Original Version
Rule 54.11
54.11 New Rule
Strikeout and Underline Version
Rule 54.11
54.11 Post insulators in vertical and horizontal position without crossarms; more than 750 volts.
Post insulators supporting conductors of more than 750 volts may be attached to poles in vertical or horizontal position, and, where so attached, the following rules shall apply.
A post insulator mounted directly on the side of a pole shall be considered as in a horizontal position.
A post insulator mounted directly at the top of the pole in a vertical position shall be considered as in vertical position.
1) Clearances: Conductors and the hardware used to secure the conductor to the insulator shall have clearances from the centerline of the pole (as specified in Rule 54.4-D2) when supported on post insulators that are mounted in horizontal position. Conductors and the hardware used to secure the conductor to the insulator shall have clearance from the surface of the pole (as specified by Table 1, Case 9, Columns E and F) when mounted in a vertical position.
2)
Conductor Arrangement: Not more than
one circuit over 750 volts shall be attached to any pole on post insulators in
tri- angular configuration. Not more than four conductors of anyone circuit
over 750 volts shall be attached to a pole on post insulators. The number of
circuits attached to a pole by post insulators, except in triangular
configuration, is not restricted (a circuit is in triangular configuration only
when it consists of one phase on insulators mounted vertically at the top of
the pole and other phases on insulators mounted horizontally on opposite sides
of the pole).
Conductors on post insulators
over 750 volts shall not be attached to more than three sides (there being four
sides) of any pole at the same level of any circuit group. Climbing space in
con- junction with these attachments shall be maintained as specified by Rule
54.11-F.
All conductors of the same circuit on post insulators in the same vertical plane shall be of the same material.
The vertical separation between conductors of the same circuit supported on post insulators in the same vertical plane shall be not less than spacing as indicated in Table 2, Case 20, Columns E, F, G, H and I.
A vertical clearance of not less than that specified in Table 2, Case 8 through 13, shall be maintained between the lowest conductor supported on post insulator of a circuit group and the conductors supported on the same pole of the next lower circuit group.
1) One Vertical Circuit at Pole Top: For a single circuit at the top of the pole, the climbing space shall be maintained to the lowest conductor on the climbing side of the pole and workmen shall not go above the lowest conductor level,
EXCEPT:
(a) When Conductors Are Moved Out From Pole by accepted "hotline" techniques, or
(b) When the Pole Top Circuit Is De-energized and grounded, the climbing space shall be maintained to the top conductor of the circuit and the climbing space shall not be less than 30 inches square.
2) Two Vertical Circuits at Pole Top: When two vertical circuits are installed at the top of pole, the climbing space shall be maintained to the lowest conductor level of those circuits on the climbing side of the pole and workmen shall not go above such lowest conductor level,
EXCEPT:
(a) When Conductors Are Moved Out From Pole by accepted "hotline" techniques, or
(b) When Both Circuits Are De-energized and grounded the climbing space shall be maintained to the top conductors of the circuits. The space shall not be less than 30 inches square.
(c) When One Circuit Is De-energized and grounded, the climbing space shall be maintained on the climbing side between the center line of the pole and the de-energized conductors. The space shall be not less than 36 inches square.
3) Vertical Circuits Bonded Together: When vertical circuits are bonded together, regardless of location on the pole, the climbing space shall be maintained to the lowest conductor level of those circuits on the climbing side of the pole and workmen shall not go above such lowest conductor level, unless conductors are moved out from pole by accepted "hotline" techniques, or
EXCEPT:
(a) Where a Single Circuit is Involved and such circuit is de-energized and the bond and the de-energized circuit is grounded as required in Rule 53.4-A3b, the climbing space shall not be less than 36 inches and shall be maintained for a vertical distance of not less than 4 feet below the lowest conductor and not less than 4 feet above the top conductor when not at the top of pole.
(b) Where Two Circuits Are Involved:
(1) When Both Circuits Are De-energized and commonly bonded and the bond and the circuits grounded as required in Rule 53.4-A3b, the climbing space shall be maintained to the top conductors of the circuits. The space shall not be less than 36 inches square and shall be maintained for a vertical distance of not less than 4 feet below the lowest conductor and not less than 4 feet above the top conductor when not at the top of pole.
(2) When One Circuit Is De-energized and both circuits are commonly bonded and the bond and the de-energized circuit grounded as required in Rule 53.4-A3b, the climbing space shall be maintained on the climbing side between the center line of the pole and the de-energized conductors. The space shall not be less than 36 inches square, and shall be maintained for a vertical distance of not less than 4 feet below the lowest conductor and not less than 4 feet above the top conductor when not at the top of pole.
4)
Unbonded Circuits Below Pole Top: For
unbonded circuits below the pole top position climbing space shall be
maintained through the levels of conductors supported on post insulators for a
vertical distance of not less than four feet above the top conductor and not
less than four feet below the lowest conductor.
The climbing space shall be a square of horizontal
dimensions tabulated below and one side of the climbing space shall pass
through the center line of the pole.
Voltage of Conductor |
Dimensions of Square |
750-7,500 volts |
36" |
7,500-46,000 volts |
42" |
More than 46,000 volts |
42" plus ½ " per kV in excess of 46 kV |
Post-type insulators and their attaching brackets which support line conductors of over 750 volts may extend not more than one-half of their dimension D into the climbing space.
Suitable protected vertical conductors attached to the surface of poles and guys (except those guys contacting metal pins or dead-end hardware (as specified in Rule 52.7D) are allowed in the climbing spaces provided that not more than one guy and one vertical riser, run, or ground wire are installed in any 4-foot vertical section of climbing space. The terminals or terminal fittings of risers or runs shall not be installed within climbing spaces.
