Original Version
Rule 54.8-B
54.8-B. Clearances Above Ground, Buildings, Etc.
(1)
Above Public Thoroughfares: Service drop conductors shall
have a vertical clearance of not less than 18 feet above public thoroughfares,
except that this clearance may grade from 18 feet at a position not more
than 12 feet horizontally from the curb line to a clearance of not less
than 16 feet at the curb line, provided the clearance at the centerline
of any public thoroughfare shall in no case be less than 18 feet. Where there
are no curbs the foregoing provisions shall apply using the outer limits
of possible vehicular movement in lieu of a curb line.
(2) Above Private Thoroughfares and Other Private Property:
a) Industrial or Commercial Premises: Over private driveways, lanes, or other private property areas accessible to vehicles on premises used for industrial or commercial purpose, service drops shall have a vertical clearance of not less than 16 feet.
b) Residential Premises: Over private driveways or lanes or other premises used for residential purpose only, service drops shall have a vertical clearance of not less than 12 feet. If the building served does not permit an attachment which will afford a clearance of at least 12 feet over such areas without the installation of a structure on the building to provide additional height, the vertical clearance of service drops of 0-300 volts only may be less than 12 feet but shall be maintained as great as possible and shall be not less than 10 feet.
(3) Above Ground in Areas Accessible to Pedestrians Only:
a) Industrial and Commercial Premises: Over areas accessible to pedestrians only on premises used for industrial or commercial purposes, service drops shall be maintained at a vertical clearance of not less than 12 feet.
b) Residential Premises: Over areas accessible to pedestrians only on residential premises, service drops shall be maintained at a vertical clearance of not less than 10 feet. If the building served does not permit an attachment which will afford at least 10 feet clearance over such areas without the installation of a structure on the building to provide additional height, the vertical clearance of service drops of 0-300 volts only may be less than 10 feet but shall be maintained as great as possible and shall be not less than 8 feet 6 inches. If the building served would require the installation of an attachment structure to provide height sufficient to afford a vertical clearance of at least 8 feet 6 inches, the full clearance of 10feet shall be maintained.
(4) From Buildings and Structures: Service drops shall be so arranged as to hamper and endanger workmen and firemen as little as possible in the performance of their duties.
a) Industrial and Commercial premises: On premises used for industrial or commercial purposes service drops shall be maintained at a vertical clearance of not less than 8 feet over all or any portions of buildings and structures, except that service drops of 0-300 volts may be less than 8 feet, but not less than 12 inches, above the cornice, decorative appendage, eave, roof or parapet wall of the building served provided:
The
current carrying service conductors are insulated for the voltage being
supplied (see Rule 20.8-G), and the point of attachment of the service drops is
not more than 18 inches back of the front face of the building wall facing the
pole line from which the service drops originate.
Service drops are not required to clear buildings any specified horizontal distance but shall be so installed that they clear fire escapes exits, windows, doors and other points at which human contact might be expected a horizontal distance of not less than 3 feet.
Where service drop crosses over metallic or non-metallic nonwalkable overhang or patio cover vertical clearance may be less than 8 feet, but not less than 24 inches providing such service drops consist of abrasion-resistant cables having a grounded metallic sheath and are insulated for the voltage being supplied.
Service drops are not required to clear buildings any specified horizontal distance but shall be so installed that they clear fire escapes, exits, windows, doors and other points at which human contact might be expected, a horizontal distance of not less than 3 feet. Where attached to the surface of buildings the installation shall be made in accordance with the Electrical Safety Orders of the Industrial Accident Commission, effective May 1, 1934.
b)
Residential Premises: On premises used
for residential purpose only, service drops of 300-750 volts shall be
maintained at a vertical clearance of not less than 8 feet over all buildings
and structures.
The clearance above buildings of service drops of
0-300 volts shall be not less than the distance specified in Table 10.
