2024-01-01_R2 - CO_PKSI - BCWC_CORE Electric Builder Developer Service Requirements.pdf

Builder/Developer

Service

Requirements

Revised January 2024

We understand that obtaining electrical facilities is only one of many tasks our members must achieve during the construction of a new residence or commercial facility. Therefore, it is our goal to provide the best member service possible.

Please do not hesitate to contact our Engineering Services

Department with any questions or concerns at 303-688-3100, option 4.

Providing us with the work order (WO#) number or description of the property will help us answer your questions promptly.

We look forward to serving you!

Table of Contents

PROCESSING NEW SERVICE APPLICATIONS

Phase 1 – Engineering

Phase 2 – Contract and Construction

ELECTRIC SAFETY AND CODE CLEARANCES

LOCATES FOR UNDERGROUND UTILITIES

RIGHT-OF-WAY, EASEMENTS, AND ACCESS

Types of Easements

Access to Utility Easements

General Restrictions on Easements/Right-of-Way

Landscaping on Utility Easements (Working Space)

Single-phase Pad Mounted Equipment

Three-phase Pad Mounted Equipment

Pad Mounted Switchgear

EUSERC Cabinets

Guard Posts for Pad Mounted Equipment

TEMPORARY POWER SERVICES

Temporary Overhead Power Source

Temporary Underground Power Source

Temporary CT Metering

RESIDENTIAL POWER SERVICES (Single Lot, Multi-Family and Development)

Street Lighting

Joint Trench

Meter Sets

Choosing the Right Service Voltage

Meter Locations

Service Laterals (installed by CORE)

Multiple Meter Installations

Specifications for Single-Phase 120/240V 3-Wire Meter Housings

Additional Requirements for 1Ø Underground Feed Residential Meter Housings

Additional Requirements for 120/208V 1Ø Hookups

Fault Current Levels and Standard KVA Size Transformers

COMMERCIAL/INDUSTRIAL POWER SERVICES

Street Lighting

Joint Trench

Meter Sets

Meter Locations

Multiple Meter Installations

Cable Limits for Three-Phase Pad-Mounted Transformers

Cable Limits for Single-Phase Pad-Mounted Transformers

Fault Current Levels and Standard KVA Size Transformers

Specifications for Single & Three-Phase Self-Contained Meter Housings (120/240V 1Ø, 3-Wire; 120/208V, 3Ø, and 277/480V 3Ø 4-Wire)

Specifications for Meter Location and Installation

Three-Phase Services: 120/240V, Four-Wire Delta

Three-Phase Self- Contained Services: 277/480V

Three-Phase Services, Above 200 Amps

Manufacturer Drawings Required for Services Over 200 Amps

CURRENT TRANSFORMER (CT) / POTENTIAL TRANSFORMER (PT) METERING

GLOSSARY

DRAWING LIST

SMALL GENERATION INTERCONNECTION – www.CORE.coop/my-cooperative/renewables http://www.core.coop/my-cooperative/renewables http://www.core.coop/my-cooperative/renewables

PROCESSING NEW SERVICE APPLICATIONS

There are two separate phases in the processing of each new service application.

Each of the two phases requires that the applicant complete certain steps. This may involve supplying information about the requirements for electric service to

CORE or completing certain actions at the construction site. In all cases, a delay in providing information needed for engineering or construction will delay the availability of electric service. Therefore, it is important that information is provided as needed, and all steps are completed as quickly as possible. This guideline is provided to assist the applicant with this process. Some requests may have unusual aspects not specifically described here. Additionally, please make sure to contact the Engineering Services Team for any service upgrades.

Phase 1 – Engineering

Initial contact with CORE will open a work order, which identifies the owner as an applicant for new service. The information required in STEP 1 may be provided by phone, email, or in person at our office. A Contract

Authorization form will be submitted to the applicant requesting the items listed within STEP 1. Upon receipt of the completed and signed Contract

Authorization with proof of ownership and payment of the design fee, the work order will be released to engineering for assignment.

STEP 1

o Owner name to appear on all accounts o Owner’s current mailing address o Street address of property, if available o Legal description of property to which service is required o Owner/builder telephone numbers, email, etc.

o Amperage required o Payment of applicable design fee o Proof of ownership (Warranty Deed, Property Tax Statement, etc.)

o Any distributed generation (solar, wind, etc.) interconnection requirements.

For commercial, industrial, and large residential services:

o Copy of engineered electric one-line diagram and panel schedules o Copy of site plan, drainage, grading and utility site plan – PDF and

CADD format o Total electric demand (kW) o Largest motor(s) and type of motor starting to be used o Size and quantity of service entrance conductors

The engineer will contact the applicant at the phone numbers provided and arrange an on-site meeting to discuss the service requirements and explain

CORE’s policy and procedures. During the on-site meeting, the applicable items in STEP 2 will be discussed. Be prepared to show plans and drawings to the engineer. A recorded plat of the property may be required.

