8-156 Section 818. Electrical
818.01 Description
This work consists of providing operating electrical units; removing, salvaging, or disposing of existing electrical components; excavating, backfilling , and restoring the site in accordance with section 816; and disposing of waste excavated materials . Com plete this work in accordance with this section, sections 819 and 820, and the contract . For items not specified in section 819 or 820 or the contract , complete the work in accordance with the requirements of the NEC, the NESC , MIOSHA, and the Michigan Dep artment of Licensing and Regulatory Affairs (MDLARA ). Provide personnel who are qualified and experienced in perform ing the required work . Provide a licensed journeyman electrician supervisor on-site during installation and electrical construction.
818.02 Materials
Provide material in accordance with the following sections : Granular Material Class II ..................................................................... 902 Coarse Aggregate 17A .......................................................................... 902 Conduit ................................................................................................. 918 Electrical Grounding System ................................................................. 918 Electrical Wire and Cable ...................................................................... 918 Direct Burial Cable ................................................................................ 918 Equipment Grounding Conductor .......................................................... 918 Handholes ............................................................................................. 918 Wood Poles ........................................................................................... 918 Concrete, Grade 3500 ........................................................................ 1004
A.Conduit
1.Direct Burial Application . Provide a smooth surface conduit of one of the following types for direct burial applications:
a.Galvanized steel conduit;
b.Smooth-wall, Schedule 80 rigid (PVC);
c.Smooth-wall, coilable, Schedule 80 ( polyethylene [ PE]); or
d.Rigid fiberglass.
2.Provide Schedule 80 conduit for traffic signal , ITS, and freeway lighting work.
3.Jacking and Boring Application . Provide Schedule 80 PVC or Schedule 80 PE conduit for jacking and boring operations. MDOT Standard Specifications for Construction Section 818 8-157 4. Directional Boring Application . Provide Schedule 80 coilable PE conduit for directional boring.
5.Encased Conduit Application . Provide Schedule 80 conduit for encased conduit and provide Grade 3500 conc rete made with 17A coarse aggregate in accordance with section 1004.
6.Conduit on Structure Application . Provide Schedule 80 PVC or rigid fiberglass conduit on structures.
B.Conductors . Provide the number of stranded copper conductors for overhead and underground conductors shown on the plans.
C.Bracket Arm, Clamp On . This work consists of completing one or more of the following work types at locations shown on the plans:
1.Furnishing and installing a 6-, 9 -, 12-, 15-, or 18-foot clamp on bracket arm.
2.Removing and disposing of an existing 6-, 9 -, 12-, 15-, or 18 -foot clamp on bracket arm. As applicable, this work includes removal or installation of clamp-on bracket arm of the size specified on the plans and any associated materials required to ensure a complete removal or installation, as specified for a location. Fabricate the bracket arm truss tubes from 2⅜ -inch OD by 0.120- inch-thick steel tubing meeting the requirements of ASTM A500/A500M for Grade B steel and subsection 105.10. Weld to a ⅜-inch-thick steel mounting plate meeting the requirements of ASTM A36/A36M . Weld ½- by 2-inch flat bar meeting the requirements of ASTM A36 /A36M between bracket arm tubes to form the truss . Weld ¼-inch flat bar steel gussets between arm tubes and mounting plate. Complete welding in accordance with AWS D1.1 and the contract. Hot dip galvanize the bracket arm, all brackets , and hardware after fabric ation and welding according to ASTM A123 /A123M and ASTM A153/A153M where applicable.
D.Steel Pole Mount. Use U -bolts meeting the size requirements below to attach bracket arms to steel poles . Use hex nuts, flat washers , and lock washers to secure U -bolts . U-bolts and hardware must meet the requirements of ASTM A36 /A36M steel. Use ⅝-inch rod U -bolts for pole diameters equal to or greater than 8½ inches but less 9⅛ inches. Use ¾-inch rod U -bolts for pole diameters equal to or greater than 9⅛ inches and equal to or less than 10¼ inches. MDOT Standard Specifications for Construction Section 818 8-158 E. Wood Pole Mount . Fabricate the pole-mounting plate from ⅜ -inch-thick steel plate meeting the requirements of ASTM A36 /A36M and weld gussets to the arm tubes . There must be one plate per arm tube. Each plate must incorporate two 0.562-inch-diameter holes and one 0.687- by 1.50-inch keyhole for lagging to the wood poles.