Final Version
Rule 54.11
54.11 Post insulators in vertical and horizontal position without crossarms; more than 750 volts.
Post insulators supporting conductors of more than 750 volts may be attached to poles in vertical or horizontal position, and, where so attached, the following rules shall apply.
A post insulator mounted directly on the side of a pole shall be considered as in a horizontal position.
A post insulator mounted directly at the top of the pole in a vertical position shall be considered as in vertical position.
1) Clearances: Conductors and the hardware used to secure the conductor to the insulator shall have clearances from the centerline of the pole (as specified in Rule 54.4-D2) when supported on post insulators that are mounted in horizontal position. Conductors and the hardware used to secure the conductor to the insulator shall have clearance from the surface of the pole (as specified by Table 1, Case 9, Columns E and F) when mounted in a vertical position.
2)
Conductor Arrangement: Not more than
one circuit over 750 volts shall be attached to any pole on post insulators in
tri- angular configuration. Not more than four conductors of anyone circuit
over 750 volts shall be attached to a pole on post insulators. The number of
circuits attached to a pole by post insulators, except in triangular
configuration, is not restricted (a circuit is in triangular configuration only
when it consists of one phase on insulators mounted vertically at the top of
the pole and other phases on insulators mounted horizontally on opposite sides
of the pole).
Conductors on post insulators
over 750 volts shall not be attached to more than three sides (there being four
sides) of any pole at the same level of any circuit group. Climbing space in
con- junction with these attachments shall be maintained as specified by Rule
54.11-F.
All conductors of the same circuit on post insulators in the same vertical plane shall be of the same material.
The vertical separation between conductors of the same circuit supported on post insulators in the same vertical plane shall be not less than spacing as indicated in Table 2, Case 20, Columns E, F, G, H and I.
A vertical clearance of not less than that specified in Table 2, Case 8 through 13, shall be maintained between the lowest conductor supported on post insulator of a circuit group and the conductors supported on the same pole of the next lower circuit group.
1) One Vertical Circuit at Pole Top: For a single circuit at the top of the pole, the climbing space shall be maintained to the lowest conductor on the climbing side of the pole and workmen shall not go above the lowest conductor level,
EXCEPT:
(a) When Conductors Are Moved Out From Pole by accepted "hotline" techniques, or
(b) When the Pole Top Circuit Is De-energized and grounded, the climbing space shall be maintained to the top conductor of the circuit and the climbing space shall not be less than 30 inches square.
2) Two Vertical Circuits at Pole Top: When two vertical circuits are installed at the top of pole, the climbing space shall be maintained to the lowest conductor level of those circuits on the climbing side of the pole and workmen shall not go above such lowest conductor level,
EXCEPT:
(a) When Conductors Are Moved Out From Pole by accepted "hotline" techniques, or
(b) When Both Circuits Are De-energized and grounded the climbing space shall be maintained to the top conductors of the circuits. The space shall not be less than 30 inches square.
(c) When One Circuit Is De-energized and grounded, the climbing space shall be maintained on the climbing side between the center line of the pole and the de-energized conductors. The space shall be not less than 36 inches square.
3) Vertical Circuits Bonded Together: When vertical circuits are bonded together, regardless of location on the pole, the climbing space shall be maintained to the lowest conductor level of those circuits on the climbing side of the pole and workmen shall not go above such lowest conductor level, unless conductors are moved out from pole by accepted "hotline" techniques, or
EXCEPT:
(a) Where a Single Circuit is Involved and such circuit is de-energized and the bond and the de-energized circuit is grounded as required in Rule 53.4-A3b, the climbing space shall not be less than 36 inches and shall be maintained for a vertical distance of not less than 4 feet below the lowest conductor and not less than 4 feet above the top conductor when not at the top of pole.
(b) Where Two Circuits Are Involved:
(1) When Both Circuits Are De-energized and commonly bonded and the bond and the circuits grounded as required in Rule 53.4-A3b, the climbing space shall be maintained to the top conductors of the circuits. The space shall not be less than 36 inches square and shall be maintained for a vertical distance of not less than 4 feet below the lowest conductor and not less than 4 feet above the top conductor when not at the top of pole.
(2) When One Circuit Is De-energized and both circuits are commonly bonded and the bond and the de-energized circuit grounded as required in Rule 53.4-A3b, the climbing space shall be maintained on the climbing side between the center line of the pole and the de-energized conductors. The space shall not be less than 36 inches square, and shall be maintained for a vertical distance of not less than 4 feet below the lowest conductor and not less than 4 feet above the top conductor when not at the top of pole.
4)
Unbonded Circuits Below Pole Top: For
unbonded circuits below the pole top position climbing space shall be
maintained through the levels of conductors supported on post insulators for a
vertical distance of not less than four feet above the top conductor and not
less than four feet below the lowest conductor.
The climbing space shall be a square of horizontal
dimensions tabulated below and one side of the climbing space shall pass
through the center line of the pole.
Voltage of Conductor |
Dimensions of Square |
750-7,500 volts |
36" |
7,500-46,000 volts |
42" |
More than 46,000 volts |
42" plus ½ " per kV in excess of 46 kV |
Post-type insulators and their attaching brackets which support line conductors of over 750 volts may extend not more than one-half of their dimension D into the climbing space.
Suitable protected vertical conductors attached to the surface of poles and guys (except those guys contacting metal pins or dead-end hardware (as specified in Rule 52.7-D) are allowed in the climbing spaces provided that not more than one guy and one vertical riser, run, or ground wire are installed in any 4-foot vertical section of climbing space. The terminals or terminal fittings of risers or runs shall not be installed within climbing spaces.