It may be necessary for the applicant to obtain right-of-way if the routing of the power line crosses a property on which CORE does not have an easement. The engineer will instruct the applicant in this regard, when necessary. The engineer will design, route, and stake the line extension at that time or later in certain situations.

STEP 2

o Survey/location of property pins, including corner, points of line and road right-of-way, as required o Location of well, septic system, and leach field o Location of driveway or other access o Location of structures o Location of the meter o Electric service requirements: voltage, amp size, phase o Right-of-way acquisition o Recorded Plat

Phase 2 – Contract and Construction

When the design is complete, the engineer will contact the applicant with an estimated cost and copy of construction print for review. A construction contract will be sent to the applicant with an estimated cost that is valid for

60 days. If redesigns are required, payment of an additional design fee may be required. If the construction contract expires, the work order will be canceled and a new work order will be required with an additional design fee. The items shown within STEP 3 are required before a job can be released for construction.

STEP 3

o Signed construction contract o Payment of total amount due o Signed and notarized easements and/or filed final plat, if required o Payment of outstanding balances on other accounts, if required o Posting of the street address or addresses on the property

Following construction of distribution facilities, CORE will set a meter in accordance with the stipulations shown in STEP 4. Typically, the meter can be set within three to ten working days following the receipt of the inspector’s approval of the temporary or permanent meter inspection.

Other permitting requirements may apply to some jobs.

STEP 4

o Establishment of a billing account per each metered location o Meter loop constructed to current CORE specifications o Meter loop constructed in location approved by CORE o Meter inspection approved by the Electrical Inspector o Service order issued to set meter and energize service

ELECTRIC SAFETY AND CODE CLEARANCES

It is the policy of CORE to operate the transmission and distribution electric system with the highest degree of care and safety for the public and CORE employees. To ensure the care and safety needed for an electrical distribution system, the

National Electrical Safety Code (NESC) is used for design, construction, maintenance, and operation of the electrical transmission and distribution system by CORE. The current National Electrical Safety Code in effect at the time of distribution installation will apply. CORE reserves the right to terminate service without prior notice when hazardous conditions exist.

Contact with electric lines can result in SEVERE INJURY OR DEATH! Federal

OSHA standards and Colorado State Statutes require that all equipment be maintained at a minimum distance of twenty feet (20’) from 12.47kV and twenty feet (20’) from transmission overhead lines.

If work near an overhead electric line is anticipated, contact CORE Operations

Department at (720) 733-5555 at least 24 hours in advance for assistance in avoiding contact with any energized facilities.

Any attachments to existing facilities that may violate the minimum clearances as determined by the National Electrical Safety Code must be reported ninety (90) days prior to attaching to CORE’s facilities by contacting CORE’s Engineering

Department at (303) 688-3100.

To comply with NESC requirements, easement and right-of-way grades cannot be changed more than six inches (6”) by excavation or filling without prior written approval of all utility companies involved. Full cost of any necessary alteration or relocation of utility lines will be borne by the member requesting the change.

If a violation has already occurred and CORE determines that relocating the existing facilities is necessary, CORE will perform this relocation at the expense of the property owner or party creating the violation.

If CORE determines that relocation is not feasible, other alternatives will be considered; however, CORE will take the steps necessary to protect the safety of the public and the electric facilities at the expense of the party creating the clearance violation.

Maps of CORE facilities are not generally provided to the public. If required for engineering, maps may be requested through the Utility Notification Center by dialing 811.

LOCATES FOR UNDERGROUND UTILITIES

CALL BEFORE YOU DIG! 1-800-922-1987 or 811

• Contact the Utility Notification Center by dialing 811 or visit www.uncc.org, before you dig.

• Trained service personnel will locate CORE’s underground electric facilities (up to the meter) at no cost.

• Member owned underground facilities (beyond the meter) will require a private locating service at the requestor’s expense.

• Do not start grading or excavation work until all underground facilities have been located.

CALL UTILITY NOTIFICATION

CENTER OF COLORADO

1-800-922-1987 or 811

CALL 3 BUSINESS DAYS IN ADVANCE

BEFORE YOU DIG, GRADE, OR EXCAVATE

FOR THE MARKING OF UNDERGROUND

CORE UTILITIES.

http://www.uncc.org/

RIGHT-OF-WAY, EASEMENTS, AND ACCESS

Types of Easements

CORE generally uses two types of easements:

• A platted/dedicated easement is provided to CORE by virtue of a dedication statement for every platted subdivision. A five-foot (5’) side lot and fifteen-foot (15’) front lot easement are typical platted easements. In some cases, a rear lot design will require a dedication of ten-foot (10’) easement on the rear lot. However, if the subdivision is served by overhead facilities or if larger easements are necessary, CORE will require additional easements.

