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PART 3 - EXECUTION
<br />3.01 INSTALLATION
<br />A.General: The electrical installation shall conform to the requirements of NFPA 70, "National Electrical
<br />Code," and to the requirements specified herein.
<br />B.Wiring Method: The wiring method shall be as follows, except as otherwise noted.
<br />1.Exterior:
<br />a.Exposed: Rigid steel conduit.
<br />b.Concealed: Rigid steel conduit.
<br />1)In or under slab on grade: Nonmetallic conduit, Schedule 40 PVC. Conduit leaving the
<br />slab (including exposed conduit riser) shall be rigid steel conduit.
<br />2)Underground: Rigid nonmetallic conduit. Use Schedule 40 PVC. Provide concrete
<br />encasement as indicated.
<br />c.Connection to vibrating equipment, including transformers and hydraulic, pneumatic, or
<br />electric solenoid or motor-driven equipment: Liquidtight flexible metal conduit, maximum
<br />length 18".
<br />2.Interior:
<br />a.Exposed: Electrical metallic tubing.
<br />1)Areas where exposed conduit may be subject to physical damage: Rigid metal conduit.
<br />2)Damp or wet locations: Rigid metal conduit.
<br />3)Classified locations: Rigid metal conduit.
<br />b.Concealed: Electrical metallic tubing.
<br />1)In or under slab on grade: Nonmetallic conduit, Schedule 40 PVC. Conduit leaving the
<br />slab (including exposed conduit riser) shall be rigid steel conduit.
<br />2)In slab, above grade: Rigid nonmetallic conduit Schedule 40 PVC. Maximum size conduit
<br />in slab: 1".
<br />c.Connection to vibrating equipment, including transformers and hydraulic, pneumatic, or
<br />electric solenoid or motor-driven equipment: Flexible metal conduit, maximum length 18".
<br />1)For moist or humid locations or corrosive atmosphere, or where subject to water spray or
<br />dripping oil, grease, or water: Liquidtight flexible metal conduit.
<br />d.Connection to lighting fixtures located in suspended acoustical or metal ceilings: Flexible
<br />metal conduit, maximum length 72".
<br />e.Final connections to lighting fixtures which have isolated junction boxes: Flexible metal
<br />conduit.
<br />1)Damp locations: Liquidtight flexible conduit.
<br />C.Grounding and Bonding:
<br />1.General: Grounding shall be provided in accordance with all applicable codes and regulations
<br />and the local authorities having jurisdiction.
<br />2.An equipment grounding conductor shall be provided in all raceway containing phase
<br />conductors.
<br />3.The maximum resistance to ground shall not exceed 5 ohms.
<br />D.Raceway Installation:
<br />1.General Requirements: Install electrical raceways in accordance with manufacturer's written
<br />installation instructions, applicable requirements of NEC, and as follows.
<br />a.Minimum size: 3/4" unless otherwise indicated.
<br />b.Size conduits as indicated on the drawings and as required by the NEC for the number and
<br />sizes of wires to be installed into the conduit.
<br />c.Make conduit field cuts square with saw and ream out to full size. Shoulder conduits in
<br />couplings. Remove burrs, and swab inside conduits before conductors are pulled in.
<br />d.Make all conduit joints mechanically tight, electrically continuous, and watertight. Pitch
<br />conduits in a manner to avoid creating moisture traps.
<br />e.Install minimum 1/8" polypropylene pull cords from end-to-end in all empty raceways, tagged
<br />with the identification of service intended and location of opposite end. Leave at least 24" of
<br />pull cord at each end.
<br />f.Restore wall, ceiling, and floor penetrations to the requirements of the Authority Having
<br />Jurisdiction.
<br />g.Communications/Signal System Raceways 2" Trade Size and Smaller: In addition to the
<br />above requirements, install raceways 2" and smaller trade size in maximum lengths at 150'-0"
<br />and with a maximum of two, 90° bends or equivalent. Install pull or junction boxes where
<br />necessary to comply with these requirements.
<br />h.Provide code sized green grounding conductor in all conduit.
<br />2.Perform excavating, trenching, backfilling, and compacting as shown, and as specified in
<br />Division 02 which prescribes excavation, backfilling and compacting for utilities. Minimum cover
<br />for runs below finished grade outside buildings: 24" except where noted.
<br />3.Complete installation of electrical raceways before starting installation of conductors within
<br />raceways.
