3rd 2nd (Quiz 1)

250.102(C)(1)

The minimum size required for a supply-side bonding jumper is provided in NEC table______.

the purpose of the NEC

The practical safeguarding of person and property from using electricity best describes which of the following?

Geographical location Mineral content of the soil Ambient Temperature

The resistance between a grounding electrode, such as a ground rod, and earth varies depending on which of the following?

#4 AWG copper [250.66 (B)]

What is the largest size required for a copper grounding electrode conductor that is a sole connection to a concrete encased electrode?

Not specified in the NEC

What is the maximum resistance to ground permitted for a grounding electrode system consisting of a concrete encased electrode, building steel electrode and metal water pipe electrodes?

#14 AWG copper [600.7(B)(7)(1)]

What is the minimum size bonding conductor required for bonding metal parts associated with the high voltage secondary circuit for a neon sign or outline lighting system?

#10 AWG

What is the minimum size copper equipment grounding conductor required for a 60 ampere branch circuit

3/0 AWG copper

What size copper grounding electrode conductor is required for a 6,000-ampere service supplied by ten 750 kcmil copper service conductors in parallel for each ungrounded phase conductor

1/0 AWG

Where a grounded service is supplied using two 500 kcmil copper conductors in parallel (in two separate raceways) for each ungrounded service conductor, what is the minimum size required for the grounded conductor in each raceway supplying the service?

750 kcmil copper [250.30 (A) (3) (c) ]

Where a service is supplied from a corner grounded system, and the ungrounded conductors are sized at 750 kcmil copper, what is the minimum size required for the grounded conductor.

#1 AWG copper (690.47)

Where the grounding electrode stem for the DC side of a PV installation is installed using a 6 AWG copper grounding electrode conductor, and the grounding electrode conductor for the AC system is 1 AWG copper, what is the minimum size required for the bonding conductor that must connect the two electrode systems together?

There must be properly sized overcurrent protection in the branch circuit

Which of the following conditions is not a factor in a person receiving an electric shock?

Resistance Inductive reactance capacitive reactance

Which of the following is associated with the overall opposition to current in an AC circuit?

Underground metal gas pipe

Which of the following is not permitted to be used as a grounding electrode

its source

normal current will always return to its source and fault current will always return to ______.

6 feet

A distance of not less than _____ shall be maintained between an eight-foot ground rod and the next closest ground rod.

30 Inches

A ground ring electrode must completely encircle a building or structure, be not less than 20 feet in length and be buried not less than ______ below grade.

Accessible

A grounding electrode connection is required to be made a(n) _______ location anywhere from the load end of the overhead service conductors, service drop, underground service conductors, or service lateral up to and including the terminal or bus to which the grounded conductor is connected in the service disconnecting means.

53% (Chapter 9: Table 1)

A single grounding electrode conductor installed in a ferrous metal raceway must not exceed ____ of the cross sectional area of the raceway.

Bonding Conductor or Jumper

A(n)________ is a reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected

#6 AWG

All grounding electrode conductors in sizes smaller than_____must be protected from physical damage by installation in raceway or cable armor.

Equipotential (547.2 - 8 Solid bare)

An area where wire mesh or other conductive elements are embedded in or place under concrete, bonded to all metal structures and fixed nonelectrical equipment that may become energized, and connected to the electrical grounded system to prevent a difference in voltage from within the plane is defined as a(n)______.

ground fault

An unintentional, electrically conductive connection between an ungrounded conductor of an electrical circuit and the normally non-current-carrying conductors, metallic enclosures, metallic raceways, metallic equipment, or earth. Defines which of the following?

Grounding electrode

the ___

Available fault current

the ____ of an electrical system is the maximum current a system is capable of delivering at any pint of the wiring installation.

grounding electrode

the connection to earth through which grounding is accomplished is provided by which of the following?

ground

when electrical systems for equipment are grouded, they are connected to earth either directly or through a conductive body that extend the______ connection.

Ungrounded conductors

which of the following is not a conductive body that extends the ground connection?

Overcurrent protection

which of the following is not accomplished through bonding?

Branch Circuits [517.13 (A)]

517. 13(A) requires that all ____ serving patient care areas be provided with a ground path for fault current by installation in a metal raceway system or cable armor or sheath assembly that qualifies asa an equipment grounding conductor in accordance with section 250.118

Insulated continuous copper (517.14)

517.14 requires the equipment grounding terminal buses of the normal and essential branch circuit panelboards serving the same individual patient vicinity be bonded together with a(n) ____ conductor not smaller than 10 AWG

Short circuit current

Equipment installed in an electrical system must have adequate____ratings to ensure that extensive damage to t the equipment will not result from a ground fault of short circuit condition.

#6 AWG copper [250.66(A)]

If a 400 ampere service is grounded by connection to a single ground rod, what is the maximum size grounding electrode conductor required?

Grounding electrode Grounding Electrode Conductor Equipment Grounding Conductor

If the code provides a requirement to ground equipment, it generally implies that there will be either a direct connection to the earth or a conductive body that extends the connection to ground through which of the following?

Fast overcurrent device operation (100)

In hazardous (classified) locations, it is vital to have effective grounding and bonding to facilitate ____ and prevent an explosion.

110.7

Section ____ of the NEC requires conductors to be free of short circuits and any grounding connections other than grounding connections specifically permitted in the NEC.