• CORE requires the member to grant, at no cost to CORE, easements for power lines and any associated equipment prior to installation of any CORE facilities. In the event CORE is required to cross property other than that of the member requesting service, the new member will be required to obtain all easements. Please note that all easements require a legal survey to be provided for documentation.

Access to Utility Easements

Periodically CORE may need to access facilities within the utility easement.

Therefore, CORE requires reasonable access to facilities. To access facilities, CORE may use existing roads, driveways and/or entrance thru fenced yards.

General Restrictions on Easements/Right-of-Way

• To comply with NESC requirements, easement and right-of-way grades cannot be changed more than six inches (6”) by excavation or filling without prior written approval of all utility companies involved. Full cost of any necessary alteration or relocation of utility lines will be borne by the member requesting the change.

• Fences and landscaping may be installed on utility easements, except where such materials would prevent access to utility lines or conflict with utility equipment.

• Permanent structures or buildings are not allowed within the utility easement, below CORE’s overhead conductors, or above CORE’s underground cables.

Landscaping on Utility Easements (Working Space)

• Call the Utility Notification Center, toll-free, 1-800-922-1987 or 811, prior to digging.

• No improvements that conflict with or interfere with construction, maintenance or access to utilities shall be placed within the utility easements.

Prohibited improvements include, but are not limited to, permanent structures, buildings, counter-forts, decks, stairs, window wells, air conditioning units, private gas lines, parking lot lights, retaining walls/components and other objects that may interfere with the utility facilities or access, use and maintenance thereof. Prohibited improvements may be removed by the entities responsible for providing the utility services. The owners of the property subject to or adjacent to the utility easements shown herein are responsible for the maintenance and operation of such areas, which does not include utility lines and related facilities. When the owner(s) or adjacent owners fail to adequately maintain such utility easements, including the removal of prohibited improvements, the maintenance, operation, reconstruction and removal shall be at the cost of the owner(s).

• For Transmission and Distribution Right of Way Planting Guidelines, please refer to Appendix A.

A minimum clearance is required around all vaults and pad mounted equipment. A distance of 10 feet must be kept clear in front of all service doors. Equipment side clearances vary from 1.5 to 3 feet.

• Trees should be planted far enough away from pad mounted equipment so that, at maturity, overhanging branches will not obstruct a crane setting or removing equipment. It is best to select trees with supple branches that can be tied back without risk of breaking.

• Responsibility for upkeep and any landscaping maintenance in a utility easement is borne by the property owner/member.

• In the event a fence must be removed by CORE to repair or maintain electrical facilities, reasonable effort will be made to replace existing fencing when repairs are completed.

• Landscaping, fences, and other obstructions shall not encroach upon the working space clearances.

• A clear and level working space shall be equal to the full width of the equipment and shall extend a minimum of 10 feet from the compartment opening for pad mount equipment. Roadways and drive-throughs are not considered working space.

• A level pad cannot be more than 18” above surrounding finished grade.

Single-phase Pad Mounted Equipment

• Single-phase pad mounted equipment shall have a minimum of 1’-6” of clear working space on the sides and rear of the equipment, and 10’ of level ground in front of the equipment. CORE’s written approval is required for any variance. Roadways and drive-throughs are not considered working space. Secondary conduits shall be located in the front right quadrant of the transformer and will maintain a minimum separation of 12” between primary and secondary conduits. Secondary cables shall not encroach into the primary side of the transformer.

Three-phase Pad Mounted Equipment

• Three-phase pad mounted equipment with cooling fins shall have a clear working space minimum of 1’-6” on the sides, 2’-6” at the rear of the equipment, and 10’ of level ground in front of the equipment. CORE’s written approval is required for any variance. Roadways and drive-throughs are not considered working space. Secondary conduits shall be located in the front right quadrant of the transformer and will maintain a minimum separation of 12” between primary and secondary conduits. Secondary cables shall not encroach into the primary side of the transformer.

Pad Mounted Switchgear

• Pad mounted air switchgear shall have a minimum clear working space of 3’ on the sides of the equipment, and 10’ of level ground in front and rear of the equipment. CORE’s written approval is required for any variance. Roadways and drive-throughs are not considered working space.

EUSERC Cabinets

• EUSERC Cabinets shall have a minimum of 3’ clear, level space beyond the door when fully open at 90-degree position. This equipment is typically placed parallel to the building wall.

Guard Posts for Pad Mounted Equipment

Cement filled guard posts shall be installed around pad mounted equipment that is exposed to vehicular traffic. The member may be required to supply and install these guard posts to protect the pad mounted equipment. These posts may be set to surround the equipment at a maximum of 5’ between posts, with a minimum clearance of 2’ on the sides and 3’ at the front and rear of the equipment. If a center post is placed in front of the doors to the equipment, a minimum clearance of 6’ is required.

