Ampacity
the current-carrying capacity, expressed in amperes, of an electric conductor under stated thermal conditions. (pg. 7)
Cable
A conductor with insulation, or a stranded conductor with or without insulation and other coverings (single-conductor cable), or a combination of conductors insulated from one another (multiple-conductor cable).
Cable Jacket
A protective covering over the insulation, core, or sheath of a cable.
Cable sheath
A conductive protective covering applied to cables
Cable terminal
A device that provides insulated egress for the conductors
Conductor
A material, usually in the form of a wire, cable, or bus bar, suitable for carrying an electric current.
Effectively Grounded Neutral Conductor
A conductor that is intentionally connected to the source transformer neutral directly or through an impedance to limit phase-to-ground fault current and has not less than four grounds in each 1.6 km (1.0 mi) of line. The conductor shall be of sufficient size to carry the available fault current and permit prompt operation of circuit protective devices.
Electric Supply Station
Any building, room, or separate space within which electric supply equipment is located and the interior of which is accessible, as a rule, only to qualified persons. This includes generating stations and substations, including their associated generator, storage battery, transformer, and switchgear rooms or enclosures, but does not include facilities such as pad-mounted equipment and installations in manholes and vaults.
Grounded
Connected to or in contact with earth or connected to some extended conductive body that serves instead of the earth.
Insulated
Separated from other conducting surfaces by a dielectric (including air space) offering a high resistance to the passage of current.
Electric Supply Lines
Those wires, conductors, and cables used to transmit electric or light energy and their necessary supporting or containing structures, equipment and apparatus that are used to provide public or private electric supply or lighting service.
voltage
Effective (rms) difference of potential between conductors or between conductor and ground (Section 2, ~p. 13)
Utility
An organization responsible for the engineering and supervision (design, construction, operation, and maintenance) of a public or private electric supply, communication, area lighting, street lighting, signal, or railroad utility system. (pg.18)
Utility Interactive System
An electric power production system that is operating in parallel with and capable of delivering energy to a utility electric supply system. (pg. 19)
raceway
A channel designed expressly for holding conductors (Section 2, ~p. 11)
service drop
Overhead conductors between supply system and building (Section 2, ~p. 12)
Where are AC systems over 750 V grounded?
At the neutral of the source (Section 9, ~p. 24)
What must grounding conductors be capable of carrying?
Maximum fault current without damage (Section 9, ~p. 29)
How often must multi-grounded systems be grounded?
At least 4 times per mile (Section 9, ~p. 34)
Protective Grounding
-Grounding method
-Provision for grounding equipment during maintenance
-more than 600 V between conductors - disconnecting or isolating switches only, shall be provided with some means for grounding.
Clearances from Live parts _TABLES
Found on Pg 52,53 & 54
Working Space TABLE
Found on pg. 60
Location and arrangement of power transformers and regulators
Power transformers and regulators shall be so installed that all energized parts are enclosed or guarded so as to limit the likelihood of inadvertent contact, or the energized parts shall be physically isolated
Short-circuit protection of power transformers
The devices for automatically disconnecting the source of supply may be a circuit breaker, circuit switcher, fuse, thyristor blocking, or other reasonable methods either locally or remotely connected to the transformer
