(a) Large Three-Phase Service; Nonresidential. This section applies to the installation of three-phase underground service to a point of delivery for other than residential purposes having a demand estimated by the Borough to be in excess of fifty KVA.
Delivery of secondary voltage shall be at the secondary terminals of the transformer, nominally 120/208 volts wye. Other voltages may be available upon special request to the Borough Manager. Delivery of the available primary voltage will be at the metering point designated by the Borough.
(b) Mutual Obligations.
(1) The applicant shall:
A. Provide the Borough with two copies of the plan of the site showing the preferred location of electrical facilities, which plan shall meet all applicable governmental requirements;
B. Grant or cause to be granted to the Borough, without cost to the Borough, all rights of way required for all facilities involved in furnishing service to the applicant;
C. Provide all excavation and backfilling for installation of Borough facilities, including (but not limited to) all sand, fill and concrete as required, and install warning tape provided by the Borough;
D. Provide, install, own and maintain the concrete pad or vault for the Borough's equipment, such as (but not limited to) step-down transformers and switching equipment;
E. When service is at secondary voltage, provide, install, own and maintain all primary and secondary facilities, including cables, conduit, terminators, lightning arrestors and connectors. The step-down transformer shall be furnished by the Borough and installed by the customer.
Current design of pad- mounted transformers limits the secondary cable usage to six cables per phase. Where designs exceed these amounts, it becomes a nonstandard pad design and the Borough shall be consulted to consider the possibility of installing a free-standing trough with buss bars and/or a buss duct terminating in a free-standing trough.
There shall be a minimum length of five feet of cable above the pad.
F. When service is at primary voltage, provide, install, own and maintain all facilities beyond the point of delivery. These facilities include, but are not limited to, primary and secondary cables, step-down transformers, switches, conduit and foundations;
G. At the applicant's own cost, clear the ground in which the lines and related facilities may be installed, keep the route of lines clear of machinery and other obstructions when the line installation crew is scheduled to appear and otherwise cooperate with the crew to avoid unnecessary costs.
H. The customer will be responsible for the installation of Borough-supplied metering transformers. In addition, both the meter base and conduit between the metering transformers and the meter base will be supplied and installed by the customer.
I. Both primary and secondary conduits (if metallic) shall be bonded to the ground and to the tank. When a pit is provided under compartments, conduits should extend into the pit and be bonded to common ground.
(2) The Borough shall:
A. Approve the location of the pad-mounted transformer and inspect all phases of pad installation. A working space of ten feet shall be furnished in front of the terminal compartment.
B. Mark the meter location;
C. Provide specifications for trenching and pad-mount transformer foundations (including, but not limited to, those set forth in subsection (c) hereof).
(c) Trenching Specifications. The purpose of the specifications set forth in this subsection is to promote the highest possible construction quality and efficiency in the installation of an underground electrical system. To accomplish these objectives, it is vital that each party involved understands his or her responsibilities for both the quality of work and the sequence in which each operation is to be done. All locations and requirements for primary service conduit trenches shall be coordinated with the Electric Department before excavation is commenced.
(1) Trench excavation.
A. All trenches shall be excavated to a minimum of thirty inches deep by six inches wide for secondary service cables and forty inches deep by six inches wide for all primary service cables and all street and driveway crossings.
B. A four-inch bed of approved screening or sand shall be laid the entire length of the trench.
(2) Trench backfill.
A. After the Borough has installed the required cable, the applicant shall immediately backfill the trench in accordance with the following specifications:
1. The applicant shall backfill around all cables with approved screening or sand for a minimum of four inches over the top of the cables.
2. The remaining backfill shall be soil-free of rock and other foreign objects and compacted.
3. Any settling or washing out of earth after the initial installation shall be corrected by the applicant.
4. Cables and/or conduits must not be left uncovered in the trench overnight.
5. The Borough will provide warning tape for customer installations twelve inches below the final grade level.
B. All Borough conduits and cables shall be separated by earth for a minimum horizontal distance of twenty-four inches from sewer, water and gas lines. There shall be a minimum vertical separation of twelve inches of earth where Borough cables cross other utilities. The conduits or pipes of sewer, water and gas companies must never be in the same trench with Borough cables. Unless random lay is specified, there shall be a twelve-inch minimum separation, either horizontally or vertically, between Borough cables and telephone or cable television facilities.
(3) Foundation.
A. All foundation pads shall be of concrete and shall be constructed in accordance with Borough specifications which, together with diagrams illustrative thereof, will be given to any applicant by the Electric Department upon the request of such applicant.
B. All primary and secondary conduit bends shall be installed and terminated flush with the top of the transformer pad. Primary conduits will be placed against the left side of the conduit opening and the secondary conduits will be placed against the right of the conduit opening. All metallic conduits shall be terminated with threaded bushings and grounded.
C. All concrete shall meet or exceed the design and test specifications of the American Concrete Institute (ACI), the American National Standards Institute (ANSI and ASA), and the American Society for Testing and Materials (ASTM) where applicable. Line loading shall be for H-20 and/or H20-S16 per American Society of State Highway Officials (ASSHO) specifications.
D. When the pad is located in areas exposed to vehicular traffic, a barrier shall be provided to protect the transformer. Such barriers shall consist of a concrete-filled four-inch steel post with three feet below grade and a minimum of four feet above grade or approved protection of equal strength. Barriers shall be spaced at a minimum of three-foot intervals.
E. A twelve-inch moat area, designed to contain the oil in case of a transformer leak, shall surround the pad and be filled with crushed stone.
F. The transformer pad shall be located as far as practical from windows, doors, fire escapes, entrances and ventilating ducts so as not to present physical obstructions. It shall be the applicant's responsibility to secure the approval of an approved electrical inspection agency and to comply with any insurance regulations affecting the installation.
(Ord. 2211. Passed 4-29-97.)