Specifications - City of Montpelier, Vermont

Title:Montpelier District Heating16100 – Site ElectricalCity of Montpelier, VTIssue Date:September 28, 2012Page #:4 of 8A. Rigid nonmetallic conduit shall be PVC or HDPE, Schedule 80 pipe.1. Pipe shall be capable of being installed by direct bury, stitching, plowing,trenching, or directional boring methods.2. Pipe shall be GREY in color.3. Pipe shall be marked on the outside surface indicating the manufacturer’sname, size of conduit, type of material, UL Listing, and any additionalmarkings required by NEC requirements.4. All connection to existing pipe shall consist of PVC pipe of the samediameter of the pipe being connected to. Conduit from existing pipeconnection points shall remain PVC into the nearest handhole.B. Fittings shall be from the same manufacturer as the PVC or HDPE conduit, andbe approved by the manufacture for use on PVC or HDPE pipe as a leakfreeconnections. Butt Fusion joining process is an approved method of connection inlieu of fittings for HDPE pipe.C. All bends along hot water pipe alignments shall consist of longradius sweeps.Sweeps shall be shop or fieldfabricated using heat and a forming methoddetermined by the CONTRACTOR. All sweeps shall have a minimum bendradius of 60” (5’), regardless of conduit pipe size.D. Factory bends may be used in lieu of sweeps to bring conduit vertically up intohandholes. The total measurement of all factory bends on a segment of conduitpipe between handholes shall not exceed 360degrees. If the total measurementof all factory bends exceed 360degrees, the CONTRACTOR shall utilize longradius sweeps in place of factory bends as summarized in Part 2.2 (C) of thisSection.E. Factory bends shall have a minimum radius of 18”.F. Nonmetallic bell ends shall be installed on all ends of conduit pipe. Bell endsshall be sized appropriately for the nonmetallic conduit being used forinstallation.G. Upon completion of installation, the CONTRACTOR shall install nylon pullstring for each conduit run. The pull string shall be of sufficient strength tohandle up to 1250 lbs of pull force.2.3 FIBER OPTIC CABLEA. Fiber Optic cable shall be multimode fiber that complies with or exceeds thefollowing specifications:1. IEC 60793210: Type A1b Optical Fiber2. TIA/EIA492AAAAASITE ELECTRICAL161004