<br />a.Protect inside of conduit from dirt and rubbish during construction by capping all openings
<br />with plastic caps intended for the purpose. Cap or plug conduits with standard manufactured
<br />accessories as soon as the conduits have been permanently installed in place.
<br />4.Install all conduits at elevations and locations to avoid interference with grading or other work,
<br />the structure, finished ceilings, walls. Avoid causing cutting of masonry structural members.
<br />a.Do not place conduits in close proximity to equipment, systems, and service lines, such as
<br />hot water supply and return lines, which could be detrimental to the conduit and its contents.
<br />Maintain a minimum 3" separation, except in crossing, which shall be a minimum 1".
<br />1)Minimum separation from uninsulated hot water pipes, steam pipes, heater flues or vents:
<br />6". Avoid running conduit directly under water lines.
<br />2)Elevation of Raceway: Where possible, install horizontal raceway runs above water and
<br />steam piping.
<br />5.Conceal conduit, unless indicated otherwise, within finished walls, ceilings, and floors. Keep
<br />raceways at least six 6" away from parallel runs of flues and steam or hot water pipes. Install
<br />raceway level and square and at proper evaluations.
<br />a.To prevent displacement, securely support and hold in place all conduits installed in advance
<br />of other work and to be concealed in the building structure. Carefully lay out conduits run
<br />within the structure, such as floors, beams, walls, to avoid densities excessive for the
<br />construction. Relocate those conduits when excessive densities occur.
<br />b.Run conduits embedded in structural slabs in the middle of the slab below the top and above
<br />the bottom reinforcing steel. Minimum cover for conduit in concrete floors, walls or roof: 1/3
<br />thickness of slab, but in no case less than 1-1/2" cover except where penetration is made. Do
<br />not install conduit larger than 1" in slabs. Tie raceways to reinforcing rods or otherwise
<br />secure them to prevent sagging or shifting during concrete placement. Space raceways
<br />laterally to prevent voids in the concrete. Where nonmetallic conduit is used, raceways must
<br />be converted to Schedule 80 or rigid steel conduit before rising above the floor.
<br />c.Where conduit installed in concrete or masonry extends across building construction joints,
<br />provide expansion fittings as manufactured by O.Z.; Crouse-Hinds; Appleton; or equal, with
<br />approved ground straps and clamps. Expansion fittings installed in concrete shall be water
<br />tight, concrete tight, deflection/expansion type.
<br />d.Run concealed raceways with a minimum of bends in the shortest practical distance
<br />considering the type of building construction and obstructions except as otherwise indicated.
<br />This does not apply to conduits in crawl spaces.
<br />6.Install and neatly rack exposed conduits parallel with and perpendicular to building walls. Do not
<br />install exposed diagonal conduit runs.
<br />a.Run exposed, parallel, or banked raceways together. Make bends in parallel or banked runs
<br />from the same center line so that the bends are parallel. Factory elbows may be used in
<br />banked runs only where they can be installed parallel. This requires that there be a change in
<br />the plane of the run such as from wall to ceiling and that the raceways be of the same size. In
<br />other cases provide field bends for parallel raceways.
<br />b.Use blockouts for concentrations of conduits in a confined area.
<br />c.Route and suspend conduits crossing expansion joints to permit expansion, contraction, and
<br />deflection utilizing approved fittings to prevent damage to the building, conduits, and
<br />supporting devices.
<br />d.Install exposed raceways parallel and perpendicular to nearby surfaces of structural
<br />members and follow the surface contours as much as practical.
<br />e.Provide conduit bodies for exposed conduit runs at junctions, bends or offsets where
<br />required. Do not use elbows or bends around outside corners of beams, walls or equipment.
<br />Make conduit body covers accessible.
<br />7.Concrete Wall or Stab Penetrations: All core drilling, sleeves, blockouts or other penetrations
<br />must be approved by the Structural Engineer prior to installation.
<br />a.Space sleeves and core drills to insure a minimum dimension of 3 times the nominal trade
<br />diameter of the largest adjacent conduit between sleeves or core drills.
<br />b.Use blockouts for concentrations of conduits in a confined area.
<br />8.Join raceways with fittings designed and approved for the purpose and make joints tight. Where
<br />joints cannot be made tight, use bonding jumpers to provide electrical continuity of the raceway
<br />system. Make raceway terminations tight. Where terminations are subject to vibration, use
<br />bonding bushings or wedges to assure electrical continuity. Where subject to vibration or
<br />dampness, use insulating bushings to protect conductors.
