Original Version
Rule 20.8
20.8 Conductor means a material suitable for: (1) carrying electric current, usually in the form of a wire, cable or bus bar, or (2) transmitting light in the case of fiber optics.
A. Bundle Conductor means a group of conductors
of the same phase and polarity.
B.
Lateral Conductor means a conductor extending in a general horizontal
direction and usually at an angle of approximately 90 degrees to the direction
of the line conductors.
C.
Line Conductor means an overhead conductor which extends from the last
point of support on one overhead line structure to the first point of support
on another overhead line structure.
D.
Open Wire Conductors mean communication conductors separately supported.
E.
Unprotected Conductors mean supply conductors, including but not limited
to lead wires, not enclosed in a grounded metal pole or not covered by: a
“suitable protective covering” (see Rule 22.2
), grounded metal conduit, or grounded metal sheath or shield. Provisions
for the use of such types of coverings are specified in certain of these
rules.
F. Vertical Conductor means a conductor extending in a general vertical direction between conductor levels on an overhead line structure.
G. Insulated Conductors or Cables, suitable, mean supply conductors which are surrounded by an insulating material (see Rule 21.4), the dielectric strength of which is sufficient to withstand the maximum difference of potential at normal operating voltages of the circuit without breakdown or puncture. A weather-resistant covering of a supply conductor does not meet the requirements of this rule as to suitable insulation.
H. Trolley Contact Conductor is the contact conductor itself and any energized support wire or messenger when used in catenary construction. (See Rule 20.5-E.)
Strikeout and Underline Version
Rule 20.8
20.8 Conductor means a material suitable for: (1) carrying
electric current, usually in the form of a wire, cable or bus bar, or (2)
transmitting light in the case of fiber optics.
A. Bundle Conductor means a group of conductors
of the same phase and polarity.
B.
Lateral Conductor means a conductor extending in a general horizontal
direction and usually at an angle of approximately 90 degrees to the direction
of the line conductors.
C.
Line Conductor means an overhead conductor which extends from the last
point of support on one overhead line structure to the first point of support
on another overhead line structure.
D.
Open Wire Conductors mean communication conductors separately supported.
E.
Unprotected Conductors mean supply conductors, including but not limited
to lead wires, not enclosed in a grounded metal pole or not covered by: a
“suitable protective covering” (see Rule 22.2
), grounded metal conduit, or grounded metal sheath or shield. Provisions
for the use of such types of coverings are specified in certain of these
rules.
F.
Vertical Conductor means a conductor extending in a general vertical
direction between conductor levels on an overhead line structure.
G.
Insulated
Conductors or Cables, suitable,
mean supply conductors which are surrounded by an insulating
material (see Rule 21.4), the dielectric strength of which is sufficient
to withstand the maximum difference of potential at normal operating voltages
of the circuit without breakdown or puncture. A weather-resistant covering of a
supply conductor does not meet the requirements of this rule as to suitable
insulation.
H. Trolley Contact Conductor is the contact conductor itself and any energized
support wire or messenger when used in catenary construction. (See Rule 20.5-E.)
20.7 Common Neutral Systems mean those electrical supply
distribution systems wherein the same specially grounded neutral conductor (see
Rule
59.4–B ) is utilized as both the neutral conductor
of primary circuits of less than 22,500 volts and as the neutral conductor of
the secondary circuits of 0 – 750 volts supplied therefrom.
Final Version
Rule 20.8
20.8 Common Neutral Systems mean those electrical supply distribution systems wherein the same specially grounded neutral conductor (see Rule 59.4-B) is utilized as both the neutral conductor of primary circuits of less than 22,500 volts and as the neutral conductor of the secondary circuits of 0 – 750 volts supplied therefrom.