TEMPORARY POWER SERVICES

A temporary service connection may be installed to supply electricity for a limited time

(up to 18 months). Services used for construction purposes, fairs, carnivals, holiday lighting, street decorations, or other uses are considered temporary.

• A billing account must be established for each specific location with CORE.

• A temporary electric meter will be installed upon receipt of the inspector’s approval of the temporary or permanent meter loop inspection.

• It is the responsibility of the applicant to obtain such an inspection and release.

• The meter will not be installed unless it meets CORE’s specifications.

• Contact Engineering Services (303) 688-3100, ext. 5302 with any questions.

• Anyone making unauthorized meter bypasses may be prosecuted.

Temporary Overhead Power Source

• A temporary service is installed on a CORE pole, preferably one equipped with a transformer.

• A temporary service may not be installed on a pole with risers or other special equipment on it.

• If a meter pole is available when temporary service is required, the applicant shall avoid installing two services by constructing a permanent service loop on the meter pole and using it for temporary purposes (check for county regulations).

Temporary Underground Power Source

• Areas with underground facilities may have metering pedestals, power pedestals, or pad-mounted transformers available.

• A metering pedestal will contain the permanent meter even while the temporary loop is in use. For this reason, a main breaker large enough to protect the permanent service must be installed in the metering pedestal before a temporary service may be connected.

• CORE supplies and installs jumpers from meter socket to breakers.

• If the source is a power pedestal or power transformer, the temporary stand must be located within 10’ of its source. The temporary stand also must be set at the permanent source as designated by CORE’s maps.

Temporary CT Metering

• CT/PT metering is required for single-phase loads greater than 320amp continuous or 400amp peak and three-phase loads greater than 200amp. See

Current Transformer – CT and Potential Transformer – PT Metering Section.

The meter housing should be installed within 12” of the CT cabinet and must be on the opposite side of CT cabinet door hinge and level with the top of the CT cabinet.

RESIDENTIAL POWER SERVICES (Single Lot, Multi-Family and

Development)

Street Lighting

• CORE offers streetlight facilities upon request to serve cities, towns, villages, residential, and commercial consumers of CORE for the installation of streetlights at or near the entrance to consumer-owned property, subdivision lighting, and highway lighting. Two styles of LED ornamental streetlight facilities are used in subdivisions with underground facilities; whereas in areas with overhead facilities; LED lights are placed on wooden poles.

• The cost of installation for a streetlight and electrical feed is typically incorporated into the distribution design of developments. The cost for streetlight facilities will vary depending upon the size of the lots, the desired location of the streetlights, and the electric sources available to serve the new streetlights.

• It will be the responsibility of the property owner or developer to contact the proper city or county authorities for streetlight specifications, as design requirements may vary.

• Should the applicant wish to install ornamental lights that are not within

CORE’s specifications, they may do so at their own expense. CORE will provide metering points at the applicant’s cost and will bill for the actual energy consumption. The applicant will be responsible for the acquisition, installation, and maintenance of all such facilities beyond the metering point.

Joint Trench

• Subdivisions with underground electrical service frequently have telephone and cable television facilities in the same trench with electrical distribution.

The applicant may contact CORE’s Engineering Department for information required to coordinate joint trenching of facilities.

• If construction is assigned to CORE’s contractor, any contracts or agreements regarding joint trench will be made with that contractor, not

CORE. Joint trench facilities are normally used for distribution lines but can include secondary (house) laterals as well.

• Gas and water lines cannot be included in the electrical trench. All utilities requesting joint trench use must be designed and ready to install at the time

CORE’s facilities are scheduled for construction.

Meter Sets

• The applicant must establish an account for new service. A New Location

Request Form will be mailed or emailed to the applicant. This form needs to be completed and returned to Engineering Services via mail or by email to engineeringservices@CORE.coop.

• If the meter is to be used strictly for temporary construction purposes only and then to be removed from the site, the applicant should indicate “temp only” on this form.

• CORE will issue a service order to set the meter upon receipt of the inspector’s approval of the temporary or permanent meter loop inspection.

• Please allow three to ten business days for the meter set to be completed.

• A deposit in the amount of an estimated 60-day bill may be required. Such deposit may be in addition to any advance, contribution, or guarantee provided for in the extension regulations.

Choosing the Right Service Voltage

CORE offers their members the voltages shown in the table below.

Service Type Voltage

Single-phase 120/240V, 3-wire*

Three-phase 120/208V, 4-wire 277/480V, 4-wire

Primary Single-Phase 7200V, 3-wire

Primary Three-Phase 7200/12470V, 4-wire

*Available for loads to a maximum demand of 100kW. Larger loads may be served, if determined feasible by a CORE engineer. All motors must be rated 10 HP or less.

Meter Locations

• An electric meter will not be located within any area considered hazardous or inside where reading, testing, or servicing of the meter may become impracticable.

