Original Version
Rule 54.4-C1b
54.4-C1b)
Conductors of 750-20,000 Volts: The 4 foot vertical clearance
between conductors of 7500-20,000 volts, as specified in Table 2, Case 11,
Column F, may be reduced to not less than 3 feet, provided all of the following
conditions are met:
The conductors involved are of one ownership and the circuits
are operated and maintained by the same crews of workmen;
Under no conditions is the reduced clearance to be applied in new construction
involving new poles;
Buck arm construction, transformers, or capacitors are not involved;
More than one reduced clearance of 3 feet shall not be used on any pole;
and
It is not practicable to obtain the normally required 4-foot clearance.
Strikeout and Underline Version
Rule 54.4-C1b
54.4-C1b)
Conductors of 750-20,00021,000
Volts: The 4 foot vertical clearance between conductors of 7500-
20,00021,000 volts, as specified in Table 2, Case 11, Column
F, may be reduced to not less than 3 feet, provided all of the following
conditions are met:
The conductors involved are of one ownership and the circuits
are operated and maintained by the same crews of workmen;
Under no conditions is the reduced clearance to be applied in new construction
involving new poles;
Buck arm construction, transformers, or capacitors are not involved;
More than one reduced clearance of 3 feet shall not be used on any pole;
and
It is not practicable to obtain the normally required 4-foot clearance.
Final Version
Rule 54.4-C1b
54.4-C1b)
Conductors of 750-21,000 Volts: The 4 foot vertical
clearance between conductors of 7500-21,000 volts, as specified in Table 2,
Case 11, Column F, may be reduced to not less than 3 feet, provided all of
the following conditions are met:
The conductors involved are of one ownership and the
circuits are operated and maintained by the same crews of workmen;
Under no conditions is the reduced clearance to be applied in new construction
involving new poles;
Buck arm construction, transformers, or capacitors are not involved;
More than one reduced clearance of 3 feet shall not be used on any pole;
and
It is not practicable to obtain the normally required 4-foot clearance.