Original Version
Rule 58.3-B3d
58.3-B3d) From 750-7,500 Volt Conductors Above: The clearance between un-energized metal parts of transformers and 750-7,500 volt conductors above or alongside shall be not less than 12 inches vertically or 12 inches horizontally, except that conductors of the circuit to which the transformer is connected may be less than the 12-inch vertical clearance from such un-energized parts but shall be not less than 6 inches vertically from the transformer case and not less than 3 inches radially from the hanger provided no line conductor which is less than 12 inches horizontally from the case or hanger is less than 3 inches (Table 1, Case 9) above the level of the top surface of the crossarm.
Strikeout and Underline Version
Rule 58.3-B3d
58.3-B3d) From
750-7,500 Volt Conductors Above: The clearance between un-energized metal parts
of transformers and 750-7,500 volt conductors above or alongside shall be not
less than 12 inches vertically or 12 inches horizontally, except that
conductors of the circuit to which the transformer is connected may be less
than the 12-inch vertical clearance from such un-energized parts but shall be
not less than 6 inches vertically from the transformer case and not less than 3
inches radially from the hanger provided no line conductor which is less than
12 inches horizontally from the case or hanger is less than 3 inches (Table 1,
Case 9) above the level of the top surface of the crossarm.
EXCEPTION: The vertical clearance shall not be less than
30 inches from the conductor at the top of pole as in Rule 54.4-D8.
Final Version
Rule 58.3-B3d
58.3-B3d) From
750-7,500 Volt Conductors Above: The clearance between un-energized metal parts
of transformers and 750-7,500 volt conductors above or alongside shall be not
less than 12 inches vertically or 12 inches horizontally, except that
conductors of the circuit to which the transformer is connected may be less than
the 12-inch vertical clearance from such un-energized parts but shall be not
less than 6 inches vertically from the transformer case and not less than 3
inches radially from the hanger provided no line conductor which is less than
12 inches horizontally from the case or hanger is less than 3 inches (Table 1,
Case 9) above the level of the top surface of the crossarm.
EXCEPTION: The vertical clearance
shall not be less than 30 inches from the conductor at the top of pole as in
Rule 54.4-D8.