Original Version
Rule 54.4-C2a
54.4-C2a)
One Voltage Classification*: The clearance of Table 2, Case
14 (and clearances less than as specified in cases 9 to 13) shall not be
applied consecutively both above and below the same conductor. The
foregoing provisions of this rule do not apply to conductors in triangular
or vertical configuration, the clearances of Table 2, Case 14 being directly
applicable.
Where Conductors of one voltage classification only are supported on the
same crossarms, the vertical clearances specified in Table 2, Case 14 are
not required between conductors on line arm and conductors on related buck
arm provided no conductors on the line arm cross conductors of different
phase or polarity on the buck arms.
*Voltage Classification
for this purpose are:
0-750 volts
750-7500 volts
7500-20,000 volts
and
20,000 volts and
above.
Strikeout and Underline Version
Rule 54.4-C2a
54.4-C2a)
One Voltage Classification*: The clearance of Table 2,
Case 14 (and clearances less than as specified in cases 9 to 13) shall not
be applied consecutively both above and below the same conductor. The
foregoing provisions of this rule do not apply to conductors in triangular
or vertical configuration, the clearances of Table 2, Case 14 being directly
applicable.
Where Conductors of one voltage classification only are supported on the
same crossarms, the vertical clearances specified in Table 2, Case 14 are
not required between conductors on line arm and conductors on related buck
arm provided no conductors on the line arm cross conductors of different
phase or polarity on the buck arms.
*Voltage Classification for this purpose
are:
0-750 volts
750-7500 volts
7500-20,000
21,000 volts and
20,000
21,000 volts and above.
Final Version
Rule 54.4-C2a
54.4-C2a)
One Voltage Classification*: The clearance of Table
2, Case 14 (and clearances less than as specified in cases 9 to 13) shall
not be applied consecutively both above and below the same conductor.
The foregoing provisions of this rule do not apply to conductors in triangular
or vertical configuration, the clearances of Table 2, Case 14 being directly
applicable.
Where Conductors of one voltage classification only are supported on the
same crossarms, the vertical clearances specified in Table 2, Case 14 are
not required between conductors on line arm and conductors on related buck
arm provided no conductors on the line arm cross conductors of different
phase or polarity on the buck arms.
*Voltage Classification for this purpose
are:
0-750 volts
750-7500 volts
7500-21,000 volts
and
21,000 volts and
above.