Bid Package 08 North Well Field - Garney Construction

Colorado River Municipal Water District
Raw Water Supply Well Sites
Ward County North Well Field
13. For conductors that will be connected by others, provide at least 6 feet spare
conductors in free standing panels and at least 2 feet spare in other assemblies.
Provide additional spare conductor in any particular assembly where it is obvious
that more conductor will be needed to reach the termination point.
B. SPLICES
1. Power Conductors: Splice in junction boxes or at outlets only for lighting and
receptacle branch circuits. Splices for all other circuits shall be disallowed. All
splices are subject to the Engineer’s approval. Obtain approval from Engineer
before installing any splices.
a. For existing installations, splices of 120V circuits shall use twist-on wire
nuts.
b. For splices of existing 480V circuits, the Contractor shall terminate the
existing and new conductors using power distribution blocks mounted in
a junction box.
2. Control and Instrumentation Conductors: No splicing of control and
instrumentation conductors shall be permitted between terminal points except as
specifically indicated on the plans.
3. No splicing of conductors shall be performed in any below ground structure.
4. Condulet type fittings shall not contain splices. Under no condition shall
conductors of a different color be spliced together.
5. For No. 10 and smaller, connect conductors with a twist-on spring wirenut. If a
splice or tap is below 3' above the final grade, fill the spring connectors with an
electrical insulating resin so that the resin encapsulates conductor and spring
materials. Conductor splices and taps inside the MCC, VFDs, panels, etc. shall
be on the terminal strips or power distribution blocks.
6. For No. 8 and larger, connect conductors with a split bolt type of connector or a
mechanical, set screw type connector. Wrap splices and taps with a single halflapped
layer or rubber tape followed by successive layers of vinyl tape until a
vinyl tape layer thickness of twice the original conductor insulation thickness is
achieved. If splice or tap is below 3' above the finished grade, the tape or splice
shall have a final outer coating or insulating resin.
C. TERMINATIONS
1. Conductors terminated on a screw termination shall have a crimp on type spade
connector applied on the wire end, Panduit PanTerm or approved equal.
2. Furnish and install power distribution blocks as required for tapping conductors
at their load connection point with conductors of smaller size. Install power
distribution blocks with the number of poles and sizes needed for connecting the
phase, neutral, and ground conductors.
3. Tighten all screws and terminal bolts using torque type wrenches and/or drivers
to tighten to the inch-pound requirements of the NEC and UL.
4. Use crimp connectors on all stranded conductors.
5. Soldered mechanical joints insulated with tape will not be acceptable.
6. SINGLE CONDUCTORS: Sufficient wire shall be left at outlets to make
connections to equipment without straining. Light switches and receptacles shall
be connected with pig-tails and crimp-on connectors.
May 18, 2012
Low Voltage Electrical Power Conductors & Cables
Revision 0 26 05 19-6