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The work covered by this section consists of furnishing and installing conductors of the number and size shown on the plans to provide electrical circuits at locations shown on the plans. The work may include trenching, backfilling, and providing conduit, depending on the type feeder circuit required.
The load current carrying conductors shall be UL Type USE, except that UL Type UF may be used for sizes 8 AWG and smaller. The equipment grounding conductor may be bare or insulated. All conductors shall be copper and in accordance with Article 14002(C)". For feeder circuits size 10 AWG, a cable assembly UL Type UF with the proper number of conductors may be used in lieu of individual conductors. Careful attention shall be given to the required color code. A white conductor in a cable assembly shall not be marked any other color; however, it may be stripped at all accessible points and used as a bare equipment grounding conductor.
Metallic (rigid galvanized steel) and non-metallic (polyvinyl chloride) conduit shall be in accordance with the Article 14002(B) "Conduit" with the appropriate type being used at locations as shown on the plans.
Feeder circuits shall be installed in continuous runs, without splices, except at junction boxes or within light standard bases.
Conductors shall be installed in accordance with the Article 14004(F).
Conduit shall be installed in accordance with the Article 14004(E).
When underground feeder circuits are required, trenches shall be excavated to depths and widths as shown on the plans with essentially vertical walls. The trenches shall be as straight as possible. Underground feeder circuits shall be located a minimum of 6 feet back of the face of curb or outside the limits of the paved shoulder and stone base, as directed by the Engineer. Care shall be used to prevent conflict with existing or future guardrails, sign posts, delineators, and similar devices.
Clean soil shall surround the underground feeder circuit in conduit and all backfill shall be free of rocks and other objectionable materials which might damage the conduit. This will require partial backfilling by hand in areas where it is likely that objectionable materials will be included if mechanical methods of backfilling are used.
The Contractor shall perform all necessary search methods, including but not limited to use of underground metal detection equipment and excavation equipment, to locate existing electrical duct. He shall locate the duct and perform all necessary work including cleaning of the duct for installation of proposed circuits.
When a feeder circuit in conduit passes through electrical duct, the conduit shall be continuous through the duct unless specifically noted otherwise on the plans. After feeder circuits in conduit are extended through duct, it shall be plugged with oakum or duct seal.
When feeder circuits only are required, the load current carrying conductors and grounding conductors shall be installed in either existing conduit or conduit installed under other contract items.
When more than one circuit is installed in a single raceway, a single equipment grounding conductor sized as required for the largest circuit may be used without change in the contract unit bid prices.
Multiple circuits may be placed in the same trench if they are grouped and separated a minimum distance of three inches (3"). When more than one circuit is installed in the same trench there will not be any adjustment of the contract unit bid prices.
1410-4 MEASUREMENT AND PAYMENT.
The quantity of feeder circuits to be paid for will be the actual number of linear feet of each size and type feeder circuit which have been completed and accepted. Measurement will be to the nearest whole foot from electrical terminal to electrical terminal of the longest load current carrying conductor.
The quantity of feeder circuits, measured as provided above, will be paid for at the contract unit price per linear foot for " __________ Feeder Circuit" or "__________ Feeder Circuit in __________ Conduit" of the appropriate size and type. Such price and payment will be full compensation for all work of furnishing and installing all conductors and conduit, including tools, equipment, trenching, and backfilling.
Payment will be made under the following pay items:
__________ Feeder Circuit Linear Foot
__________ Feeder Circuit in __________Conduit Linear Foot