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Section 9

SECTION 900

UNDERGROUND SERVICE

901 Undergrounding in New Residential Developments/Newly Developed Lots

901.1 If requested in advance by the property owner, new developments will be considered for underground installation of all distribution facilities except main feeders.

901.2 In all areas considered for underground facilities, the developer must agree to:

1) Furnish the DLPUD with a recorded plat of the area for which service is requested. DLPUD will not install underground systems in segments smaller or larger than considered economically feasible.

2) Establish grades along the underground system route which shall be within 4” of finished grade.

3) Clear the established route of all obstructions such as trees, fences, foundations, dirt piles, etc.

4) Refrain from installation of curb, blacktop, sidewalks, etc., that will increase installation cost until after electric lines are installed.

5) Provide property stakes as required by DLPUD.

6) No planned construction after November 1 or before May 1.

7) Provide an easement for installation of DLPUD facilities on private property if it is agreed to be mutually beneficial.

8) A minimum of 200 Amp conductor, raceway and meter socket are required.

901.3 DLPUD will designate a junction point for the connection of the Customer’s secondary underground service lateral. The junction point will be a power pole, service pedestal, pad-mounted transformer or other type of junction enclosure as may be determined by DLPUD. DLPUD will install, own, operate, and maintain all facilities on the source side of the junction point, including the junction enclosure and connections. The customer will install all underground secondary cables, conduit, and other related service equipment on the load side of the junction point. DLPUD will provide maintenance of all residential service cables installed by the customer of 250 amp capacity or less provided the installation meets all DLPUD policies and regulations as well as all federal and state codes. Also see Section 2, subsection 203.2, Underground Service.

901.4 Underground Service – In addition to the equipment on the Customer side of the meter, all conduit and cable required to extend the secondary service lateral from DLPUD’s secondary terminals to the meter are the property of the Customer. After installation by customer, DLPUD will maintain all residential service cable in underground services of 250 amp capacity or less which meet DLPUD policies and specifications.

901.5 All service cable, which shall be built over by hard surfaced drives or roadways, porches, decks or any other building or structure shall be placed in conduit as per DLPUD specifications. Conduit must extend a minimum of 24” from edge of hard surfaced area.

902 Residential Undergrounding in Overhead Areas

Customers residing in residential zones served by overhead lines may install underground electric service. All such services shall be in accordance to subsection 901.3.

903 Underground Service to Commercial and Industrial Customers

903.1 DLPUD encourages underground installation of primary and secondary distribution service laterals to new commercial and industrial structures.

903.2 DLPUD will designate a junction point for the connection of the Customer’s secondary underground service lateral. The junction point for services of less than 800 amps will normally be the secondary terminals of a pad-mounted transformer and for services of 800 amps or more; the junction point will normally be a secondary transition cabinet. Pad-mounted transformers will be placed at a mutually agreed to location, as close as practical to the metering point of the customer or customers. Transition cabinets and conduits or ducts connecting the cabinet to DLPUD’s transformer will be installed, owned and maintained by the customer as per specifications and in such locations as designated by DLPUD. The secondary connections will be furnished by the Customer.

903.3 DLPUD will install, own, operate, and maintain the primary underground cable, and the distribution transformer. The primary cable will be installed from DLPUD’s main distribution system, on or adjacent to the Customer’s property, to the distribution transformer.

903.4 The customer shall furnish and install a transformer pad and/or secondary transition cabinet pad to DLPUD specifications at all locations which are specific to the customers sole use. If the transformer is located in an area where it may be subject to physical damage (e.g. from vehicular traffic), DLPUD may require the Customer to furnish and install an approved means of protection.

903.5 The Customer shall install, own, and maintain all secondary cables and conduits from the transformer or transition cabinet to the building service entrance; the cables and conduit shall be buried 24 inches minimum below final grade. DLPUD must approve the design of all secondary bus duct and cable bus designs. The installation will be inspected by DLPUD and the secondary connections to the transition cabinet will be made by the Customer. It is the Customer’s responsibility to coordinate with and provide the necessary information to DLPUD to assure that adequate connections are made at the secondary terminals of the transformer.

903.6 DLPUD will furnish and install the meter set in accordance with the requirements of Section 600.

904 Transformer Clearances

Where pad-mounted transformers and equipment in pad-mounted enclosures are installed, the minimum clearances specified in Exhibit 7 must be maintained. Fences, shrubbery, and trees may be installed by the Customer provided that the specified clearances are maintained, the grade is not altered, and the underground cables are not endangered.

905 Total Undergrounding

DLPUD does not install underground vaults, manholes, or submersible transformers on customer property. Electric service requiring the total undergrounding of facilities will be arranged for on an individual basis.

906 Underground Wire Trenched to Transformer

Homeowner is responsible for trenching underground cable to within 2 feet of transformer or utility pedestal, leaving an adequate length of wire to terminate in enclosure.

Revised 03/07