<br />9.Make bends and offsets so the inside diameter is not effectively reduced. Unless otherwise
<br />indicated, keep the legs of a bend in the same plane and the straight legs of offsets parallel.
<br />f.Make no bends with a radius less than 12 times the diameter of the cable it contains nor
<br />more than 90°. Make field bends with tools designed for conduit bending. Heating of metallic
<br />conduit to facilitate bending is not permitted.
<br />g.Bends and offsets in 1" and smaller conduits may be done with approved bending devices.
<br />Do not install conduits which have had their walls crushed and deformed and their surface
<br />finish damaged due to bending.
<br />c Run conduits parallel to and at right angles to building lines.
<br />d.Where space conditions prohibit the use of standard ells, elbows, and conduits, use cast
<br />ferrous alloy fittings of such forms and dimensions as best required for application.
<br />10.Surface Raceway:
<br />a.Install a separate green ground conductor in raceway from the junction box supplying the
<br />raceway to receptacle of fixture ground terminals.
<br />b.Select each surface raceway outlet box to which a lighting fixture is attached to be of
<br />sufficient diameter to provide a seat for the fixture canopy.
<br />c.Where a surface raceway is used to supply a lighting fixture having central stem suspension
<br />with a backplate and a canopy, with or without extension ring, the backplate and canopy will
<br />serve as the outlet box and no separate outlet box need be provided.
<br />d.Provide surface raceway outlet box, in addition to the backplate and canopy, at the feed-in
<br />location of each lighting fixture having end stem suspension.
<br />e.Where a surface raceway extension is made from an existing outlet box on which a lighting
<br />fixture is installed, provide a backplate slightly smaller than the fixture canopy, and no
<br />additional surface mounted outlet box need be installed.
<br />f.Surface raceways shall be securely fastened to the mounting surface. Use expansion type
<br />anchors in concrete.
<br />11.Do not run conduits exposed on the roof unless approval is obtained from the Owner prior to
<br />installation.
<br />12.Other Requirements:
<br />a.Connect motors, equipment containing motors, equipment mounted on an isolated
<br />foundation, transformers, and other equipment and devices which are subject to vibration and
<br />which require adjustment with liquidtight flexible metallic conduit from the device to the
<br />conduit serving it. Size the flexible conduit length more than 12 diameters, but less than 18
<br />diameters. Rigidly support the points of attachment on each side of the connection. Use
<br />external bonding jumpers on sizes 1-1/2" and above.
<br />b.Install escutcheons on all exposed conduits passing through interior floors, walls, or ceilings.
<br />Install fire seals on all conduits passing through fire rated partitions. Install wall and floor fire
<br />seals on all conduits passing through exterior walls and floors, or use standard galvanized
<br />steel pipe sleeves; diameters 12" greater than the outside diameter of the sleeved conduit
<br />and fill the annular space with mastic or caulk with lead.
<br />c.Fire pump room: All wiring shall be installed in rigid metal, liquidtight flexible metal conduit.
<br />d.Raceway for panelboards:
<br />1)All homeruns shown shall be run to the panel indicated independently of all other
<br />homeruns. Provide pull points so as not to exceed total bends of 270°.
<br />2)Run a minimum of one 3/4" empty conduit for every three single pole spare circuit
<br />breakers, spaces or fraction thereof and not less than two 3/4" conduits from every flush
<br />mounted panel to an accessible space above the ceiling and below the floor.
<br />e.Make conduit projections from covered areas to areas exposed to the weather watertight by
<br />proper flashing. Extend flashing a minimum of 6" in all directions from conduit.
<br />f.Cap conduits indicated to be stubbed-out underground using glued on PVC caps intended for
<br />this purpose.
<br />g.Install a coupling flush with the floor on all conduits stubbed-up through the floor slab.
<br />h.Do not penetrate walls with flexible conduit where subject to physical damage. Use recessed
<br />box with extension ring for transition from interior to exterior of wall.
<br />i.Terminations:
<br />1)Where raceways are terminated with locknuts and bushings, align the raceway to enter
<br />squarely and install the locknuts with dished part against the box. Where terminations
<br />cannot be made secure with one locknut, use two locknuts, one inside and one outside
<br />the box.