818.03 Construction
Contact the MDLARA for electrical service inspection prior to energizing services.
A.Conduit . Build straight conduit runs . If the contract requires sweeps, use the largest radius that will fit the work space available for each sweep. Do not install more than 360 degrees of bends per conduit run between junction boxes per NEC. Provide conduit fittings and use methods of joining conduits, including conduit cement, in accordance with current NEC methods . If the NEC does not clearly describe the method, install the conduits in accordance with the manufacturer's recommendation. Obtain the Engineer’s approval of installation methods before beginning work. Attach end bells on the ends of conduits entering handholes to prevent damage to the cable. Install continuous coilable conduit between handholes. For conduit not terminating in structures such as manholes, handholes, or foundations, extend the c onduit 2 feet beyond pavement limit unless otherwise required. Plug unoccupied conduit. Verify that new conduit inserted into existing manholes or handholes does not interfere with racking, training of cables, or both. Do not disturb existing cables.
1.Bends . Bend conduit to the radii specified in the current NEC . For conduit entering foundations or cable pole envelopes, provide conduit with factory bends.
2.Excavation . Excavate the conduit trench to provide an earth cover of at least 30 inches over the finished conduit.
3.Drainage. Grade the trench to provide drainage to handholes.
4.Grades. Stake conduit grades at no greater than 50-foot intervals or as directed by the Engineer . Create a grade that slopes at least 4 inches over 100 feet to the lowest manhol e or handhole or from the middle of the conduit run toward both holes. MDOT Standard Specifications for Construction Section 818 8-159 5. Backfill . Tamp the bottom of the trench to produce a smooth, flat , or gentl y sloping surface before placing the conduit . Backfill trenches outside the roadbed with excavated material, s uitable for backfill, as determined by the Engineer . If excavated material is unsuitable, backfill the trenches with Class II granular material in accordance with section 204. Backfill trenches within the limits of the roadbed with Class II granular materi al in accordance with section 204.
6.Supports . Provide support for conduit running through holes built over or into existing duct . If ducts are built into an existing handhole, build a 4-inch tapered pocket into the wall . Build new service ducts into existing handholes without interfering with cable racking. Install required inserts.
7.Clearances. Do not allow conduit or concrete encasement to contact obstructions . Provide a vertical clearance of 9 inches, except provide at least 12 inches of clearance f or conduit running parallel to water lines, gas mains, and other underground structures not part of the electrical system. The Engineer and the owner of the obstruction will determine the method of protection if the Contractor cannot provide the required 12-inch clearance. Exposed Conduit . For high voltage lines , minimum clearance must follow MIOSHA, NESC, and utility standards.
8.Clearing . After installing conduit runs, pull a mandrel 12 inches long, or shorter for conduit runs with bends, and with a diameter ½ inch smaller than the conduit . Attach a swab or cleaning device designed to clear the conduit to the mandrel . Notify the Engineer before performing clearing work.
9.Encased Conduit . Encase conduit runs in Grade 3500 concrete. Space adjacent conduits at least 1 inch apart and fill the space with concrete. Provide a conduit encasement with at least 3 inches of concrete around the conduit . If steel reinforcement is required, separate the reinforcing bars from the conduits with 2 inches of concrete. Provide at least 3 inches of concrete cover between the reinforcing bars and the surface of the encasement . Stagger conduit joints vertically. Use concrete, plastic, or bituminized fiber as separators, spacers, blocks, or suppor ts that will remain in the finished concrete encasement . If installing 20-foot lengths of conduit, place spacers no MDOT Standard Specifications for Construction Section 818 8-160 greater than 7 feet apart . If installing 10-foot lengths of conduit, place spacers no greater than 5 feet apart. Prevent the conduit bank fr om floating after concrete placement by anchoring the bank to stakes at intervals no greater than 10 feet apart in firm soil and no greater than 5 feet apart in loose soil. Verify that the concrete fully encases the conduit.
