Rule 54.6-F

54.6-F.    Termination of Riser and Runs Encased in Metal Conduit

Where risers and runs are covered or encased with suitable protective covering (Rule 22.2) see Rule 54.6–G.

Where risers and runs are encased in metal conduit or other materials not meeting the minimum insulating efficiency as specified in Rule 22.2–B (suitable protective covering), e.g. lead risers encased in metal conduit, and such metal conduit or other conducting material extends within 4 feet of any supply conductor level the following rules shall apply.

(1)    Terminals, Terminal Fittings, and Weather Heads: Grounded portions of terminals, grounded terminal fittings, and grounded weather heads of risers or runs shall not extend above the level of line conductors to which their terminal leads are connected except:

a)    Where the line conductors are installed in vertical configuration in partial underground distribution; or

b)    where the line conductors are dead-ended on the same crossarms that the grounded portions of the terminal, grounded terminal fitting, or grounded weather head is attached and no line conductors supported on those crossarms extend past the grounded portions of the terminals, terminal fitting, or weather head, and no buckram construction is involved, or

c)    Where conductors in excess of 7500 volts are installed in vertical configuration on crossarms, and the grounded portions of terminals, grounded terminal fittings, or grounded weather heads are mounted on the same crossarms which support the conductors to which the terminals leads are connected.

(2)    Climbing Space Obstructions: Terminals, terminal fittings, and weather heads of risers or runs are not allowed in the climbing space.

(3)    Clearance from Centerline of Pole: For clearance of energized portions of terminals and their unprotected leads from centerline of pole, see Table 1, Case 8 .

EXCEPTION:    In partial underground distribution ( Rule 21.13 ) energized portions of the terminals may be less than the clearances from centerline of pole specified in Table 1, Case 8, Column E (15 or 18 inches) but shall not be less than 6 inches from the surface of the nonclimbable metal pole and grounded metal surface associated therewith.

(4)    Vertical and Radial Clearances From Conductor Below:  All exposed grounded surfaces of; terminals, terminal fittings, weather heads, cables or bends, or suitably insulated cable surfaces of risers and runs shall be at least 18 inches vertically and 18 inches radially from the next unprotected conductor level below. (See Fig. 54-4 A & B).

(5)    Protection from the Grounded Metal Conduit, Terminal Fitting, or Weather Head at the Upper End of Vertical Runs or Risers on Wood Poles: Any exposed grounded metal conduit, grounded terminal fitting, or grounded weather head at the upper end of the vertical run or riser on wood poles within distances from the centerline of pole less than as specified in Table 1, Case 8 , shall be protected by a wood crossarm or wood block placed above it at a distance not exceeding 4 inches.

EXCEPTION:    The wood block may be omitted if the exposed grounded metal conduit, grounded terminal fitting, or grounded weather head at the upper end of a vertical run or riser of 750 volts or less is:

a)    On the same side of a pole as, and not more than one foot below a transformer; or

b)    Not more than 6 inches and not less than 3 inches below the lowest conductor of a rack, and such conduit, fitting, or weather head is approximately centered in the vertical plane under the rack.

(6)    Exposed Suitably Insulated or Grounded Surfaces: Exposed suitably insulated or grounded portions of cable, conduit bends, terminal fittings, terminals, and weather heads, located at the upper end of vertical runs or risers supported on climbable poles or structures should be arranged with as little exposed surface as practicable. Such cable or conduit bends are not required to be covered by a suitable protective covering (See Figure 54-4 A & B) provided that no portion of their exposed surfaces are within the climbing space.

(7)    0 - 750 Volt Terminal Fittings and Weather Heads: The grounded terminal fittings, grounded weather heads, and unprotected cables or leads to and from risers or runs of 0 - 750 volts installed on the surfaces of poles shall not be or pass within the climbing space, but may have a clearance of less than 15 inches from centerline of pole ( Table 1, Case 8) and less than 3 inches from the surface of pole or crossarm ( Table 1, Case 9). It is recommended that cables from such terminal fittings and weather heads be suitably insulated and, where practicable, carried as protected lateral runs on the bottom surface of crossarms (See Rule 54.6–C).

(8)    Vertical Clearances from Lead Wires and Drip Loops to Other Conductors:  The Vertical clearances between the lowest point of lead wires (See unprotected conductor Fig. 54-4 A & B) of a riser or run (vertical or lateral) and the next conductor level below shall conform to the requirements specified in Rule 54.4-C6.  For the vertical clearances between supply drip loops and a communication conductor level below see Rule 92.1–F3.

