Specifications - City of Montpelier, Vermont

Title:16110 – RacewaysMontpelier District HeatingCity of Montpelier, VTIssue Date:September 28, 2012Page #:9 of 10S. Raceways fastened directly to concrete, brick or block walls or concrete ceilingshall be rigidly secured by means of proper size machine screws, or bolts, andlead expansion type shields. Plastic or fiber expansion shields are not permitted.Toggle bolts may be used with hollow concrete blocks.T. Terminations: Where raceways are terminated with locknuts and bushings, alignthe raceway to enter squarely and install the locknuts with dished part against thebox. Where terminations cannot be made secure with one locknut, use twolocknuts, one inside and one outside the box.U. Where terminating in threaded hubs, screw the raceway or fitting tight into thehub so the end bears against the wire protection shoulder. Where chase nipplesare used, align the raceway so the coupling is square to the box, and tighten thechase nipple so no threads are exposed.V. Install pull wires in empty raceways. Use no. 14 AWG wire or monofilamentplastic line having not less than 200lb tensile strength. Leave not less than 12inches of slack at each end of the pull wire.W. Install raceway sealing fittings in accordance with the manufacturer's writteninstructions. Locate fittings at suitable, approved, accessible locations and fillthem with ULlisted sealing compound. For concealed raceways, install eachfitting in a flush steel box with a blank cover plate having a finish similar to thatof adjacent plates or surfaces. Install raceway sealing fittings at the followingpoints and elsewhere as indicated:1. Where conduits enter or leave hazardous locations.2. Where conduits pass from warm locations to cold locations, such as theboundaries of refrigerated spaces and airconditioned spaces.3. Where required by the NEC.X. Stubup Connections: Extend conduits through concrete floor for connection tofreestanding equipment with an adjustable top or coupling threaded inside forplugs and set flush with the finished floor. Extend conductors to equipment withrigid steel conduit; flexible metal conduit may be used 6 inches above the floor.Where equipment connections are not made under this contract, install removableflush plugs flush with floor.Y. Flexible Connections: Use short length (maximum of 6 ft.) of flexible conduit forrecessed and semirecessed lighting fixtures, for equipment subject to vibration,RACEWAYS161109