• A clear and level working space of 4’ must be maintained around the meter at all times. Roadways and drive-throughs are not considered working space.

• The meter shall be located 5’ (+or-6”) at center of glass, above clear and level ground.

• The meter will be located on the front 25% of the house, ahead of any fences, and as designated by CORE’s electrical design to serve that location.

• Where meters, originally installed in accessible locations satisfactory to CORE, are rendered inaccessible by virtue of alterations or new construction by the owner of the premises or his agents, such meters shall be reinstalled at a point designated by CORE at the expense of the property owner.

• The location of meters and metering equipment shall be designated by CORE’s

Engineering Department personnel. No wiring dependent upon the meter location should be started until such location has been established. For any conflicts with meter location please contact Engineering Services immediately.

• Service disconnect shall be located within 30” and externally accessible from meter housing.

• Meter housings (must be ringless) are not provided by CORE and all terminations (line side and load side) in the meter socket are the responsibility of the member (electrician). See Specifications for Meter Housings, Locations, and Installations.

• Only one meter will be issued per structure. Contact CORE’s Metering

Department for detailed information.

• If the service is underground to a power pedestal, CORE will install a secondary lateral to the house and the meter will be located on the house.

If the service is underground to a meter pedestal, the meter is located within the meter pedestal, and the applicant will be required to install the secondary lateral to the house.

Loads greater than 320 amp continuous will require CT metering and adhere to the

EUSERC standards.

• If the service is overhead to the house, the meter will be located on the house.

• If the service is overhead to the meter pole and then underground to the house, the meter will remain on the meter pole, and the applicant will be required to install the secondary to the house.

• CT/PT metering is required for single-phase loads greater than 320amp continuous or 400amp peak and three-phase loads greater than 200amp. See

Current Transformer – CT and Potential Transformer – PT Metering Section.

Service Laterals (installed by CORE)

CORE will install the service lateral at such time that the foundation is in and backfilled to final grade (± 6”), and the location of the meter service has been marked on the foundation. To facilitate the timely installation of the service lateral and eliminate additional costs, please refer to the following procedure.

1. A New Location Request Form for the new permanent service must be requested to initiate an account prior to ordering the lateral if an account has not yet been established.

2. Notify CORE to schedule the lateral service installation by submitting a

Builder/Developer Service Lateral Form to Engineering Services for processing.

3. Mark “E” (with paint) on the foundation wall. Remember the following guidelines when marking the location of the meter socket.

a. Meters will not be located in any area considered hazardous or inside where reading, testing, or servicing of the meter may become

b. Meters will be located on the front 25% of the house, ahead of any fence, and in a direct line with CORE’s electrical facility designated to serve the house. The meter will be located 5’ (+/-6”) to center of glass above final grade.

c. A clear and level working space of 4’ must be maintained around the meter at all times.

4. Post the address of the property at the curb or in a visible location for locators and construction crews.

5. CORE will install a lateral from the electric power source to the foundation.

The wire will be coiled next to the foundation wall. The electrical service will not be energized. Once the house has been framed and sided, an electrician can then mount the meter socket, install the riser, and terminate the wire (line side and load side) in the meter socket. Note that the wire will be color coded. It is imperative that the electrician leave the color code markings on the wire and provide as much slack as possible.

6. Remove all trash and building material from the area where the service lateral will be located.

Upon notification, CORE will continuously inspect each location to verify readiness (site condition and foundation being marked for electric service entrance, etc.). The installation of the lateral will be scheduled within a period not to exceed two weeks upon verification of site readiness. If CORE’s lateral crew arrives at a site that is not ready, rescheduling the lateral could mean an additional two weeks from that date.

The builder/member will be responsible for any costs incurred from:

• Cable cuts and any damages caused by the builder or their subcontractor.

• Reinstallation of lateral due to grade changes, meter housing changes, etc.

• Additional materials, i.e., conduit under retaining walls, extended laterals due to location of house, etc.

• Relocation of lateral from original design (other side of house from its source).

Multiple Meter Installations

Multi-family

On residential multi-meter panels, the centerline of the bottom row of meters shall be a minimum of 3’ and the top row of meters shall be a maximum of 6’- 6” above finished grade or floor.

Meter base/socket jumpers shall not be used to serve house meters.

House meters shall be served in the following manor:

• A dedicated set of service entrance conductors.

• A tap at the bussing of residential multi-meter panels.

• All-in-one factory assembled multi-meter panels.

• Adjustable breaker amperage should not exceed the maximum service amperage.

If disconnects are located on different parts of the building (like an apartment complex), mapping placards will be required at the disconnect locations.

Specifications for Single-Phase 120/240V 3-Wire Meter Housings

• Housings shall be constructed from metal in accordance with the latest revision of Underwriters’ Laboratories (UL) Standard No. 414 for meter sockets. All meter housings shall be UL listed and labeled, and they shall be installed and used in accordance with their labeling.

