TranSystems Corporation - LGM Construction

501070099 Federal Express Oakland Sort Expansion Issued for Bid 10/11
1. Exposed Aboveground Conduit: Rigid galvanized steel where less than 10’ above finished floor.
10’ or higher above finished floor: rigid galvanized steel for conduit sizes 2” and smaller,
intermediate metal conduit for sizes larger than 2”. EMT with compression fittings may be used in
dry areas within the roof structure.
2. Underground Conduit: RNC, Type EPC-40-PVC, with PVC-coated rigid galvanized steel elbows.
All conduit transitions from below-grade to above-grade shall be made with PVC-coated rigid
galvanized steel conduit.
3. Concealed Conduit Aboveground: Unless noted otherwise, EMT with compression fittings.
4. Connection to Vibrating Equipment (Including Transformers and Hydraulic, Pneumatic, Electric
Solenoid, or Motor-Driven Equipment): LFMC.
5. Boxes and Enclosures, Aboveground: NEMA 250 “Enclosures for Electrical Equipment (1000 Volts
Max)”, Type 12 in dry areas, Type 4 in wet areas.
B. Minimum Raceway Size, above grade: 3/4-inch (21-mm) trade size.
C. Minimum Raceway Size, below grade: 1” (25mm) trade size.
3.2 INSTALLATION
A. Keep raceways at least 6 inches (150 mm) away from parallel runs of flues and steam or hot-water pipes.
Install horizontal raceway runs above water and steam piping.
B. Complete raceway installation before starting conductor installation.
C. Support raceways as specified in Division 16 Section "Electrical Supports and Seismic Restraints."
D. Arrange stub-ups so curved portions of bends are not visible above the finished slab.
E. Install no more than the equivalent of three 90-degree bends in any conduit run.
F. Conceal conduit and EMT within finished walls, ceilings, and floors, unless otherwise indicated.
G. Raceway Terminations at Locations Subject to Moisture or Vibration: Use insulating bushings to protect
conductors, including conductors smaller than No. 4 AWG.
H. Install pull wires in empty raceways. Use polypropylene or monofilament plastic line with not less than
200-lb (90-kg) tensile strength. Leave at least 12 inches (300 mm) of slack at each end of pull wire.
I. Install raceway sealing fittings at suitable, approved, and accessible locations and fill them with listed
sealing compound. For concealed raceways, install each fitting in a flush steel box with a blank cover
plate having a finish similar to that of adjacent plates or surfaces. Install raceway sealing fittings where
required by California Electrical Code.
J. Flexible Conduit Connections: Use maximum of 36 inches (915 mm) of flexible conduit for equipment
subject to vibration, noise transmission, or movement; and for transformers and motors.
K. Recessed Boxes in Masonry Walls: Saw-cut opening for box in center of cell of masonry block, and install
box flush with surface of wall.
L. Set metal floor boxes level and flush with finished floor surface.
RACEWAYS AND BOXES 16130 - 3