Project Name: NortraxSection 260534
Project No: 13-013 CONDUITS, CONDUIT FASTENINGS AND CONDUIT FITTINGS
Page 1
1General
1.1REFERENCES
.1Canadian Standards Association (CSA)
.1CAN/CSA C22.2 No.18-92, Outlet Boxes, Conduit Boxes, and Fittings.
.2CSA C22.2 No.45-M1981(R1992), Rigid Metal Conduit.
.3CSA C22.2 No.56-1977(R1977), Flexible Metal Conduit and Liquid-Tight Flexible Metal Conduit.
.4CSA C22.2 No.83-M1985(R1992), Electrical Metallic Tubing.
.5CSA C22.2 No.211.2-M1984(R1992), Rigid PVC (Unplasticized) Conduit.
.6CAN/CSA C22.2 No.227.3-M91, Flexible Nonmetallic Tubing.
2Products
2.1CONDUITS
.1Rigid metal conduit: to CSA C22.2 No.45, galvanized steel threaded, size as indicated.
.2Electrical metallic tubing (EMT): to CSA C22.2 No.83, with couplings with expanded ends as required, size as indicated.
.4Rigid pvc (unplastisized) conduit: to CSA C22.2 No.211.2, for exposed, above ground work, size as indicated.
.5Flexible metal conduit: to CSA C22.2 No.56, liquid-tight flexible metal.
.6Rigid PVC conduit, Type DB2 for direct burial or masonry and concrete embedment, to CSA C22.2, No. 211.1, size as indicated.
.7Flexible pvc conduit: to CAN/CSA C22.2 No.227.3, .
2.2CONDUIT FASTENINGS
.1One hole malleable iron steel straps to secure surface conduits (NPS 2) (2”) 50 mm and smaller. Two hole steel straps for conduits larger than (NPS 2) (2”) 50 mm.
.2Beam clamps to secure conduits to exposed steel work.
.3Channel type supports for two or more conduits.
.4Threaded rods, 6 mm dia., to support suspended channels.
2.3CONDUIT FITTINGS
.1Fittings: manufactured for use with conduit specified. Coating: same as conduit.
.2Factory "ells" where 90° bends are required for (NPS 1) (2”) 25 mm and larger conduits.
.3Watertight connectors and couplings for EMT above 1.5” (37 mm). Set-screws are connectors for conduits 1.5” (37 mm) and smaller.
2.4EXPANSION FITTINGS FOR RIGID CONDUIT
.1Weatherproof expansion fittings with internal bonding assembly suitable for 100 mm linear expansion.
.2Watertight expansion fittings with integral bonding jumper suitable for linear expansion and 19 mm deflection in all directions.
.3Weatherproof expansion fittings for linear expansion at entry to panel.
2.5FISH CORD
.15 mm Polypropylene. Conduits above 75 mm are to have two (2) fish cords.
3Execution
3.1INSTALLATION
.1Install conduits to conserve headroom in exposed locations and cause minimum interference in spaces through which they pass. Do not obstruct ceiling access openings.
.2Conceal conduits except in mechanical and electrical service rooms in unfinished areas.
.3Use rigid galvanized steel threaded conduit except where specified otherwise.
.4Use electrical metallic tubing (EMT) except in cast concrete above 2.4 m not subject to mechanical injury.
.5Use rigid PVC conduit underground. Type DB2 underground as indicated. Provide separate ground wire.
.6Use flexible metal conduit for connection to motors in dry areas.
.7Use liquid tight flexible metal conduit for connection to motors or vibrating equipment in damp, wet or corrosive locations.
.8Use explosion proof flexible connection for connection to explosion proof motors.
.9Install conduit sealing fittings in hazardous areas. Fill with compound.
.10Minimum conduit size for lighting and power circuits: (NPS ¾”) 19 mm.
.12Bend conduit cold. Replace conduit if kinked or flattened more than 1/10th of its original diameter.
.13Mechanically bend steel conduit over 19 mm dia.
.14Field threads on rigid conduit must be of sufficient length to draw conduits up tight.
.15Install nylon fish cord in empty conduits and terminate under screw leaving (12”) 305 mm slack. Top fish wire identifying sytem.
.16Run 2-(NPS 1”) 25 mm spare conduits up to ceiling space from each flush panel. Terminate these conduits in 152 x 152 x 102 mm junction boxes in ceiling space or in case of an exposed concrete slab, terminate each conduit in flush concrete surface type box.
.17Remove and replace blocked conduit sections. Do not use liquids to clean out conduits.
.18Dry conduits out before installing wire.
.19A ground wire must be installed in all conduits.
3.2SURFACE CONDUITS
.1Run parallel or perpendicular to building lines.
.2Locate conduits behind infrared or gas fired heaters with 1.5 m clearance.
.3Run conduits in flanged portion of structural steel.
.4Group conduits wherever possible on suspended surface channels.
.5Do not pass conduits through structural members except as indicated.
.6Do not locate conduits less than (3”) 75 mm parallel to steam or hot water lines with minimum of (1”) 25 mm at crossovers.
.7Do not pass conduits through exit stair shafts unless it is uncombustible and it serves electrical equipment within the stairwell.
3.3CONCEALED CONDUITS
.1Run parallel or perpendicular to building lines.
.2Do not install horizontal runs in masonry walls.
.3Do not install conduits in terrazzo or concrete toppings.
3.4CONDUITS IN CAST-IN-PLACE CONCRETE
.1Locate to suit reinforcing steel. Install in centre one third of slab.
.2Protect conduits from damage where they stub out of concrete.
.3Install sleeves where conduits pass through slab or wall.
.4Provide oversized sleeve for conduits passing through waterproof membrane, before membrane is installed. Use cold mastic between sleeve and conduit.
.5Do not place conduits is slabs in which slab thickness is less than 4 times conduit diameter.
.6Encase conduits completely in concrete with minimum 25 mm concrete cover.
.7Organize conduits in slab to minimize cross-overs.
.8Conduits shall not be used in poured concrete unless specifically indicated on drawings.
3.5CONDUITS IN CAST-IN-PLACE SLABS ON GRADE
.1Run conduits (NPS 1”) 25 mm and larger below slab and encased in 75 mm concrete envelope. Provide 50 mm of sand over concrete envelope below floor slab.
.2Conduits shall not be used in poured slabs unless specifically indicated on drawings.
3.6CONDUITS UNDERGROUND
.1Slope conduits to provide drainage.
.2Waterproof joints (PVC excepted) with heavy coat of bituminous paint.
3.7WORKMANSHIP
.1Any conduit or cable which is not, in the opinion of the Architect (Consultant), installed as good workmanship would call for, shall be taken out and replaced with no charge to the Contract price.
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