<br />2)Where terminating in threaded hubs, screw the raceway or fitting tight into the hub so the
<br />end bears against the wire protection shoulder. Where chase nipples are used, align the
<br />raceway so the coupling is square to the box, and tighten the chase nipple so no threads
<br />are exposed.
<br />3)At switchboards, manholes and floor standing distribution panelboards, provide insulated
<br />throat bushings or bell ends on all non-metallic conduit entries and bushings on all
<br />metallic conduit entries.
<br />4)Install insulated throat threaded hubs on conduits entering enclosures without threaded
<br />hubs.
<br />5)Install end bells on conduits stubbed through slabs and foundations into electrical
<br />enclosures.
<br />j.Install raceway sealing fittings in accordance with the manufacturer's written instructions.
<br />Locate fittings at suitable, approved, accessible locations and fill them with UL Listed sealing
<br />compound. For concealed raceways, install each fitting in a flush steel box with a blank cover
<br />plate having a finish similar to that of adjacent plates or surfaces. Install raceway sealing
<br />fittings at the following points and elsewhere as indicated:
<br />1)Where conduits enter or leave hazardous locations.
<br />2)Where conduits pass from warm locations to cold locations, such as the boundaries of
<br />refrigerated spaces and air conditioned spaces.
<br />3)Where required by the NEC.
<br />k.Stub-up Connections: Extend conduits through concrete floor for connection to freestanding
<br />equipment with an adjustable top or coupling threaded inside for plugs and set flush with the
<br />finished floor. Extend conductors to equipment with rigid steel conduit; flexible metal conduit
<br />may be used 6" above the floor. Where equipment connections are not made under this
<br />contract, install screwdriver operated threaded flush plugs flush with floor.
<br />1)Protect stub-ups from damage where conduits rise from floor slabs. Arrange so that
<br />curved portion of bends is not visible above the finished slab.
<br />l.Flexible Connections: Use short length (maximum of 6'-0") of flexible conduit for recessed
<br />and semi-recessed lighting fixtures, for equipment subject to vibration, noise transmission, or
<br />movement; and for all motors. Use liquidtight flexible conduit in wet locations. Install separate
<br />ground conductor across flexible connections.
<br />m.PVC Coated Rigid Steel Conduit:
<br />1)Do not store conduit in direct sunlight.
<br />2)Use pipe straps, no pipe wrenches or channel wrenches, when tightening connections to
<br />avoid damaging PVC coating.
<br />3)Patch all gouges or cuts in the PVC coating after installing conduit. Use manufacturer's
<br />recommended patching paste. Build up area to be patched to full mil thickness of coating
<br />and feather out paste on sides of damaged area a minimum of 1/2" to provide a
<br />completely bonded seal.
<br />4)Field bend conduit with shoes for a mechanical bender sized for the next larger size
<br />conduit.
<br />5)Bends used in or below concrete slabs shall be, rigid steel type elbows, use for all
<br />stub-ups with flush floor coupling at transitions.
<br />n.Use raceway fittings that are of types compatible with the associated raceway and suitable
<br />for the use and location. For intermediate steel conduit, use threaded rigid steel conduit
<br />fittings except as otherwise indicated.
<br />I.Underground Duct Banks:
<br />1.Exercise care in excavating, trenching and working near existing utilities. Trenching and backfill:
<br />a.Contractor shall trench underground duct path and manhole location with utmost care in
<br />order to avoid existing underground facilities. Trench size shall be kept to a minimum. No
<br />oversized trench shall be made unnecessarily.
<br />b.All trench excavations by the Contractor shall be backfilled by same in accordance with this
<br />specification.
<br />c.All material excavated during underground electrical work is not pre-qualified for backfill.
<br />d.All fill must be placed in layers not exceeding 8" in depth and hand tamped or machine
<br />compacted to at least 95% of its maximum dry density as computed by the ASTM method of
<br />performing a compaction test (D-1557-70).
<br />G.Lighting:
<br />1.Inspect Architectural drawings and specifications, including ceiling alternates, to determine
<br />ceiling material to be installed.
<br />2.Inspect Architectural reflected ceiling plans.
<br />3.Inspect installed ceiling components for defects affecting the quality and execution of work.
<br />4.Preparation:
<br />b.Verify ceiling material and alignment.
<br />c.Lay out exact locations of fixtures in accordance with reflected ceiling plans, fixtures' and
<br />switches' outlet boxes and supports.
