ESBD_510237_1777050134710_02. Specification Item 620.pdf
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- Solicitation number
- 601340000065445
- Issued by
- Upton County, Amarillo City, Texas
About this file
This is a 2024 Specifications document for Item 620 (Electrical Conductors) issued by the State of Texas for roadway and infrastructure projects. The specification details the furnishing and installation of electrical conductors, excluding those covered under other items, with materials required to comply with plans and departmental standards. Conductors must be new, stranded, insulated materials rated for 600V and approved for wet locations, conforming to UL, NEC, and Canadian Standards Association requirements. All materials must be sourced from the Department's Materials Prequalification List (MPL), with contractor notification required when specific materials are selected for each project. Grounding conductors Size 8 AWG and larger must be stranded, except for the grounding electrode conductor at the electrical service, which must be 6-AWG solid conductor. Specific color-coding requirements are mandated: white insulation for grounded conductors, green for insulated grounding conductors, with tape marking allowed for larger sizes at every accessible location.
Construction work must follow plans and NEC standards, with conductors spliced only in designated locations including junction boxes, ground boxes, transformer bases, poles, and structures at handholes. Conductors are subject to insulation resistance testing before final connections, with a minimum requirement of 5 megohms when tested at 1,000V DC, and the Engineer may require verification testing of all or part of the conductor system at the contractor's cost if resistance falls below specifications. Payment is made at the unit price bid per foot of each single conductor as a plans quantity measurement item, with the quoted price providing full compensation for furnishing, installing, testing, and providing breakaway connectors, materials, equipment, and labor. Exceptions to payment include conductors used in electrical services (paid under Item 628), conductors inside roadway illumination assemblies (paid under Item 610), and internal wiring of equipment (subsidiary to pertinent items).
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Text version
2024 Specifications 620
Item 620 Electrical Conductors
1. DESCRIPTION
Furnish and install electrical conductors, except conductors specifically covered by other Items.
2. MATERIALS
Provide new materials that comply with the details shown on the plans and the requirements of this Item. Use stranded insulated conductors that are rated for 600V, approved for wet locations, and marked in conformance with UL, NEC, and Canadian Standards Association (CSA) requirements. Furnish electrical conductors in accordance with DMS-11040, “Electrical Conductors.”
Provide pre-qualified electrical conductors from the Department’s MPL. When required by the Engineer, notify the Department in writing of selected materials from the MPL intended for use on each project.
Ensure all grounding conductors Size 8 AWG and larger are stranded, except for the grounding electrode conductor at the electrical service, which will be a 6-AWG solid conductor.
Use white insulation for grounded (neutral) conductors, except grounded conductors Size 4 AWG and larger may be black with white tape marking at every accessible location. Do not use white insulation or marking for any other conductor except control wiring specifically shown on the plans.
Ensure insulated grounding conductors are green, except insulated grounding conductors Size 4 AWG and larger may be black with green tape marking at every accessible location. Do not use green insulation or marking for any other conductor except control wiring specifically shown on the plans.
3. CONSTRUCTION
Perform work as shown on the plans and in accordance with this Item.
Splice conductors only in junction boxes, ground boxes, and transformer bases, and in poles and structures at the handholes. Splice as shown on the plans. Do not exceed the manufacturer’s recommended pulling tension. Use lubricant as recommended by the manufacturer. Install conductors in accordance with the NEC.
Test insulation resistance on the conductors before making final connections and ensure each continuous run of insulated conductor has a minimum direct-current (DC) resistance of 5 megohms (MΩ) when tested at 1,000V DC. The Engineer may require verification testing of all or part of the conductor system. The Engineer will witness these verification tests. Replace conductors exhibiting an insulation resistance of less than 5 MΩ at no additional cost to the Department.
4. MEASUREMENT
This Item will be measured by the foot of each single conductor.
This is a plans quantity measurement Item. The quantity to be paid is the quantity shown in the proposal, unless modified by Article 9.2., “Plans Quantity Measurement.” Additional measurements or calculations will be made if adjustments of quantities are required.
2024 Specifications 620
5. PAYMENT
The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Electrical Conductors” of the types and sizes specified. This price is full compensation for furnishing, installing, and testing electrical conductors; furnishing and installing breakaway connectors; and materials, equipment, labor, tools, and incidentals, with the following exceptions:
conductors used in connecting the components of electrical services will be paid for under Item 628, “Electrical Services”;
conductors inside roadway illumination assemblies will be paid for under Item 610, “Roadway
Illumination Assemblies”;
conductors inside traffic signal pole assemblies will be paid for under this Item; and conductors used for internal wiring of equipment will not be paid for directly, but will be subsidiary to pertinent Items.
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