Fire Code of the Philippines Ebook - SafetySignsPH.com Fire Code of the Philippines eBook - SafetySignsPH | Page 424

3. Bare terminals of transformers, switches, motor controllers, and other
equipment shall be enclosed to prevent accidental contact with
energized parts. Enclosures for use in tunnels shall be rain tight,
rainproof, or watertight as defined in NFPA 70, National Electrical
Code, where necessitated by the environmental conditions.
4. Special attention shall be given to maintaining clear access and
adequate workspace around electrical equipment in accordance
with NFPA 70E, Standard for Electrical Safety Requirements for
Employee Workplaces. Proper housekeeping shall be maintained to
avoid fire hazards.
5. All non-energized metal parts of electrical equipment and metal
raceways and cable sheaths shall be grounded and bonded to all
metal pipes and rails at the portal and at intervals not exceeding three
hundred five meters (305 m) throughout the tunnel.
C. Hazardous Operations and Procedures
1. The quantity of combustible materials to be used underground shall be
kept to a minimum. Advance planning shall provide for the use of
materials having the most favorable combination of high ignition
points, low rates of combustion, and low emissions of smoke and
harmful gases. Class I flammable liquids shall not be taken, stored, or
used underground or within thirty meters (30 m) of a tunnel portal or
shaft opening. Class II and Class III liquids shall be transported and
stored in approved closed containers, safety cans, or tanks. Quantities
shall be limited to those necessary for one work shift.
1. Lubricating oils, greases, and rope dressings taken underground shall
be in closed and enclosable approved containers that do not allow
the contents to leak or spill.
2. Oil, grease, and diesel fuel stored underground shall be kept in tightly
sealed containers in fire-resistant areas located at least thirty meters
(30 m) from shafts and inclines. Storage areas shall be positioned or
diked so that the contents of ruptured or overturned containers
cannot flow from the storage area.
3. Areas within eight meters (8 m) of major electrical installations and
unburied tanks for storage of combustible liquids shall be free of
transient combustible materials.
4. Fan houses, fan bulkheads for main and booster fans, and air ducts
connecting main fans to underground opening shall be constructed of
noncombustible materials.
D. No combustible structure shall be erected and no combustible materials
shall be stored within thirty meters (30 m) of an access shaft, shaft hoist, or
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