<br />d.Provide outlet boxes and conduit.
<br />e.Provide appropriate hardware and fixture accessories to support from ceiling system.
<br />5.Installation:
<br />a.Installation of all lighting fixtures done by experienced electrician. Lighting fixtures not
<br />installed where finished coat of paint has been applied to ceiling and walls until paint is
<br />thoroughly dry. Verify ceiling type with architectural plan and provide all necessary framing
<br />and mounting hardware.
<br />b.Contractor to be responsible for proper coordination of all lighting fixture locations. Provide
<br />support for all lighting fixtures mounted on or recessed in hung ceiling. Confer with Ceiling
<br />Contractor and other trades to coordinate lighting systems.
<br />c.Lighting fixtures to be rigidly mounted to fixture stud in outlet boxes. Malleable iron hickeys or
<br />extension pieces provided where required.
<br />d.Provide suitable coverplate or canopy for each lighting fixture outlet box where the lighting
<br />fixture does not provide a suitable cover.
<br />e.Lighting fixtures located on exterior of building installed with cadmium plated brass screws
<br />and gasketed.
<br />f.Lighting fixture to be installed in suspended T-Bar ceiling shall be attached to the ceiling grid
<br />with an attachment device with a capacity capable to resist a force equal to the weight of the
<br />light fixture acting in any direction. Lighting fixtures shall be supported directly from the
<br />structure above by hangers capable of supporting the weight of the fixture with #12
<br />galvanized steel wire from all 4 corners.
<br />g.Verify all ceiling heights and clearances if mounting height is not indicated on plans or in
<br />lighting fixture schedule, or if lighting fixture is relocated because of a conflict with another
<br />trade. A mounting height for the lighting fixture is to be submitted for review.
<br />h.Each lighting fixture completely wired in an approved manner with #14 AWG copper stranded
<br />wire, 600 volt, with type SF-2 insulation; recessed lay-in lighting fixtures furnished with 7'-0"
<br />#14 SF wire and 6'-0" Greenfield, when installed in an air plenum.
<br />i.Circuit wiring running through the lighting fixtures to be #12 AWG with type SF insulation. No
<br />joints in the wires other than those absolutely required. Provide wires of sufficient length for
<br />making approved connections at the light outlets and at the lampholders or ballasts.
<br />j.Joints and splices within lighting fixtures to be either soldered and taped with plastic
<br />electrician's tape or secured by wire nuts or indent type lug fasteners.
<br />k.Protect the lighting fixtures from damage during their unloading or removal, storage or
<br />installation, any broken fixtures, lenses, etc., must be replaced with new parts, without any
<br />additional expense to the Owner, undue delay or inconvenience.
<br />l.Upon completion of the installation of the lighting fixtures and lighting equipment, they must
<br />be in first-class operating order and in perfect condition as to finish, etc. Check for proper
<br />operation and appearance, alignment of fixtures and proper placement of lenses, louvers,
<br />lamps and other light-controlling or modifying appurtenances.
<br />m.Where special lighting effects, flood or spotlighting is involved, perform final adjustment
<br />under the direct supervision of Architect.
<br />n.Cleaning: Immediately prior to occupancy, damp clean all lenses, lighting fixture trims,
<br />reflectors, clean lamps or install new lamps as directed, with lenses and fixtures free of
<br />labels.
<br />o.Use of Lighting Fixtures: As soon as any portion of lighting fixture work is ready for operation,
<br />the Owner shall have the right to operate under the supervision of the Contractor. This shall
<br />in no way be interpreted to mean the acceptance of such part of the installation or relieve the
<br />Contractor of his responsibility for the complete work or any part thereof.
<br />p.Color and type of finish of all lighting fixtures as approved by the Architect.
<br />q.Install fixtures and accessories in accordance with manufacturer's recommendations and
<br />industry standard practice.
<br />r.Coordinate work of this section with that of other trades.
<br />s.Provide lighting fixtures, lamps, switches, and control systems, and wiring.
<br />t.If designation omitted on drawings, provide same type fixture employed in rooms of similar
<br />usage (contact this engineer for final direction).
<br />u.Provide spacers for fixtures mounted on low density ceiling material.
<br />v.Provide plaster frames for recessed fixtures in plaster ceilings.
<br />w.Install fixtures in fiber decking and formboard so outlet boxes and openings will not be sight
<br />exposed.