Strikeout and Underline Version

Rule 54.6-F

54.6-F.    Termination of Riser and Runs Encased in Metal Conduit

Where risers and runs are covered or encased with suitable protective covering (Rule 22.2 22.8) see Rule 54.6–G.

Where risers and runs are encased in metal conduit or other materials not meeting the minimum insulating efficiency as specified in Rule 22.2-B 22.8-B (suitable protective covering), e.g. lead risers encased in metal conduit, and such metal conduit or other conducting material extends within 4 feet of any supply conductor level the following rules shall apply.

(1)    Terminals, Terminal Fittings, and Weather Heads: Grounded portions of terminals, grounded terminal fittings, and grounded weather heads of risers or runs shall not extend above the level of line conductors to which their terminal leads are connected except:

a)    Where the line conductors are installed in vertical configuration in partial underground distribution; or

b)    where the line conductors are dead-ended on the same crossarms that the grounded portions of the terminal, grounded terminal fitting, or grounded weather head is attached and no line conductors supported on those crossarms extend past the grounded portions of the terminals, terminal fitting, or weather head, and no buckram construction is involved, or

c)    Where conductors in excess of 7500 volts are installed in vertical configuration on crossarms, and the grounded portions of terminals, grounded terminal fittings, or grounded weather heads are mounted on the same crossarms which support the conductors to which the terminals leads are connected.

(2)    Climbing Space Obstructions: Terminals, terminal fittings, and weather heads of risers or runs are not allowed in the climbing space.

(3)    Clearance from Centerline of Pole: For clearance of energized portions of terminals and their unprotected leads from centerline of pole, see Table 1, Case 8 .

EXCEPTION:    In partial underground distribution ( Rule 21.13 22.5 ) energized portions of the terminals may be less than the clearances from centerline of pole specified in Table 1, Case 8, Column E (15 or 18 inches) but shall not be less than 6 inches from the surface of the nonclimbable metal pole and grounded metal surface associated therewith.

(4)    Vertical and Radial Clearances From Conductor Below:  All exposed grounded surfaces of; terminals, terminal fittings, weather heads, cables or bends, or suitably insulated cable surfaces of risers and runs shall be at least 18 inches vertically and 18 inches radially from the next unprotected conductor level below. (See Fig. 54-4 A & B).

(5)    Protection from the Grounded Metal Conduit, Terminal Fitting, or Weather Head at the Upper End of Vertical Runs or Risers on Wood Poles: Any exposed grounded metal conduit, grounded terminal fitting, or grounded weather head at the upper end of the vertical run or riser on wood poles within distances from the centerline of pole less than as specified in Table 1, Case 8 , shall be protected by a wood crossarm or wood block placed above it at a distance not exceeding 4 inches.

EXCEPTION:    The wood block may be omitted if the exposed grounded metal conduit, grounded terminal fitting, or grounded weather head at the upper end of a vertical run or riser of 750 volts or less is:

a)    On the same side of a pole as, and not more than one foot below a transformer; or

b)    Not more than 6 inches and not less than 3 inches below the lowest conductor of a rack, and such conduit, fitting, or weather head is approximately centered in the vertical plane under the rack.

(6)    Exposed Suitably Insulated or Grounded Surfaces: Exposed suitably insulated or grounded portions of cable, conduit bends, terminal fittings, terminals, and weather heads, located at the upper end of vertical runs or risers supported on climbable poles or structures should be arranged with as little exposed surface as practicable. Such cable or conduit bends are not required to be covered by a suitable protective covering (See Figure 54-4 A & B) provided that no portion of their exposed surfaces are within the climbing space.

(7)    0 - 750 Volt Terminal Fittings and Weather Heads: The grounded terminal fittings, grounded weather heads, and unprotected cables or leads to and from risers or runs of 0 - 750 volts installed on the surfaces of poles shall not be or pass within the climbing space, but may have a clearance of less than 15 inches from centerline of pole ( Table 1, Case 8) and less than 3 inches from the surface of pole or crossarm ( Table 1, Case 9). It is recommended that cables from such terminal fittings and weather heads be suitably insulated and, where practicable, carried as protected lateral runs on the bottom surface of crossarms (See Rule 54.6–C).

(8)    Vertical Clearances from Lead Wires and Drip Loops to Other Conductors:  The Vertical clearances between the lowest point of lead wires (See unprotected conductor Fig. 54-4 A & B) of a riser or run (vertical or lateral) and the next conductor level below shall conform to the requirements specified in Rule 54.4-C6.  For the vertical clearances between supply drip loops and a communication conductor level below see Rule 92.1–F3.