a.Tier by Tier Method . Grade the trench and place a foundation of concrete at least 3 inches thick in the bottom of the trench. If steel reinforcement is required, place the concrete at least 5 inches thick with reinforcing bars in place. Lay the bottom tier of conduits, separated by spacers . Fill the space between conduits with concrete and cover the conduits to the height of the next conduit tier. Construct succeeding tiers as specified for the first tier . Provide continuous placement of successive tiers of conduit with interruptions no greater than 45 minutes.
b.Build-Up or Monolithic Methods . Grade the trench and place masonry supports at intervals of 3 to 5 feet or a foundation of concrete at least 3 inches thick in the bottom of the trench. If steel reinforcement is required, place the concrete at least 5 inches thick with the reinforcing bars in place. Place the conduit using plastic or concrete separators to erect a rigid, self -supporting structure of conduit . Place the concrete to fill the spaces between the conduits completely, w ithout damaging or displacing them. Notify the Engineer prior to encasing the conduit in concrete . Place a coupling on the ends of conduit and install a removable plug. Sheet and brace the trenches as required. Support pipes or other structures exposed in the trenches as required to prevent damage.
10.Directional Bore . Bore by augering or jacking a steerable rod and pulling back a cone reamer that expands the soil that cuts a hole to the required diameter . Use a reamer with a diameter no greater than 2 inches larger than the conduit, as shown on the plans. The Contractor may use a drilling fluid of water and bentonite in directional drilling. The Contractor may use a polymer for lubrication in the drilling fluid. Place directional bore or drill equipment and supplies so they do not interfere with traffic or with the use of adjacent property . Locate equipment and supplies a minimum distance from the edge of pavement as directed by the Engineer . Place access pits in the MDOT Standard Specifications for Construction Section 818 8-161 location of handholes at the boring termination points, as shown on the plans or directed by the Engineer.
11.Jacking and Boring
a.Compaction Auger (packer, expander) . Auger a rotating stem under the roadway and then pull back a series of graduated cones that displace the soil to obtain the required diameter.
b.Hydraulic Push Rods or Stem (pipe puller, packer) . Push rods or stems under the roadway with a hydraulic ram and pull a series of graduated cones that displace the soil to obtain the required diameter.
c.Other Methods . The Engineer may approve other jacking and boring methods before construction. Do not jet or use water or air ahead of the casing. The Contractor may use air rams longitudinally in the right -of-way but under roadways only if approved by the Engineer. Before jacking and boring, excavate a starter alignment trench to the elevation of the proposed conduit . Excavate a length of level trench at least 15 feet long for trenches up to 4 feet deep, and increase the trench length 5 feet for each additi onal 1 foot of depth. Use guide rails, sills, or other positive alignment devices to start the crossing . Restrain drive rods against horizontal and vertical movement. If using heads to develop an opening with a diameter greater than 2 inches, develop openings by increasing the head size in 1 inch increments. If the highway is super -elevated, start the bore from the lower side of the pavement. The Engineer will determine whether conditions warrant the use of sheeting and bracing. Use sheeting an d bracing for boring as directed by the Engineer if access pits are located within the 1:1 slope from the edge of paved surfaces or back of curbs. Place access pits in the location of handholes at the boring termination points, as shown on the plans or dir ected by the Engineer. Provide the bore and jack record sheet or log if requested by the Engineer. MDOT Standard Specifications for Construction Section 818 8-162 Control groundwater entering the excavation from seepage layers and lenses or pockets of saturated material from inside the excavation using drainage, bailing, pumping, or other methods . Do not remove or disturb adjacent soil while draining the groundwater. If ordinary methods of drainage prove unsatisfactory, as determined by the Engineer, drain excavations as required.
