to identify the conductor?

White marking tape at time of termination

The equipment grounding terminal bars of normal and essential branch circuit panelboards that serve the same individual patient care vicinity must be connected (bonded) together with an insulated copper conductor no smaller than _____

10 AWG

Where the system is 3-phase, 4 wire, wye-connected and the neutral conductor is used as a circuit conductor, the system is _____ grounded

required to be

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

4 AWG Copper

For a three-phase, four-wire AC system that is grounded, which conductor is required to be grounded?

The neutral conductor

As an alternative to installing an intersystem bonding termination (IBT) in accordance with 250.94(A), connections to an aluminum or copper busbar not less than ¼ inch thick and two inches wide, and of sufficient length to accommodate at least three terminations for communication system. This bus bar shall meet all but which of the following?

Aluminum busbar(s) shall not be permitted

Which part of NEC Article 250 includes the provisions that require system grounding, permit system grounding, and prohibit system grounding?

Part II

Which section of the NEC provides performance provisions that clarify what electrical grounding and bonding are intended to accomplish?

Section 250.4

A metal underground water pipe qualifies as a grounding electrode in accordance with which of the following?

If there is not less than 10’ in direct contact with earth

If the grounded metal outlet box is _____ and there is direct metal-to-metal contact between the morning strap of the device and the grounding metal box, the equipment bonding jumper is not required

Surface-mounted

Which part of Article 250 contains the specific prescriptive requirements for bonding?

Part V

All grounding electrodes _____ must be bonded together to form a grounding electrode system at each building or structure served by electricity

Present

An equipment grounding conductor is not permitted to additionally serve as a grounding electrode conductor unless which of the following conditions are met?

The equipment grounding conductor meets all requirements of the grounding electrode conductor and does not create objectionable currents

A system or circuit conductor that is intentionally grounded defines which of the following?

Grounded conductor

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

foundation

A rebar extension connected to a concrete encased electrode and extending from the electrode must not be extended into direct contact with the Earth unless provided with which one of the following?

Corrosion protection

The auxiliary electrode(s) can be connected directly to a PV array frame or structure and are required to be installed at ______

the location of ground and roof-mounted PV arrays

In patient care spaces of a health care facility, where isolated/insulated equipment grounding circuits are installed with the branch circuits, not less than _____ EGC paths are required to be installed to meet the requirement of 517.13 and 250.146(D)

3

Where no grounding or electrodes exist at a building or structure supplied by a feeder, one or more of the grounding electrodes specified in 250.52(A)(4) through (A)(8) shall be installed and used, including all but which of the following?

Metal underground gas piping

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?

2 AWG copper

Where the grounding electrode for a building is a metal underground water pipe electrode, what is the minimum size copper grounding electrode conductor tap that is extended from a common grounding electrode conductor to a service disconnect that is supplied by a 250 kcmil copper service-entrance conductors?

2 AWG

Flexible metal conduit is permitted to be used as an equipment grounding conductor if the length does not exceed _____ and other specific conditions of the NEC are met

6’

Equipment grounding conductors perform all but which of the following functions?

Normal current-carrying conductor functions

Where branch circuit conductors are spliced within an outlet box or terminated on equipment within or supported by a box, which equipment grounding conductors (EGCs) associated with the circuit conductors shall be connected within the box or to the box with devices suitable for the use in accordance with 250.8 and 250.148(A) through (D)?

All EGC’s are associated with any branch circuits

Where a permanently installed generator is not separately derived, and overcurrent protection is not an integral; part of the generator assembly, a(n) _____ is required to be installed between the generator equipment grounding terminal and the equipment grounding terminal bar or bus in the first disconnecting means enclosure supplied by the system

supply-side bonding jumper

If the breaker for a feeder is rated at 3,000 amperes, and the feeder is installed using 10 parallel PVC raceways, what is the minimum size aluminum or copper-clad aluminum wire-type equipment grounding conductor required to be installed in each raceway?

600 ccmil

If the largest ungrounded conductor from a separately derived system total is 750 ccmil aluminum, what is the minimum size required for the required system bonding jumper?

3/0 aluminum or copper-clad aluminum

The provisions of Section 250.6 shall not be considered as permitting electronic equipment from being operated on AC systems or branch circuits that are not connected to a(n) ______ as required

equipment grounding conductor

Where a length of reinforcing rod (rebar) is used as a concrete-encased electrode, rebar extensions that exit from the concrete shall not be permitted to be exposed to the earth without the use of?

corrosion protection

The ______ is a conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system

grounding electrode conductor

Exposed structural metal that is interconnected to form a metal building frame, is not intentionally grounded, and is likely to become energized is required to be bonded to which of the following?

Any of the above

Multiple separately derived system that are connected in parallel are considered _____ system(s)

a single separately derived

When an auxiliary grounding electrode is installed at a light pole base in a parking lot, an auxiliary grounding electrode is permitted to be connected to the equipment to which the _____ is connected

equipment grounding conductor

Chapter 6 in the NEC provides specific rules that apply to ______

special equipment

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

The building or structure _____ shall be used to ground a separately derived system that is required to be grounded

grounding electrode system

Which of the following bonding methods is not permitted for the bonding required on the supply side of the service disconnected?

standard locknuts and bushings

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

Bonding equipment to the grounded service conductor

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

accessible

What NEC reference and table is used to size a bonding jumper on the supply side?

250.102(C) and Table 250.102(C)(1)