• The line-side of each socket shall be equipped so proper sealing of the socket can be maintained by padlock. All sockets shall be ringless.

• After installation and sealing are completed, the socket shall not have any openings except as permitted by NEMA Type 3R construction.

• Meter housing installations shall be installed per National Electric Code

(NEC) procedures and shall be enforced by the local inspection authority.

All 200amp meters shall be hot sequenced except as required by the

National Electric Code (NEC). See “six-handle” rule.

• Meter housing shall be located 5 feet (+or-6”) to center glass above finished grade. On multi-meter panels, the centerline of meters shall be a minimum of 3’ and a maximum of 6’-6” above finished grade or floor. The minimum spacing between socket centers shall be 12” horizontally and 12” vertically.

• Maximum amp size to be metered by a self-contained 1Ø meter will not exceed 320amp continuous or 400amp peak loads. All single-phase services in excess of 200 amps require a class 320 meter and lever bypass meter housing unless preapproved by CORE. Class 320 meters have a maximum continuous load rating of 320 amps. Continuous loads greater than 320 amps will require CT metering which will adhere to the EUSERC standards. Members requiring CT metering that is rated at 800 amps or less may choose to use a CT cabinet instead of adhering to the EUSERC standard. See CT Cabinet Specifications for Single-Phase or Three-Phase

Service, 800 amps or less.

• Meters shall be protected from mechanical damage and have 4’ clear, level working space in front of the meters.

• Factory-built multi-meter equipment cut sheet shall be approved by CORE’s Metering Department along with a site diagram and one line.

• Multi-metered services require all sockets to be permanently labeled with an etched metal tag or permanent tag approved by CORE’s Metering Department personnel noting the service location that it feeds on the body of housing, not on the removable panel.

• All existing services that are changed or upgraded because of increased loads, transformer size, wire size, interconnection agreements, or reconstruction will be brought up to CORE’s current Standards at the member’s expense.

Additional requirements may be found on our website (www.CORE.coop).

Approval will be given to meter/load center combinations as well as multiple combinations, which meet all other provisions for meter housings.

It is understood that CORE’s approval does not mean approval in any area where there may be a conflict with any national or local code, or where the local inspecting body will have the final authority.

It is also understood that in case of a disaster, CORE will not have spare parts and will not be responsible for the repair.

Questions can be answered by CORE’s Metering Department.

Additional Requirements for 1Ø Underground Feed Residential Meter

Housings

• Meter housing minimum ampacity must be 200 Amp and capable of terminating 350 MCM aluminum wire.

• Meter will be located on the front 25% of the house, ahead of fence, and in a direct line with CORE’s electric facility designated to serve that location.

Additional Requirements for 120/208V 1Ø Hookups

• Fifth (5th) terminal is required and will be allowed in the 9 o’clock position only and must be bonded within the housing. Typically used for 1Ø network service fed by 3Ø transformer, 120/208 voltage as approved by CORE.

• The members wiring on three-wire, single-phase installations shall be so arranged that the connected load from one phase to neutral shall not exceed 60 percent of the members total connected load. The use of single-phase loads on three-phase transformers shall not unbalance the current per phase more than ten percent.

http://www.irea.coop/

CT Cabinet Specifications for Single-Phase or Three-Phase Service, 800 amps or less, 120/240V 1Ø, 3-Wire; 120/208V 3Ø, and 277/480V 3Ø

4-Wire

• Must be a single service/meter location.

• Must be 800 amps or below.

• The cabinet must have a lockable door that is hinged, opens to a minimum of 90 degrees and shall be permanently installed against a wall with adequate mounting hardware.

• CT’s in CT cabinet shall be 48” (+or-6”) from ground to center of CT at final grade.

• The meter housing should be installed within 12” of the CT cabinet and must be on the opposite side of CT cabinet door hinge and level with the top of the CT cabinet.

• Conduit from the meter housing to CT cabinet shall be 1” metal.

• Meter housing must have provision for test switch:

a. Test Switch spacing shall be 5-1/8” depth.

b. Auto shunting test switches shall not be used.

• 480V services require space on hinge side of CT cabinet for PT installation:

a. Specify on .dwg file (6” space for PT’s between CT cabinet wall and bus).

b. PT’s cannot be covered by any conductors.

• Area shall meet all other metering requirements:

a. 3’ clear and level working area in front of 90-degree open door for entire width of CT cabinet and meter housing.

b. Clear and level working space shall not be a part of a street, drive thru, etc.

• Service disconnect shall be installed within 30” and reachable of metering equipment.

• Drawing package for review shall include:

a. Cut sheet for CT cabinet.

b. Cut sheet for meter housing.

c. Site diagram.

d. One-line diagram.