12.Record Drawings . Within 5 days after completing conduit work or installing working cables, provide a record drawing to the Engineer . Show deviations from the original plans . Measure the lengths from the inside walls of the handholes and the center of post foundations and cable poles.
B.Electrical Wire and Cable Permanently tag wires and cables in manholes, handholes, and cabinets at the points of entrance, exit, splicing, and termination. Label new and affected wires and cables to indicate the source and use of each where above gra de. Tag wires and cables in manholes and handholes with a stamped brass tag. Provide wires and cables with an additional length of at least 10 feet in each manhole and handhole. Seal cable ends where the plans show coiling of cable. Cut and remove cables w ithin handholes and manholes for abandoned underground cables as shown on the plans. Permanently label detector wiring harnesses at the cabinet terminal strip with the source and use. Do not install service entrance conductors in handholes or vaults contai ning other wires or cables. Do not splice signal cables or interconnect cables for traffic signals unless indicated in the plans.
C.Direct Burial Conductors . Provide and install direct burial single conductor s.
1.Approval . Unless otherwise specified in the contract, the Department is the agency responsible for maintaining direct burial conductor facilities . Provide certified test reports to the maintaining agency upon request.
2.Installation . Install direct burial conductors as shown on the plans and in accordance with the manufacturer ’s recommendations . Do not drag conductors on the ground. Do not splice conductors MDOT Standard Specifications for Construction Section 818 8-163 underground. Install conductors in continuous runs between manholes, handholes, or foundations.
3.Location . Install direct burial conductors parallel to the edge of pavement, along the shoulder edge, clear of guardrail locations . Place conductors in a straight line between visible reference points such as handholes or light standards.
4.Excavation . After compacting the subbase in the shoulder area to at least the elevation of the top of the base course, cut a trench along the shoulder edge for placement of the conductors . Remove rocks or other sharp objects from the trench. Lay the conductors in the trench. Install marking tape from 6 to 18 inches above underground conduit or cable. Do not install marking tape above jacked and bored conduit . The Department will provide the marking tape. Provi de 3 feet of cover over direct burial cable installed outside the shoulder.
5.Conductors Installed In Conduit . If installing direct burial conductors in conduit, use clean conduit, free of rough spots. Avoid damage to insulation and conductor jackets during installation. When required, use lubricating compounds approved by the conductor manufacturer . Use non-injurious lubricants listed by nationally recognized testing laboratories on conduits, conductors , insulations, or jackets. Provide slack in each run of cable. Group multiple conductors trained through a box, manhole, or handhole, by circuit . Bundle them using cable ties, and support them to reduce pressure or strain on conductor insulation. Bend wire and cable in accordance with the manufacturer ’s recommended bending radius during installation and in permanent placement. Use a cable-pulling apparatus with no sharp edges or protrusions.
6.Testing . Test direct burial conductors for continuity, shorts, and grounds after installation and backfill . Replace conductors that fail field tests with new conductors at no additional cost to the Department.
D.Equipment Grounding and Bonding . Provide and install grounding electrode conductors to provide a continuous grounding electrode system . Install grounding electrode conductors and connect to light standard bases, strain poles, pedestal bases, span wires, concrete-encased MDOT Standard Specifications for Construction Section 818 8-164 electrodes, ground rods , and service disconnects . For traffic signals, all equipment listed above that is associated with a single cabinet must be bonded to a continuous connection from grounding electrode system . Do not use e quipment grounding conductors to provide continuity of the grounding electrode system . Install equipment grounding conductors in the same raceway or trench as the current -carrying conductors and connect to the ground bus at the electrical source and to the grounding termination at the utilization equipment. If installing conductors directly in earth with no conduit protection, the Contractor may use a bare conductor . Install the conductor at the same depth as a conductor installed in conduit. If installing the conductors in conduit, use an insulated conductor, color -coded green in accordance with subsection 918.04.A . Do not damage the conductor during installation.
