B&G Chapter 2 Parts I and II Review Questions

Grounding and bonding connection devices that depend solely on _____ shall not be used.

solder

For grounded systems, electrical equipment and other electrically conductive material likely to become energized shall be installed in a man-ner that creates a _____ from any point on the wiring system where a ground fault may occur to the electrical supply source.

All of these - circuit facilitating the operation of the overcurrent device - low-impedance circuit - circuit capable of safely carrying the ground-fault current likely to be imposed on it

_____ on equipment to be grounded shall be removed from contact surfaces to ensure good electrical continuity.

Any of these - Paint - Laquer - Enamel

If the use of multiple grounding connections results in objectionable current and the requirements of 250.4(A)(5) or (B)(4) are met, it shall be permitted to _____.

All of these - discontinue one or more but not all of such grounding connections - change the locations of the grounding connections - interrupt the continuity of the conductor or conductive path causing the objectionable current

NFPA 780, Standard for the Installation of Lightning Protection Systems provides information on the installation of _____ for lightning protec-tion systems [250.4(A)(1)].

a and b - grounding AND bonding

Grounded electrical systems shall be connected to earth in a manner that will _____.

a and b - limit voltages due to lightning, line surges, or unintentional contact with higher-voltage lines - stabilize the voltage-to-ground during normal operation

NFPA 780, Standard for the Installation of Lightning Protection Systems provides information on the installation of _____ for lightning protection systems [250.4(B)(1)].

a and b grounding and bonding

In grounded systems, normally noncurrent-carrying electrically conductive materials that are likely to become energized shall be connected _____ in a manner that establishes an effective ground-fault current path.

a and b together OR to the electrical supply source

Ground clamps and fittings that are exposed to physical damage shall be enclosed in _____ or equivalent protective covering.

a or b metal OR wood

Electrically conductive materials that are likely to _____ in ungrounded systems shall be connected together and to the supply system grounded equipment in a manner that creates a low-impedance path for ground-fault current that is capable of carrying the maximum fault current likely to be imposed on it.

become energized

For ungrounded systems, noncurrent-carrying conductive materials enclosing electrical conductors or equipment shall be connected to the _____ in a manner that will limit the voltage imposed by lightning or unintentional contact with higher-voltage lines.

earth

For grounded systems, electrical equipment and electrically conductive material likely to become energized, shall be installed in a manner that creates a low-impedance circuit capable of safely carrying the maximum ground-fault current likely to be imposed on it from where a ground fault may occur to the _____.

electrical supply source

For ungrounded systems, noncurrent-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 ground-fault current that is capable of carrying _____.

the maximum fault current likely to be imposed on it