<br />x.Prepare fixtures and trim required to be painted.
<br />y.Outlet boxes locations on drawings are diagrammatic only. Position outlet boxes to coincide
<br />with suspension hangers and knock-outs.
<br />z.Install in accordance with manufacturer's instructions, submittal data, and details on
<br />drawings.
<br />6.Adjustment and cleaning:
<br />a.Adjust lamp positions for desired effects.
<br />1)Align fixtures with building walls and tile joints.
<br />b.Cleaning:
<br />1)Remove dirt, grease, and foreign materials from fixtures.
<br />2)Remove fingerprints, smudges, and dirt from fixtures' lenses and lamps.
<br />3.02 FIELD QUALITY CONTROL
<br />A.Examine surfaces to which conduits are to be secured for:
<br />1.Defects which will adversely affect the execution and quality of work.
<br />2.Deviations from allowable tolerances for the building material.
<br />B.Do not start work until defects and deviations are corrected.
<br />3.03 CLEANING
<br />A.Upon completion of installations of raceways, inspect interiors of raceways; clear all blockages and
<br />remove burrs, dirt, and construction debris.
<br />3.04 PROTECTION OF FINISHED WORK
<br />A.Protect inside of conduit from dirt and rubbish during construction by capping all openings with plastic
<br />caps intended for the purpose.
<br />B.Protect stub-ups from damage where conduits rise from floor slabs. Arrange so curved portion of
<br />bends is not visible above the finished slab.
<br />3.05 GROUNDING
<br />A.Electrically ground metallic cabinets, boxes, and enclosures. Where wiring to item includes a
<br />grounding conductor, provide a grounding terminal in the interior of the cabinet, box, or enclosure.
<br />3.06 CLEANING AND FINISH REPAIR
<br />A.Upon completion of installation, inspect components. Remove burrs, dirt, and construction debris and
<br />repair damaged finish including chips, scratches, abrasions and weld marks. Clean surfaces to be
<br />painted.
<br />B.Galvanized finish: Repair damage using a zinc-rich paint recommended by the manufacturer.
<br />C.Painted finish: Repair damage using matching corrosion-inhibiting touch-up coating.
<br />e.All compacted fill will be under continuous inspection by the Inspector. Compaction tests will
<br />be arranged for by the Inspector in cooperation with the Contractor.
<br />i.Puddling or water-flooding for settling backfill will not be permitted except in landscaped
<br />areas. The addition of water shall be limited to achieving optimum moisture content for tamp
<br />procedures.
<br />f.Where Contractor trenches crosses any finished road (paved or gravel), he shall be
<br />responsible for restoring the road to its original condition. Repaving shall be with the same
<br />surrounding material and to a quality equal or exceeding its surround.
<br />g.Do not backfill for a period of at least 24 hours after pouring concrete. Upon receipt of the
<br />Inspector's approval proceed with backfill. Backfill with 1 sack slump concrete and repair of
<br />surface to be completed within 24 hours of approval. Provide wet sand backfill in landscape
<br />areas.
<br />h.Survey slope of trenches and ducts between terminations to provide drainage. No pockets
<br />shall be permitted.
<br />2.Underground Duct with Concrete Encasement:
<br />a.Underground ductbanks lines shall be constructed of individual conduits encased in concrete.
<br />Conduit shall be of PVC Schedule 40. The kind of conduit used shall not be mixed in any one
<br />duct bank. PVC ducts shall not be smaller than 2" in diameter unless otherwise indicated.
<br />The concrete encasement surrounding the bank shall be rectangular in cross-section and
<br />shall provide at least 3" of concrete outer encasement for ducts. Conduit shall be separated
<br />by a minimum concrete thickness of 2".
<br />b.The top of the concrete envelope shall not be less than 30" below grade, except that under
<br />roads and pavement it shall be not less than 36" below grade.
<br />c.Ductbanks shall have a continuous slope downward toward manholes with a pitch of not less
<br />than 1-1/2" in 100'-0". Except at conduit risers, changes in direction of runs exceeding a total
<br />of 10°, either vertically or horizontally, shall be accomplished by long sweep bends having a
<br />minimum radius of curvature of 25'-0". Sweep bends may be made of one or more curved or
<br />straight sections or combinations thereof. Manufactured bends shall have a minimum radius
<br />of 24" for use with conduits of less than 3" in diameter and a minimum radius of 48" for ducts
<br />of 3" in diameter and larger.