E.Handholes . Provide and install, remove, salvage, reconstruct, abandon, or adjust handholes, including covers and fittings as shown on the plans. If the plans show existing cables maintained in new handholes, break and remove conduit and concrete encasements to the walls of the new handhole. Extend existing cables, train, rack, and support on the walls of the handhole.
1.Remove or Abandon . Remove handholes completely or abandon in accordance with secti on 204.
2.Adjust . Adjust handholes in accordance with section 403.
3.Reconstruct . Reconstruct handholes in accordance with section 403. Use existing frames and covers unless otherwise directed by the Engineer.
4.Installation . Ensure that handholes are flush with the pavement surface and 1 inch above grade outside paved areas . Install the frame and cover flush with the top of the handhole. Use CIP or precast reinforced concrete handholes. Make the inner surface of reinforced handholes smooth. Sandblast castings . Cast handholes free of pouring faults, blow holes, cracks, and other imperfections . Cast handholes that are sound, true to form and thickness, clean, and finished. Provide and install cable racks and hooks. Plug unused conduit entrances and conduit openings for future use by others with removable plastic plugs or other plugs approved by the Engineer. MDOT Standard Specifications for Construction Section 818 8-165 Remove rubbish, construction debris, and water from handholes . Grout conduits from outside the handholes to inside the handholes.
5.Excavation . Excavate to the di ameter and depth for installing handholes at locations shown on the plans.
6.Drainage. Cast drain holes at the bottom of the handhole. Provide drainage of handholes installed over underground conduits and on bridge decks.
7.Backfill . Install the handhole on Cl ass II g ranular material . The Engineer will determine whether excavated material meets the backfill requirement . Use Class II granular material if the Engineer determines that excavated material does not meet the backfill requirement.
F.Electrical Service Requirements
1.Unmetered Service. Provide NEMA type 4X service disconnecting means with stainless steel enclosures, unless otherwise required. The Department will provide means for padlocking the operating handles in the open or closed position. If directed by the Engineer, run conduit on the outside of the pole. Support the conduit using two- hole galvanized support brackets, spaced no greater than 3 feet apart . Bond the conduits and equipment as required by the NEC, utility company, and the contract . Use waterproof metal elbows with removable covers to enter and exit service disconnects and controllers.
2.Metered Service. Provide NEMA type 4X service disconnecting means with stainless steel enclosures, unless otherwise required. The Department will provide means for padlocking the operating handles in the open or closed position. On wood poles, connect the meter socket to the service disconnect using at least 1½ -inch-diameter Schedule 80 PVC or galvanized metal conduit . On steel po les, connect the wi ring between the meter socket and the service disconnect on the inside of the pole. If directed by the Engineer, run conduit on the outside of the pole. Support the conduit using two-hole galvanized support brackets, spaced no greater than 3 feet apart . Bond the conduits and equipment as required by the NEC, utility company, and the contract . Use waterproof metal elbows with removable covers to enter and exit meters, service disconnects, and controllers.
