Specifications - City of Montpelier, Vermont

Title:16110 – RacewaysMontpelier District HeatingCity of Montpelier, VTIssue Date:September 28, 2012Page #:7 of 103.2 INSTALLATION3. Exposed: electrical metallic tubing, unless otherwise noted.4. Concealed: electrical metallic tubing.A. General: Install electrical raceways in accordance with manufacturer's writteninstallation instructions and applicable requirements of NEC.B. Conceal Conduit and EMT, unless indicated otherwise, within finished walls,ceilings, and floors. Keep raceways at least 6 inches away from parallel runs offlues and steam or hot water pipes. Install raceways level and square and atproper elevations.C. Elevation of Raceway: Install horizontal raceway runs above water and steampiping.D. Provide supports for raceways as specified elsewhere in Division 16.E. Prevent foreign matter from entering raceways by using temporary closureprotection.F. Protect stubups from damage where conduits rise from floor slabs. Arrange socurved portion of bends is not visible above the finished slab.G. Make bends and offsets so the inside diameter is not effectively reduced. Unlessotherwise indicated, keep the legs of a bend in the same plane and the straight legsof offsets parallel.H. Run concealed raceways with a minimum of bends in the shortest practicaldistance considering the type of building construction and obstructions except asotherwise indicated.I. Raceways embedded in slabs: Install in middle third of the slab thickness wherepractical and leave at least 1 inch concrete cover. Tie raceways to reinforcingrods or otherwise secure them to prevent sagging or shifting during concreteplacement. Space raceways laterally to prevent voids in the concrete. Runconduit larger than 1inch trade size, parallel with or at right angles to the mainreinforcement; where at right angles to the reinforcement, the conduit shall beclose to one of the supports of the slab. Where nonmetallic conduit is used,raceways must be converted to rigid steel conduit or electrical metallic tubingbefore rising above floor.RACEWAYS161107