• CT cabinet shall accept bar type CT’s only.

• The maximum number of conductors per phase is three (3).

• Minimum dimensions of CT cabinet:

a. Single-Phase: 24”W x 30”H x 11”D.

b. Three-Phase 208V: 30”W x 30”H x 11”D.

c. Three-Phase 480V: 36”W x 30”H x 11”D.

• Warning placards made from plastic laminate mounted with permanent adhesive or rivets shall be provided as follows:

a. CT cabinet shall have service address or unit number and voltage.

b. Meter housing shall have service address or unit number. May use a brass tag if necessary for space constraints.

c. Service Disconnect cabinet shall be labeled with address or unit number and “Service Disconnect”.

Fault Current Levels and Standard KVA Size Transformers

The most commonly used transformers installed by CORE are shown in the tables below. Tables also show the maximum available short-circuit current at the transformer’s secondary connection point.

Maximum short circuit current in amps for single-phase pole mounted transformers

240 V Windings 120 V Winding

Secondary Voltage

KVA

Min. %

Z Fault

Current Min. %

Z Fault

Current

120/240 10 1.5 2778 1.5 5556

120/240 15 1.5 4167 1.5 8333

120/240 25 1.5 6944 1.5 13889

120/240 37.5 1.5 10417 1.5 20833

120/240 50 1.5 13889 1.5 27778

Maximum short circuit current in amps for single-phase pad mounted transformers

240 V Winding 120 V Winding

Voltage

KVA

Min. %

Z Fault

Current

Min. % Z

Fault Current

120/240 15 1.5 4167 1.5 8333

120/240 25 1.5 6944 1.5 13889

120/240 37.5 1.5 10417 1.5 20833

120/240 50 1.5 13889 1.5 27778

120/240 75 1.5 20833 1.5 41667

120/240 100 1.5 27778 1.5 55556

120/240 167.5 1.5 46528 1.5 93056

COMMERCIAL/INDUSTRIAL POWER SERVICES

Street Lighting

• CORE offers to provide street lighting on public streets. It shall be the responsibility of the developer to provide lighting in private parking lots.

Joint Trench

• Subdivisions with underground electrical service frequently have telephone and cable television facilities in the same trench with electrical distribution.

The builder/developer may contact CORE’s Engineering Department for information required to coordinate joint trenching of facilities.

If construction is assigned to CORE’s contractor, any contracts or agreements regarding joint trench will be made with that contractor, not

CORE.

• Gas and water lines cannot be included in the electrical trench. All utilities requesting joint trench use must be designed and ready to install at the time

CORE’s facilities are scheduled for construction.

Meter Sets

• The applicant must establish an account for new service. A New Location

Request Form will be mailed or emailed to the builder/member. This form needs to be completed and returned to Engineering Services via mail or by email to engineeringservices@CORE.coop.

• If the meter is to be used strictly for temporary construction purposes only and then to be removed from the site, the applicant should indicate “temp only” on this form.

• CORE will issue a service order to set the meter upon receipt of the inspector’s approval if the temporary or permanent meter inspection.

• Please allow 3 to 10 business days for the meter set to be completed.

• A deposit in the amount of an estimated 60-day bill may be required. Such deposit may be in addition to any advance, contribution, or guarantee provided for in the extension regulations.

Meter Locations

• An electric meter will not be in any area considered hazardous or inside where reading, testing, or servicing of the meter may become

• A clear and level working space of 4’ must be maintained around the meter at all times. Roadways and drive-throughs are not considered working space.

• The meter shall be located 5’ (+or-6”) at center of glass, above clear and level ground.

• Service disconnect shall be within 30” and accessible from meter housing.

• Meter housings are not provided by CORE. See Specifications for Meter

Housings, Locations, and Installations.

• Only one meter will be issued per business. Strip malls and warehouses with multiple suites, units, or businesses will be allowed to have a commercial multi-metering configuration with one meter per business.

Contact CORE’s Metering Department for detailed information.

• Where multiple buildings are served by one power source (transformer), all secondary runs must be mapped by the electrical contractor.

• Brass tags required on non-movable part of meter housing(s).

• If the service is underground to a meter pedestal, the meter is located within the meter pedestal, and the applicant will be required to install the secondary lateral to the building load.

• If the service is overhead to the building, the meter will be located on the building.

• If the service is overhead to the meter pole and then underground to the building, the meter will remain on the meter pole, and the applicant will be required to install the secondary to the building.

• CT/PT metering is required for single-phase greater than 320 amp continuous or 400 amp peak loads and three-phase greater than 200 amp. See Current

Transformer – CT and Potential Transformer – PT Metering.

Multiple Meter Installations

Nonresidential

On nonresidential multi-meter panels, the centerline of meters shall be a minimum of 3’ and a maximum of 6’-6’’ above finished grade or floor. The minimum spacing between socket centers shall be 12” horizontally and 12” vertically.