Table 10 Minimum Allowable Clearances of Service Drops of 0-300 Volts Above Buildings. |
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| Type of Roof |
Minimum clearance above |
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| Building Served |
Other Buildings on Premises served |
Buildings on other premises |
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| Metal roof 3/8 pitch or less (a) |
8 ft.(c) |
8 ft. |
8 ft. |
| Metal roof, more than 3/8 pitch |
2 ft.(c) |
2 ft. |
8 ft. |
| Nonmetallic roof, 3/8 pitch or less |
(b) |
2 ft. |
8 ft. |
| Nonmetallic roof, more than 3/8 pitch |
(b) |
2 ft. |
2 ft. |
a. 3/8 pitch is a approximately 37 degrees from the horizontal.
b. No limit specified but the greatest clearance should be obtained.
c. Where insulated abrasion-resistant conductors are may be reduced to 12 inches.
On premises used for residential purposes only the clearance above building of service drops of 0-300 volts may be less than the distance specified in Table 10 but not less than 12 inches over the building served nor less than 24 inches above other buildings on the premises served, provided:
The current-carrying conductors consist of abrasion-resistant cable having a grounded metallic sheath or neutral supported service drop cable manufactured in accordance with Standard No. WC-%-1961 or Standard No. WC-3-1959 of the National Electric Manufactures Association and are insulated for the voltage being supplied and the roof is metallic or nonmetallic, nonwalkable over hang or patio cover.
Service Drops are not required to clear buildings on residential premises any specified horizontal distance, but shall be so installed that they clear fire escapes, exits, windows, doors, and other points at which human contact might be expected, a horizontal distance of not less than 3 feet. Service drops above a horizontal plane through the top extremity of an opening should maintain the maximum practical radial clearance, which in no event shall be less than 1 foot.
(5) Over Swimming Pools: (See Rule 54.4-A4 and Fig 54-1)
NOTE: Portions Of This Rule Have Been Revised And Moved To Rule 54.4-A4.
Strikeout and Underline Version
Rule 54.8-B
54.8-B. Clearances Above Ground, Buildings, Etc.
(1)
Above Public Thoroughfares: Service drop conductors shall
have a vertical clearance of not less than 18 feet above public thoroughfares,
except that this clearance may grade from 18 feet at a position not more
than 12 feet horizontally from the curb line to a clearance of not less
than 16 feet at the curb line, provided the clearance at the centerline
of any public thoroughfare shall in no case be less than 18 feet. Where there
are no curbs the foregoing provisions shall apply using the outer limits
of possible vehicular movement in lieu of a curb line.
(2) Above Private Thoroughfares and Other Private Property:
a) Industrial or Commercial Premises: Over private driveways, lanes, or other private property areas accessible to vehicles on premises used for industrial or commercial purpose, service drops shall have a vertical clearance of not less than 16 feet.
b)
Residential Premises: Over private
driveways or lanes or other premises used for residential purpose only, service
drops shall have a vertical clearance of not less than 12 feet. If the building served does not permit an
attachment which will afford a clearance of at least 12 feet over such areas
without the installation of a structure on the building to provide additional
height, the vertical clearance of service drops of 0-300 volts only may be less
than 12 feet but shall be maintained as great as possible and shall be10
(3) Above Ground in Areas Accessible to Pedestrians Only:
a)
Industrial and Commercial Premises:on
service drops shall
be maintained at a vertical clearance of not less than 12 feet.premises used for industrial or commercial purposes,
EXPCEPTION: This clearance insulated services that conform with rule 20.8G to not less than 8 feet 6 inches.
b)
Residential Premises: Over areas
accessible to pedestrians only on residential premises, service drops shall be
maintained at a vertical clearance of not less than 10 feet. If the building served does not permit an
attachment which will afford at least 10 feet clearance over such areas without
the installation of a structure on the building to provide additional height,
the vertical clearance of service drops of 0-300 volts only may be less than 10
feet but shall be maintained as great as possible and shall beIf the
building served would require the installation of an attachment structure to
provide height sufficient to afford a vertical clearance of at least 8 feet 6
inches, the full clearance of 10feet shall be maintained.