Final Version

Rule 54.6-F

54.6-F.    Termination of Riser and Runs Encased in Metal Conduit

Where risers and runs are covered or encased with suitable protective covering (Rule 22.8) see Rule 54.6–G.

Where risers and runs are encased in metal conduit or other materials not meeting the minimum insulating efficiency as specified in Rule 22.8–B (suitable protective covering), e.g. lead risers encased in metal conduit, and such metal conduit or other conducting material extends within 4 feet of any supply conductor level the following rules shall apply.

(1)    Terminals, Terminal Fittings, and Weather Heads: Grounded portions of terminals, grounded terminal fittings, and grounded weather heads of risers or runs shall not extend above the level of line conductors to which their terminal leads are connected except:

a)    Where the line conductors are installed in vertical configuration in partial underground distribution; or

b)    where the line conductors are dead-ended on the same crossarms that the grounded portions of the terminal, grounded terminal fitting, or grounded weather head is attached and no line conductors supported on those crossarms extend past the grounded portions of the terminals, terminal fitting, or weather head, and no buckram construction is involved, or

c)    Where conductors in excess of 7500 volts are installed in vertical configuration on crossarms, and the grounded portions of terminals, grounded terminal fittings, or grounded weather heads are mounted on the same crossarms which support the conductors to which the terminals leads are connected.

(2)    Climbing Space Obstructions: Terminals, terminal fittings, and weather heads of risers or runs are not allowed in the climbing space.

(3)    Clearance from Centerline of Pole: For clearance of energized portions of terminals and their unprotected leads from centerline of pole, see Table 1, Case 8 .

EXCEPTION:    In partial underground distribution ( Rule 22.5 ) energized portions of the terminals may be less than the clearances from centerline of pole specified in Table 1, Case 8, Column E (15 or 18 inches) but shall not be less than 6 inches from the surface of the nonclimbable metal pole and grounded metal surface associated therewith.

(4)    Vertical and Radial Clearances From Conductor Below:  All exposed grounded surfaces of; terminals, terminal fittings, weather heads, cables or bends, or suitably insulated cable surfaces of risers and runs shall be at least 18 inches vertically and 18 inches radially from the next unprotected conductor level below. (See Fig. 54-4 A & B).

(5)    Protection from the Grounded Metal Conduit, Terminal Fitting, or Weather Head at the Upper End of Vertical Runs or Risers on Wood Poles: Any exposed grounded metal conduit, grounded terminal fitting, or grounded weather head at the upper end of the vertical run or riser on wood poles within distances from the centerline of pole less than as specified in Table 1, Case 8 , shall be protected by a wood crossarm or wood block placed above it at a distance not exceeding 4 inches.

EXCEPTION:    The wood block may be omitted if the exposed grounded metal conduit, grounded terminal fitting, or grounded weather head at the upper end of a vertical run or riser of 750 volts or less is:

a)    On the same side of a pole as, and not more than one foot below a transformer; or

b)    Not more than 6 inches and not less than 3 inches below the lowest conductor of a rack, and such conduit, fitting, or weather head is approximately centered in the vertical plane under the rack.

(6)    Exposed Suitably Insulated or Grounded Surfaces: Exposed suitably insulated or grounded portions of cable, conduit bends, terminal fittings, terminals, and weather heads, located at the upper end of vertical runs or risers supported on climbable poles or structures should be arranged with as little exposed surface as practicable. Such cable or conduit bends are not required to be covered by a suitable protective covering (See Figure 54-4 A & B) provided that no portion of their exposed surfaces are within the climbing space.

(7)    0 - 750 Volt Terminal Fittings and Weather Heads: The grounded terminal fittings, grounded weather heads, and unprotected cables or leads to and from risers or runs of 0 - 750 volts installed on the surfaces of poles shall not be or pass within the climbing space, but may have a clearance of less than 15 inches from centerline of pole ( Table 1, Case 8) and less than 3 inches from the surface of pole or crossarm ( Table 1, Case 9). It is recommended that cables from such terminal fittings and weather heads be suitably insulated and, where practicable, carried as protected lateral runs on the bottom surface of crossarms (See Rule 54.6–C).

(8)    Vertical Clearances from Lead Wires and Drip Loops to Other Conductors:  The Vertical clearances between the lowest point of lead wires (See unprotected conductor Fig. 54-4 A & B) of a riser or run (vertical or lateral) and the next conductor level below shall conform to the requirements specified in Rule 54.4-C6.  For the vertical clearances between supply drip loops and a communication conductor level below see Rule 92.1–F3.