3.Electrical Service Removals. Contact the local power company shown on the plans to coordinate removal of metered service and power feed. Perform removal work in accordance with the NEC, the contract, and the local power company standards. MDOT Standard Specifications for Construction Section 818 8-166 G. Wood Pole . Provide and install, relocate, or remove wood poles and associated hardware for supporting span wire and bracket -arm-mounted traffic signals, and guying the pole per span. Tamp the earth replaced around new or relocated poles . Fill, tamp, and level holes after removing poles . Use hot dip galvanized turnbuckles, tension tie bars, and associated steel hardware in accordance with ASTM A153/A153M . Set wood poles to the minimum depths specified in Table 81 8-1: Table 818- 1: Wood Pole Lengths and Depths Pole Lengt h Depth 35-foot Class 4 pole 6 feet 40-foot Class 4 pole 6 feet 45-foot Class 4 pole 6½ feet 50-foot Class 4 pole 7 feet 55-foot Class 4 pole 7½ feet 60-foot Class 4 pole 8 feet
818.04 Measurement and Payment
Pay applicable fees for electrical service inspection per MDLARA. Pay Item Pay Unit Conduit, Rem ............................................................................................. Foot Conduit, Encased, (number), __ inch ........................................................ Foot Conduit, Directional Bore, (number), __ inch ............................................. Foot Conduit, DB, (numb er), __ inch ................................................................. Foot Conduit, (type), __ inch, Structure ............................................................. Foot Conduit, (type), __ inch .............................................................................. Foot Conduit, Schedule (number), __ inch ........................................................ Foot Conduit, Jacked Bored, (number), __ inch ................................................ Foot DB Cable, 600V, 1/C# (size) ...................................................................... Foot DB Cable, in Conduit, 600V, 1/C# (size) .................................................... Foot DB Cable, in Conduit, Rem ........................................................................ Foot Cable, Rem ................................................................................................ Foot Cable, (type), Rem ..................................................................................... Foot Cable Pole, (type), Disman ....................................................................... Each Cable, P.J., 600V, 1, (size) ......................................................................... Foot Cable, Sec, (volt), (number), (size) ............................................................ Foot Cable, Sec, (type), (number), (size) ........................................................... Foot Cable, Shielded, (volt), (number), (size), (type) ......................................... Foot Cable, St Ltg, (volt), (number), (size), (type) .............................................. Foot MDOT Standard Specifications for Construction Section 818 8-167 Cable, Equipment Grounding Wire, 1/C# (size) ......................................... Foot Bracket Arm, Clamp On, _Foot, with _ Foot Rise ..................................... Each Bracket Arm, Clamp On, Rem .................................................................. Each Hh, (type) .................................................................................................. Each Hh, (type), (size) ....................................................................................... Each Hh, (work) ................................................................................................. Each Metered Ser v ............................................................................................ Each Metered Serv, Rem ................................................................................... Each Unmetered Serv ........................................................................................ Each Unm etered Serv, Rem .............................................................................. Each Wood Pole ................................................................................................ Each Wood Pole, Cl __, __ foot ......................................................................... Each Wood Pole, Rem ...................................................................................... Each Serv Disconnect ........................................................................................ Each Serv Disconnect, Rem .............................................................................. Each Serv Disconnect, Salv ............................................................................... Each Wood Pole, Fit Up, (type) ......................................................................... Each Conc Pole, Fit Up, (type) .......................................................................... Each Steel Pole, Fit Up, (type) ........................................................................... Each Unless otherwise required, the unit prices for the pay items listed in this subsection include the cost of excavation, granular material, backfill , and disposal of waste excavated material . Restoring the site in kind in accordance with section 816 will be paid for separately.
A.Conduit . The Engineer will measure conduit in place, from the inside walls of manholes, and the centers of handholes, post foundations, and cable poles. The unit prices for Conduit, Rem include the cost of removing the type, number, and size of conduit shown on the plans. The unit prices for Conduit, (type), __ inch and Conduit, DB, (number), __ inch include the cost of installing the type, number, and size of conduit shown on the plans, and installing marking tape. The unit price for Conduit, (type), __ inch, Structure includes the cost of providing and installing the conduit components, hardware, and other appurtenances required. The unit price for Conduit, Jacked Bored, (number), __ inch includes the cost of installing rigid metal, or Schedule 80 PVC conduit. The unit price for Conduit, Directional Bore, (number), __ inch includes the cost of instal ling Schedule 80 PE conduit. The unit price for Conduit, Encased, (number), __ inch includes the cost of the following: MDOT Standard Specifications for Construction Section 818 8-168 1. Installing conduits ;
2.Installing sheeting and bracing;
3.Removing boring pits ; and
4.Filling voids. The unit price for Conduit, Schedule (num ber), __ inch includes the cost of installing conduit approved for direct burial applications, as specified in subsection 81 8.02.A.1, and installing marking tape.
