3.1.2
Underground Piping
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NOTE: Coordinate selections with drawings.
Restraint of the riser under the floor will be
detailed on the drawings to be consistent with the
description included here.
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The fire protection water main shall be laid, and joints anchored, in
accordance with NFPA 24. Minimum depth of cover shall be [1] [_____] m [3]
[_____] feet. The supply line shall terminate inside the building with a
flanged piece, the bottom of which shall be set not less than 150 mm 6
inches) above the finished floor. A blind flange shall be installed
temporarily on top of the flanged piece to prevent the entrance of foreign
matter into the supply line. A concrete thrust block shall be provided at
the elbow where the pipe turns up toward the floor. In addition, joints
shall be anchored in accordance with NFPA 24 using pipe clamps and steel
rods from the elbow to the flange above the floor and from the elbow to a
pipe clamp in the horizontal run of pipe. Buried steel components shall be
coated with a bituminous material.
3.2
EXCAVATION, TRENCHING AND BACKFILLING
Earthwork shall be performed in accordance with applicable provisions of
Section 02300 EARTHWORK.
3.3
ELECTRICAL WORK
Unless otherwise specified, power supply equipment and wiring shall be in
accordance with Section 16402 INTERIOR DISTRIBUTION SYSTEM.
3.3.1
Overcurrent and Surge Protection
Equipment connected to alternating current circuits shall be protected from
surges per IEEE C62.41 and NFPA 70. Cables and conductors which serve as
communication links, except fiber optics, shall have surge protection
circuits installed at each end. Fuses shall not be used for surge
protection.
3.3.2
Grounding
Grounding shall be provided to building ground.
3.3.3
Wiring
System field wiring shall be installed in 20 mm 3/4 inch minimum diameter
electrical metallic tubing or metallic conduit. Wiring for the sprinkler
system fire detection and control system shall be installed in tubing or
conduits dedicated for that use only and shall not be installed in conduit,
outlet boxes or junction boxes which contain lighting and power wiring or
equipment. Circuit conductors entering or leaving any mounting box, outlet
box enclosure or cabinet shall be connected to screw terminals with each
terminal marked and labeled in accordance with the wiring diagram. No more
than one conductor shall be installed under any screw terminal.
Connections and splices shall be made using screw terminal blocks. The use
of wire nut type connectors is not permitted. Wiring within any control
equipment shall be readily accessible without removing any component parts.
Conductors shall be color coded and shall be identified within each
SECTION 13955A
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