Specifications

Draper Prison Wasatch & Oquirrh Intercom & Paging System Remodel 4-21-2014
CONDUCTORS AND CABLES 260120 – 5
unless specifically noted otherwise, if each circuit is from a different phase (a or b).
3.5 NEUTRAL CONDUCTORS:
A. LINE-TO-NEUTRAL BRANCH CIRCUITS: Provide a dedicated neutral for each line-to-neutral
branch circuit. Size the neutral conductor the same as the phase conductor. In each outlet or
junction box containing multiple neutral conductors, tag each neutral to identify which circuit it
serves.
3.6 VOLTAGE DROP:
A. Provide branch circuit conductors in sizes such that voltage drop for branch circuits do not
exceed 3 percent at the farthest outlet. Provide service, feeder, and branch circuit conductors
so that the voltage drop on the entire electrical system does not exceed 5 percent at the farthest
outlet. This shall be strictly followed regardless of the conductor sizes indicated on the electrical
drawings. Increase conductor sizes (and conduits where necessary to comply with NEC
conduit fill requirements) as necessary to accommodate this requirement. Calculations shall be
based on the following:
1. Lighting Branch Circuits: Connected load plus 25% spare.
2. Appliance and Equipment Branch Circuits: Nameplate or NEC required load.
3. 120V Convenience Outlet Branch Circuits: 12 amps minimum, but in no case less than
NEC loading requirements. Use the following schedule:
Distance (feet) Wire Size (AWG)
0-80 #12
81-125 #10
126-200 #8
201-320 #6
4. Use the NEC method to calculate voltage drop.
3.7 CONNECTIONS:
A. Tighten electrical connectors and terminals according to manufacturer's published torque-
tightening values. If manufacturer's torque values are not indicated, use those specified in UL
486A and UL 486B.
B. Make splices and taps that are compatible with conductor material and that possess equivalent
or better mechanical strength and insulation ratings than unspliced conductors.
C. Wiring at Outlets: Install conductor at each outlet, with at least 6 inches (150 mm) of slack. Use
pig tails when wiring outlets.
3.8 FIELD QUALITY CONTROL:
A. Testing: Perform the following field quality-control testing:
1. Visual and Mechanical Inspection:
a. Inspect cables for physical damage and proper connection in accordance with
the electrical construction documents.
b. Test cable mechanical connections to manufacturer’s recommended values with
a calibrated torque wrench.
c. Check cable color coding for compliance with electrical specifications.
Bid DA14027DFCM
5/30/2014 2:08 PM p. 82