B.Direct Burial Cable . The Engineer will measure cables in place for the total length of the required conductors, single, multiple, or both. The Engineer will measure direct burial cable, at grade, between centers of handholes, light standards, and poles. The Engineer will not measure the following cable portions:
1.Looping;
2.Sag;
3.Trainers ;
4.Splicing;
5.Racking ;
6.Slack length; or
7.Length inside equipment. The Engineer will measure the vertical length of cable from 2½ feet below grade to the pot head or service head at cable poles. The unit prices for the relevant direct bury cable pay items include the cost of marking tape, bonding, tagging, and making splices, terminations, and connections. The unit price for DB Cable, in Conduit, 600 Volt, 1/C# (size) includes the cost of pulling the cable in the conduit. The unit price for DB Cable, in Conduit, Rem includes the cost of removing all cables from the existing conduit measured per lineal foot of conduit.
C.Cable, Removal . The unit prices for Cable, Rem and Cable, (type), Rem include the cost of dead ending, circuit cutting, work required to leave circuits operable, and disposing of the removed cables, wire, hardware, and other appurtenances. MDOT Standard Specifications for Construction Section 818 8-169 The unit prices for other items of work include the cost of abandoning cables and conduit.
D.Cable, Pole Dismantle. The unit price for Cable, Pole, (type), Disman includes the cost of dismantling and off -site disposal of the following:
1.Riser pipe;
2.Cross arms;
3.Lightning arrestors ;
4.Pot heads ;
5.Cutouts ;
6.Molding;
7.Weather cap;
8.Concrete encased bend; and
9.Other related materials.
E.Cable, P.J.; Cab le, Section; Cable, Shielded, and Cable, Street Lighting . The Engineer will measure Cable, P.J., Cable, Sec, Cable Shielded , and Cable, St Ltg , of the type required, including the number and size of conductors, in place from centers of manholes or handholes and between wood poles, and will add 10 feet of cable for every handhole. The unit prices for Cable, P.J., Cable, Sec, Cable Shielded , and Cable, St Ltg , of the type required, include the cost of the following:
1.Racking in manholes and handholes;
2.Bonding and tagging cables in manhole and handhole identifications;
3.Making splices and connections;
4.Cutting cable and re-splicing for service to traffic signals; and
5.Providing and installing the cable components, hardware, and other appurtenances required.
F.Cable, Equipment Grounding Wire . The Engineer will measure Cable, Equipment Grounding Wire, 1/C# (size) in a straight line between changes in direction and to the centers of light standards and the control cabinet . The Engineer will measure only one equipment grounding conductor if more than one circuit conductor run is installed in conduit. MDOT Standard Specifications for Construction Section 818 8-170 The unit price for Cable, Equipment Grounding Wire, 1/C# (size) includes the cost of the following:
1.Installing grounding conductor in conduit ;
2.Vertical conductors and required slack ;
3.Bonding;
4.Tagging; and
5.Making splices and connections. For traffic signals, the Department considers equipment grounding incidental to electrical work and will not pay for it separately.
G.Electrical Service, Removal . The unit price for Elec Serv, Rem includes the cost of returning the meter to the local utility company and disposing of the removed concrete-encased conduit, cables, hardware, and other appurtenances.
H.Handholes (Hh) . The unit prices for handhole pay items include the cost of removing concrete encasement and conduit where new manholes or handholes access an existing conduit run as indicated on the plans and installing cable racks and hooks. The Department differentiates between Hh, (type) and Hh, (type), (size) based on the size and type of material to construct the handhole. The unit prices for Hh, (type) and Hh, (type), (size) include the cost of the frame and cover, ground rods, and treated wood foundations. The Department will differentiate Hh, (work) pay items by the activities required to complete the work . The following pay items are Hh, (work) pay items:
1.Handhole Adjust . The unit price for Hh, Adj includes the cost of using existing frames and covers.
2.Handhole Abandon . The Engineer will measure Hh, Abandon by planned quantities . The unit price for Hh, Abandon includes the cost of removing the frame and cover and breaking down the wall structure. The unit price for Hh, Access includes the cost of installing the following:
a.Access handhole openings and covers in exis ting steel poles ;
b.Additional hardware;
c.Reinforcing frames ; MDOT Standard Specifications for Construction Section 818 8-171 d. Stainless steel screws; and
e.Other material required to complete the work.
