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Subchapter 7. General Industry Safety Orders
Group 20. Flammable Liquids, Gases and Vapors
Article 144. Service Stations

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§5574. Electrical Equipment.

(a) This Section shall apply to areas where Category 1 or 2 flammable liquids, or Category 3 flammable liquids with a flashpoint below 100oF (37.8oC), are stored, handled or dispensed. For areas where Category 3 flammable liquids with a flashpoint at or above 100oF (37.8oC) or Category 4 flammable liquids or liquids with a flashpoint greater than 199.4oF (93oC) (formerly designated Class IIIB Combustible liquids), are stored, handled or dispensed, the electrical equipment may be installed in accordance with the provisions of the California Electrical Safety Orders for nonclassified (ordinary) locations.
(b) All electrical equipment and wiring shall be of a type specified by and shall be installed in accordance with the California Electrical Safety Orders. All electrical equipment integral with the dispensing hose or nozzle shall be suitable for use in Division 1 locations.
(c) Table FL-9 shall be used to delineate and classify areas for the purpose of installation of electrical equipment under normal circumstances. A classified area shall not extend beyond an unpierced wall, roof or other solid partition.
(d) The area classifications listed in (c) shall be based on the premise that the installation meets the applicable requirements of these orders in all respects. (Title 24, T8-5574)
Table FL-9
Electrical Equipment Classified Areas - Service Stations
 
Class I,
Group D
Extent of
Location
Division
Classified Area
 
UNDERGROUND TANK
Fill Opening
1
Any pit, box or space below grade level, any
part of which is within the Division 1 or 2
classified area.
2
Up to 18 inches above grade level within a
horizontal radius of 10 feet from a loose fill
connection and within a horizontal radius of
5 feet from a tight fill connection.
Vent Discharging
1
Within 3 feet of open end of vent,
Upward
extending in all directions
2
Area between 3 feet and 5 feet of open end
of vent, extending in all directions.
 
DISPENSER:
Pits
1
Any pit, box or space below grade level, any
part of which is within the Division 1 or 2
classified area.
 
Dispenser enclosure
1
The area up to 4 feet vertically above the
base within the enclosure, and 18 inches
horizontally in all directions.
Outdoor
2
Up to 18 inches above grade level within 20
feet horizontally of any edge of enclosure.
INDOOR
with Mechanical
2
Up to 18 inches above grade or floor level
Ventilation
within 20 feet horizontally of any
edge of enclosure.
with Gravity Ventilation
2
Up to 18 inches above grade or floor level
within 25 feet horizontally of any edge of
enclosure.
DISPENSING UNITS,
OVERHEAD TYPE
1
Within the dispenser enclosure and 18 in
ches in all directions from the enclosure
where not suitably cut off by ceiling or wall.
All electrical equipment integral with the
dispensing hose or nozzle.
2
An area extending 2 feet horizontally in all
directions beyond the Division 1 area and
extending to grade below this classified area.
2
Up to 18 inches above grade level within 20
feet horizontally measured from a point ver
tically below the edge of any dispenser
enclosure.
 
REMOTE PUMP -
OUTDOOR
1
Any pit, box or space below grade level if
any part is within a horizontal distance of 10
feet from any edge of pump.
2
Within 3 feet of any edge of pump, extending
in all directions. Also up to 18 inches above
grade level within 10 feet horizontally from
any edge of pump.
 
REMOTE PUMP -
INDOOR
1
Entire area within any pit.
2
Within 5 feet of any edge of pump, extending
in all directions Also up to 3 feet above floor
or grade level within 25 feet horizontally
from any edge of pump.
 
LUBRICATION OR
SERVICE ROOM
1
Entire area within any pit.
2
Area up to 18 inches above floor or grade
level within entire lubrication room.
 
DISPENSER FOR Liquids
2
Within 3 feet of any fill or dispensing
with a flashpoint below
point, extending in all directions.
100oF
(37.8oC) (1)
 
SPECIAL ENCLOSURE INS-
IDE BUILDING PER SEC-
TION 5567
1
Entire enclosure.
 
SALES, STORAGE AND
REST ROOMS
(2)
If there is any opening to these class-rooms
within the extent of a Division 1 area, the en-
tire room shall be classified as Division 1.
 
FOOTNOTE (1) Category 1 or 2 flammable liquids, or for Category 3 flammable liquids with a flashpoint below 100oF (37.8oC).
FOOTNOTE (2) Ordinary
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
HISTORY
1. Amendment filed 7-16-76; effective thirtieth day thereafter (Register 76, No. 29).
2. Amendment of subsection (a) and Table FL-9 (including new footnotes) and new Note filed 5-5-2014; operative 5-6-2014 pursuant to Government Code section 11343.4(b)(3) (Register 2014, No. 19).

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