Specifications - City of Montpelier, Vermont

Montpelier District HeatingCity of Montpelier, VTIssue Date:September 28, 2012Title:15900 – Direct Digital Control SystemPage #:32 of 40switched power conductors do not run in the same wireway as the interposingrelay coil power or any other energy limited low voltage conductors.9. Splicing shall be minimized and shall be done only in accessible outlet, junction,or cabinet boxes that are clearly shown on the AsBuilt Record drawings.Splicing shall be made with Minnesota Mining & Mfg. Co. "Scotchloc" springconnectors with steel cap and PVC insulation, Thomas & Betts or approvedequal. When splicing is necessary the insulation colors shall match and theconductors shall be mechanically secured to each other so that no stress shall beapplied to the splice. Splicing in long runs shall be accomplished by a fullyinsulated crimped barrel connector.10. Wire pulls by powered mechanical means will not be permitted. Conduit shallbe cleaned of foreign material just before pulling the wire or cable. Lubricantsshall be compounds specifically prepared for cable pulling and shall not containpetroleum or other products that will affect cable insulation.11. Wire that has scrapes, nicks, gouges, or crushed insulation shall not be used andshall be removed.12. Groups of conductors, where installed in cabinets and wire trays, shall be neatlygrouped with wire ties or equal.13. All wire termination’s shall be made bare to screw terminals specificallydesigned for bare wire connection or shall be made with T&B "StaKon" (orequivalent) selfinsulated, spade lugs where connected to screw type terminalsnot specifically designed for bare stranded wire connection.14. All wire shall be new and brought on the jobsite in original packages bearingUnderwriter's label and the date of manufacture.15. No conduit shall be filled such that the maximum bundled cross sectionaldimension exceeds 40 % of conduit inside diameter. No raceway shall be filledto more than 40% and maximum fill for "wiremold" (surface raceway) shall be20%. Minimum conduit size shall be ¾”.16. No wire run or circuit shall be longer than 80% of the maximum allowablelength or power consumption for the wire size and application. No outputcircuit shall exceed 80% of the maximum load capacity specified by themanufacturer.17. The basic wiring method shall be in installed conduit unless otherwisepermitted. All concealed wiring shall be installed in conduit. All permitted openwiring shall be plenum rated. Permitted open wiring is limited to the followingapplications and shall be installed as describeda. Wiring from a zone air flow terminal control unit to a nearby watercontrol valve not to exceed 6 feet.b. Wiring from any controller to a device which has otherwise has beenapproved for installation and cannot accept conduit connection. Conduitshall be used to within 12 inches of the device.DIRECT DIGITAL CONTROL SYSTEMS1597232