(4) From Buildings and Structures: Service
drops should shall be so arranged so as to hamper or
and endanger workmen workers and firemen firefighters
as little as possible in while the performance of performing
their duties.
a)
Vertical Clearances: Service drop
vertical clearances shall be maintained over all portions of buildings and
structures as required by Table 10.
Industrial and Commercial premises: On premises used for industrial or commercial purposes
service drops shall be maintained
at a vertical clearance of
not less than 8 feet over
all or any portions of buildings and structures, except that service drops of 0-300 volts may be less
than 8 feet, but not less than
12 inches, above the cornice, decorative appendage, eave, roof or
parapet wall of the building served provided:
The
current carrying service conductors are insulated for the voltage being
supplied (see Rule 20.8-G), and the point of attachment of the service drops is
not more than 18 inches back of the front face of the building wall facing the
pole line from which the service drops originate.
Service drops are not required to clear buildings
any specified horizontal distance but shall be so installed that they
clear fire escapes exits, windows, doors and other points at which human
contact might be expected a horizontal distance of not less than 3 feet.
Where
service drop crosses over metallic or non-metallic nonwalkable overhang or
patio cover vertical clearance may be less than 8 feet, but not less than 24
inches providing such service drops consist of abrasion-resistant cables having
a
Service drops are not
required to clear buildings any specified horizontal distance but shall be so
installed that they clear fire escapes, exits, windows, doors and other points
at which human contact might be expected, a horizontal distance of not less
than 3 feet. Where attached to the
surface of buildings the installation shall be made in accordance with the
Electrical Safety Orders of the Industrial Accident Commission, effective May
1, 1934.
b) Horizontal Clearances: Service drops are not required to clear buildings by any specific horizontal distance.
EXCEPTION:
A
horizontal distance of not less than 3 feet should be maintained around fire
escapes, exits, windows or doors. Residential Premises: On premises used
for residential purpose only, service drops of 300-750 volts shall be
maintained at a vertical clearance of not less than 8 feet over all buildings
and structures.
The clearance
above buildings of service drops of 0-300 volts shall be not less than the
distance specified in Table 10.
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a. 3/8
pitch is a approximately 37 degrees from the horizontal.
b. No
limit specified but the greatest clearance should be obtained.
c.
Where insulated abrasion-resistant
conductors are may be reduced to 12 inches.
On
premises used for residential purposes only the clearance above building of
service drops of 0-300 volts may be less than the distance specified in Table
10 but not less than 12 inches over the building served nor less than 24 inches
above other buildings on the premises served, provided:
The
current-carrying conductors consist of abrasion-resistant cable having a
grounded metallic sheath or neutral supported service drop cable manufactured in
accordance with Standard No. WC-%-1961 or Standard No. WC-3-1959 of the
National Electric Manufactures Association and are insulated for the voltage
being supplied and the roof is metallic or nonmetallic, nonwalkable over hang
or patio cover.
Service Drops are not required
to clear buildings on residential premises any specified horizontal distance,
but shall be so installed that they clear fire escapes, exits, windows, doors,
and other points at which human contact might be expected, a horizontal distance
of not less than 3 feet. Service drops
above a horizontal plane through the top extremity of an opening should
maintain the maximum practical radial clearance, which in no event shall be
less than 1 foot.
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Table 10: Minimum Allowable Clearance of Service Drops of 0 - 750 Volts from Buildings |
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Minimum Clearance from Buildings |
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Weather Resistant Covered Conductors
0 - 750 Volts |
Insulated Conductors (Rule 20.8–G )
0 - 750 Volts |
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Vertical Clearances Above: |
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1) All portions of buildings including metallic or non–metallic cornice, decorative appendage, eaves, roof or parapet wall of the building served. |
8 Feet |
(a) (b) |
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2) Metallic or non–metallic non–walkable overhang, patio cover. |
8 Feet |
(a) (b) |
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3) Other buildings on the same premises. |
8 Feet |
2 Feet |
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4) Buildings on other premises. |
8 Feet |
8 Feet (c) |
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Horizontal & Radial Clearances: |
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1) From fire escapes, exits, windows and doors. |
3 Feet |
3 Feet |
a. No limit specified but the greatest practicable clearance should be obtained.