<br />d.PVC conduits shall terminate in end-bells where duct lines enter pullboxes or manholes.
<br />Separators shall be of precast concrete, high-impact polystyrene, steel, or any combination
<br />of these. The joints of the conduits shall be staggered by rows and layers so as to provide a
<br />duct line having maximum strength.
<br />e.During construction, partially completed duct lines shall be protected from the entrance of
<br />debris such as mud, sand, concrete and dirt by means of suitable conduit. As each section of
<br />a duct line is completed, a testing mandrel not less than 12" long with a diameter 1/4" less
<br />than the size of the conduit shall be drawn through each conduit, after which a brush having
<br />the diameter of the duct and having stiff bristles shall be drawn through the conduit until it is
<br />clear of all particles of earth, sand, or gravel. Conduit plugs shall then be immediately
<br />installed.
<br />f.Locate spacers no greater than 5'-0" center to center, along entire length of ductbank.
<br />g.Duct couplings may be placed side by side horizontally, but staggered at least 6" vertically.
<br />h.Make conduit joints in accordance with manufacturer's recommendations. In the absence of
<br />specific recommendations, make the joints as follows:
<br />1)Brush a plastic solvent cement on the inside of the coupling and on the outside of the duct
<br />ends.
<br />2)Slip duct and fitting together with a quick one-quarter turn to set the joints.
<br />i.Follow ductbank sections on the drawings for size, arrangement and spacing of ducts.
<br />j Secure ducts and spacers to prevent movement during placement of concrete.
<br />k.At connection to existing manhole, dowel the concrete encasement with one #4 reinforcing
<br />bar 36" long per duct. (Minimum of two required.)
<br />l.Provide a #2/0 soft bare copper ground conductor throughout the continuous length of
<br />ductbanks containing conductors having more than 150 volts to ground.
<br />m.Concrete; in accordance with the following:
<br />1)Provide #4 rebar dowels at each concrete joint/pour transition. A minimum of 8'-0" long #4
<br />rebar dowel, one per conduit in ductbank.
<br />2)Provide rebar and tie-downs to prevent conduits from floating to top of concrete during
<br />curing.
<br />3)Make ductbank construction monolithic top to bottom and side to side.
<br />4)Do not exceed the outside dimension of the completed ductbank by more than 1" in the
<br />vertical or 4" in the horizontal from dimensions indicated.
<br />5)Use plastic film to retain moisture for proper curing.
<br />n.Ductbank concrete may be poured without forming, provided trench walls are firm and will not
<br />cave in during installation. Unless noted otherwise, encase the raceway on all sides with a
<br />minimum of 3" of concrete.
<br />o.Where conduits are stubbed out for future connection, stop concrete 12" from end of conduit.
<br />Provide a waterproof cap on the end of the conduit.
<br />p.The top of the concrete ductbank shall be as shown on the drawings, or as otherwise
<br />required by code and as required to coordinate with other underground obstructions.
<br />3.Connections to Existing Ducts: Where connections to existing duct lines are indicated, excavate
<br />the lines to the maximum depth necessary. Cut off the lines and remove loose concrete from the
<br />conduits before installing new concrete encased ducts. Provide a reinforced concrete collar,
<br />poured monolithically with the new duct line, to take the shear at the joint of the duct lines.
<br />Remove existing cables which constitute interference with the work.
<br />4.Connection to Existing Handholes and Manholes: For duct line connections to existing
<br />structures, break the structure wall out to the dimensions required and preserve steel in the
<br />structure wall. Cut steel and band out to tie into the reinforcing of the duct line encasement. Chip
<br />out the structure wall to form a key for the duct line encasement.
<br />5.Connections to Existing Concrete Pads: For duct line connections to concrete pads break an
<br />opening in the pad out to the dimensions required and preserve steel in pad. Cut the steel and
<br />bend out to tie into the reinforcing of the duct line encasement. Chip out the opening in the pad
<br />to form a key for the duct line encasement.
<br />6.Removal of Ducts: Where duct lines are removed from existing manholes, close openings and
<br />waterproof manhole. Chip out the wall opening to provide a key for the new section of wall.
<br />7.Precast pullboxes shall be of sizes required.