3.Handhole Reconstruct, Remove, and Salvage. The unit price for Hh, Reconst includes the cost of using existing frames and covers. The unit price for Hh, Rem includes the cost of removing the handhole. The unit price for Hh, Salvage includes the cost of installing salvaged handholes.
I.Service Disconnect . The unit prices for instal ling, salvaging as required, and removing the relevant service disconnect pay items include the cost of the service disconnect (salvaged as required), fuses, brackets, hardware, cable, conduit, grounding (wire and ground rods), and other material required to complete the work. The unit price for Serv Disconnect, Rem includes the cost of removing the disconnect, connectors, wir ing, grounding, and ground rods and any other material required to complete the work. The unit price for Serv Disconnect, Salv includ es the cost of installing the salvaged service disconnect , including all other material required to complete the work.
J.Metered Service. The unit prices for installing the relevant Metered Serv include the cost of material required by the local utility company and the NEC and providing and installing the meter, meter sockets, brackets, hardware, equipment supporting structure, cable, conduit , grounding, and other material required to complete the work . The unit price for Metered Serv includes the cost of ret urning the meter to the local utility company, storage, or disposal of removed material and all other material required to complete the work. The unit price for Metered Serv, Rem includes the cost of removing the meter and meter socket and all other materi al required to complete the work.
K.Unmetered Service. The unit prices for Unmetered Serv and Unmetered Serv, Rem include the cost of material and labor required to instal l and remov e, in accordance with NEC, the relevant unmetered service items. Providing and installing all brackets, hardware, equipment supporting structure, cable and/or wire, conduit, conduit fittings, and grounding are also considered included in the unit price. The lump sum pay item, Power Co. (Est. Cost to Contractor), includes the cost of reimbursing the Contractor for payments made to the power MDOT Standard Specifications for Construction Section 818 8-172 company for providing electrical power at the locations shown on the plans . The Department will estimate the reimbursement costs to the Contractor and establish a lump sum price as show n on the plans . The Engineer will measure and the Department will pay the Contractor for power company invoices paid, as submitted to the Engineer. The Contractor is responsible for scheduling and coordinating installation and payment with the Engineer. The unit prices for the relevant pay items include the cost of installing and other appurtenances required.
L.Wood Pole . The unit price for Wood Pole includes the cost of providing and installing pole markers, additional support, components, hardware, and other required appurtenances and transferring wires from old to new poles. The unit price for Wood Pole, Cl __, __ foot includes the cost of guying wood poles of the required class. The Engineer will measure Wood Pole, Rem based on plan quantities in accordance with subsection 109.01. The unit price for Wood Pole, Rem includes the cost of removing and storing, if required, poles, concrete, pole bases , and hardware. The unit price for Wood Pole, Fit Up includes the cost of arranging wire on poles and providing and installing the components, wires, hardware, and other required appurtenances.
M.Concrete Pole, Fit Up . The unit price for Concrete Pole, Fit Up includes the cost of providing and installing the conduit , hardware, and other appurtenances required.
N.Steel Pole, Fit Up. The unit price for Steel Pole, Fit Up includes the cost of providing and installing the conduit, hardware, and other required appurt enances.
O.Bracket Arm. The unit price for Bracket Arm, Clamp On, _Foot, with _ Foot Rise includes all labor, equipment, and materials required to install a clamp -on bracket arm of the type specified including, hardware, fittings, connectors, ground wire, gr ounding, and other such material required to provide a complete bracket arm installation. Bracket Arm, Clamp On, Rem includes all labor and equipment required to remove the bracket, hardware, and appurtenant items as required for a complete removal . Bracket Arm, Clamp On, Rem includes storage and disposal of removed materials.
Source: Michigan Standard Specifications for Construction, 2020 Edition. Pages 717–733 of 1,146.