b. The point of attachment of the service drop for industrial and commercial premises is not to be more than 18 inches back of the front face of the building wall facing the pole line from which the service drop originates.
c. Reduce to 2 feet for non–metallic roofs, more than 3/8 pitch (approximately 37 degrees from horizontal, see sketch)
(5)
Over Swimming Pools: (See Rule 54.4-A3 54.4-A4
and Fig 54-1)
NOTE: Portions Of This Rule Have Been Revised And Moved To Rule 54.4-A4.
Final Version
Rule 54.8-B
54.8-B. Clearances Above Ground, Buildings, Etc.
(1)
Above Public Thoroughfares: Service drop conductors shall
have a vertical clearance of not less than 18 feet above public thoroughfares,
except that this clearance may grade from 18 feet at a position not more
than 12 feet horizontally from the curb line to a clearance of not less
than 16 feet at the curb line, provided the clearance at the centerline
of any public thoroughfare shall in no case be less than 18 feet. Where there
are no curbs the foregoing provisions shall apply using the outer limits
of possible vehicular movement in lieu of a curb line.
(2) Above Private Thoroughfares and Other Private Property:
a) Industrial or Commercial Premises: Over private driveways, lanes, or other private property areas accessible to vehicles on premises used for industrial or commercial purpose, service drops shall have a vertical clearance of not less than 16 feet.
b) Residential Premises: Over private driveways or lanes or other premises used for residential purpose only, service drops shall have a vertical clearance not less than 12 feet. EXPECTION: This clearance may be reduced for insulated services that conform with Rule 20.8-G to not less than 10 feet.
(3)
Above Ground in Areas Accessible to
Pedestrians Only:
Over areas
accessible to pedestrians only on service drops shall be maintained at a
vertical clearance of not less than 12 feet.
EXCEPTION: This clearance insulated services that conform withRule 20.8-G to not less than 8 feet 6 inches.
(4) From Buildings and Structures: Service drops should be arranged so as to hamper or endanger workers and firefighters while performing their duties.
a) Vertical Clearances: Service drop vertical clearances shall be maintained over all portions of buildings and structures as required by Table 10.
b) Horizontal Clearances: Service drops are not required to clear buildings by any specific horizontal distance.
EXCEPTION: A horizontal distance of not less than 3 feet should be maintained around fire escapes, exits, windows or doors.
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Table 10: Minimum Allowable Clearance of Service Drops of 0 - 750 Volts from Buildings |
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Minimum Clearance from Buildings |
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Weather Resistant Covered Conductors
0 - 750 Volts |
Insulated Conductors
0 - 750 Volts |
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Vertical Clearances Above: |
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1) All portions of buildings including metallic or non–metallic cornice, decorative appendage, eaves, roof or parapet wall of the building served. |
8 Feet |
(a) (b) |
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2) Metallic or non–metallic non–walkable overhang, patio cover. |
8 Feet |
(a) (b) |
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3) Other buildings on the same premises. |
8 Feet |
2 Feet |
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4) Buildings on other premises. |
8 Feet |
8 Feet (c) |
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Horizontal & Radial Clearances: |
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1) From fire escapes, exits, windows and doors. |
3 Feet |
3 Feet |
a. No limit specified but the greatest practicable clearance should be obtained.
b. The point of attachment of the service drop for industrial and commercial premises is not to be more than 18 inches back of the front face of the building wall facing the pole line from which the service drop originates.
c. Reduce to 2 feet for non–metallic roofs, more than 3/8 pitch (approximately 37 degrees from horizontal, see sketch)
(5) Over Swimming Pools: (See Rule 54.4-A3 and Fig 54-1)
NOTE: Portions Of This Rule Have Been Revised And Moved To Rule 54.4-A4.