<br />F.Installation of boxes and fittings:
<br />1.Outlet boxes and Fittings: Install outlet and device boxes and associated covers and fittings of
<br />materials and NEMA types suitable for each locations and in conformance with the following
<br />requirements, except as otherwise indicated:
<br />a.Interior dry locations: NEMA type 1, sheet steel.
<br />1)In dry walls for single and two gang outlets provide 4S and 4D boxes, for 3 or more
<br />outlets use masonry boxes.
<br />2)In block and masonry walls provide masonry boxes of depths required for wall thickness.
<br />3)In poured concrete and plastered walls provide 4S and 4D boxes for single gang outlets
<br />and 2G and 3G-5075 boxes for multiple ganged outlets.
<br />4)In concrete ceilings provide OCR rings. In other ceilings provide 40 and 40D boxes. Omit
<br />covers if standard canopy and device plates entirely cover the ceiling opening.
<br />b.Locations exposed to weather or dampness: Cast metal, NEMA type 3R.
<br />c.Wet locations: NEMA type 4 enclosures.
<br />1)In exposed work, exterior of buildings, in wet location, and flush in non-waterproofed walls
<br />below grade provide FS and FD boxes.
<br />d.Corrosive locations: NEMA type 4X enclosures.
<br />e.Hazardous (Classified) locations: Cast metal, UL 886, NEMA type listed and labeled for the
<br />location and class of hazard indicated.
<br />2.Pull and Junction Boxes: Install pull and junction boxes of materials and NEMA types as follows,
<br />except as otherwise indicated:
<br />a.Interior dry locations: NEMA type 1, sheet steel.
<br />b.Locations exposed to weather or dampness: NEMA type 3R, sheet steel.
<br />c.Wet locations: NEMA type 4 enclosures.
<br />d.Corrosive locations: NEMA type 4X enclosures.
<br />e.Hazardous (Classified) locations: Cast metal, UL 886, NEMA type listed and labeled for the
<br />location and class of hazard indicated.
<br />3.Floor Boxes: In slabs on grade and wet locations: Use NEMA type 4 boxes. At other locations in
<br />slabs, use concrete-tight NEMA 1 boxes.
<br />a.Provide floor boxes with quantity of gangs as required for power, communication or control
<br />as indicated. Use boxes with barriers where required. Provide carpet flanges in carpeted
<br />areas.
<br />4.Hinged Door Enclosures: NEMA type 12, except as indicated.
<br />5.Hinged Door Enclosures Outdoors: NEMA type 3R, with drip hood, factory tailored to individual
<br />units.
<br />6.Hinged Door Enclosures in Corrosive Locations: NEMA type 4X metal enclosure.
<br />7.Cabinets: Flush mounted, NEMA type 1, except as otherwise indicated.
<br />DISCLAIMER
<br />This plan is for illustrative purposes only and shall not be used for construction
<br />or procurement of furniture. Existing conditions and access compliance have
<br />not been field verified; Hendy is not responsible for any conditions that differ
<br />from plan or that are out of compliance as a result. Furniture dealer shall
<br />verify that the final layout of furniture meets clearances required for egress as
<br />required by the authority having jurisdiction.
<br />NORTH
<br />HHENDY.COM
<br />T (949) 851-3080
<br />4770 Campus Dr., Suite 100
<br />Newport Beach, CA 92660
<br />H
<br />ISSUES AND REVISIONS
<br />JOB NUMBER
<br />SCALE
<br />PROJECT
<br />TEAM
<br />All specifications, drawings, concepts, designs, arrangements, intellectual and written material represented herein constitute
<br />unique and unpublished work of H. Hendy Associates and may not be copied, used by or disclosed to others without written
<br />consent of H. Hendy Associates.
<br /> 2023 H.HendyAssociatesc
<br />DATE
<br />salasobrien.com
<br />Project No.:
<br />Irvine
<br />8825 Research Drive
<br />Irvine, CA 92618
<br />949.753.1553
<br />2491-60812-00
<br /> 1/8" = 1'-0"
<br />04463.0000.24
<br />3080 S. HARBOR BLVD.
<br />SANTA ANA, CA 92704
<br />MCGUFF
<br />AB/CD
<br />NO.DESCRIPTION DATE
<br />PLAN CHECK SUBMITTAL 03/17/25
<br />PLAN CHECK RE-SUBMITTAL 06/06/251
<br />ELECTRICAL
<br />SPECIFICATIONS
<br />IE-0.04
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