Meters shall be protected from mechanical damage. Factory-built multi -meter equipment shall be approved by CORE’s Metering Department.

Cable Limits for Three-Phase Pad-Mounted Transformers

75 – 300 kVA Transformers Maximum 5 runs of 500 MCM AL/CU conductor. Connected by two-hole NEMA compression lugs.

500-2000 kVA Transformers Maximum 8 runs of 750 MCM AL/CU conductor. Connected by two-hole NEMA compression lugs.

3000 kVA Transformer Maximum 12 runs of 750 MCM AL/CU conductor. Connected by two-hole NEMA compression lugs

NOTE: The member shall provide an additional 10’ of cable for transformers installed on vaults to accommodate transformer replacements or upgrades. CORE will supply two-hole NEMA compression lugs.

Voltages

CORE offers their members the voltages shown in the table below.

Service Type Voltage

Single-phase 120/240V, 3-wire*

Three-phase 120/208V, 4-wire 277/480V, 4-wire

Primary Single-Phase 7200V, 3-wire

Primary Three-Phase 7200/12470V, 4-wire

*Available for loads to a maximum demand of 100kW. Larger loads may be served, if determined feasible by a CORE engineer. All motors must be rated at 10 HP or less.

Cable Limits for Single-Phase Pad-Mounted Transformers

Seven (7) runs is the maximum number of secondary conductors allowed for single-phase transformer installations with a maximum conductor size being 350

MCM. The member shall provide an additional 10’ of cable for transformers installed on vaults to accommodate transformer replacements or upgrades.

Fault Current Levels and Standard KVA Size Transformers

The most used transformers installed by CORE are shown in the tables below.

Tables also show the maximum available short-circuit current at the transformer’s secondary connection point.

Maximum short circuit current in amps for single-phase pole mounted transformers

Maximum short circuit current in amps for single-phase pad mounted transformers

240 V Windings 120 V Winding

240 V Winding 120 V Winding

Voltage

KVA

Min. %

Z Fault

Current Min. %

Z Fault

Current Secondary

Voltage

KVA

Min. % Z

Fault Current

Min. % Z

Fault Current

120/240 10 1.5 2778 1.5 5556 120/240 15 1.5 4167 1.5 8333

120/240 15 1.5 4167 1.5 8333 120/240 25 1.5 6944 1.5 13889

120/240 25 1.5 6944 1.5 13889 120/240 37.5 1.5 10417 1.5 20833

120/240 37.5 1.5 10417 1.5 20833 120/240 50 1.5 13889 1.5 27778

120/240 50 1.5 13889 1.5 27778 120/240 75 1.5 20833 1.5 41667

120/240 100 1.5 27778 1.5 55556

120/240 167.5 1.5 46528 1.5 93056

Maximum short circuit current in amps for Three-single phase pole mounted transformer bank

Maximum short circuit current in amps for Three-phase pad mounted transformers

208 V Winding 120 V Winding

3 Phase L-G

Voltage

KVA

Min. %

Z Fault

Current Min. %

Z Fault

Current

Secondary Voltage

KVA

Min. %

Z Fault

Current

120/208 10 1.5 1850 1.5 3208 120/208 75 1.5 13879

120/208 15 1.5 2776 1.5 4811 120/208 112.5 1.5 20725

120/208 25 1.5 4626 1.5 8019 120/208 150 1.5 27757

120/208 37.5 1.5 6939 1.5 12028 120/208 225 1.5 41636

120/208 50 1.5 9252 1.5 16038 120/208 300 1.5 55514

120/208 500 1.5 92524

120/208 750 2.5 83272

120/208 1000 5.0 55514

480 V Winding 277 V Winding

3 Phase L-G

Voltage

KVA

Min. %

Z Fault

Current Min. %

Z Fault

Current Secondary

Voltage

KVA

Min. % Z

Fault Current

277/480 10 1.5 802 1.5 1390 277/480 75 1.5 6014

277/480 15 1.5 1203 1.5 2084 277/480 112.5 1.5 8981

277/480 25 1.5 2005 1.5 3474 277/480 150 1.5 12028

277/480 37.5 1.5 3007 1.5 5211 277/480 225 1.5 18042

277/480 50 1.5 4009 1.5 6948 277/480 300 1.5 24056

277/480 500 1.5 40094

277/480 750 2.5 36084

277/480 1000 4.0 30070

277/480 1500 4.5 40094

277/480 3000 5.0 72169

Specifications for Single & Three-Phase Self-Contained Meter

Housings (120/240V 1Ø, 3-Wire; 120/208V, 3Ø, and 277/480V 3Ø 4-Wire)

• Housings shall be constructed from metal in accordance with the latest revision of Underwriters’ Laboratories (UL) Standard No. 414 for meter sockets. All meter housings shall be UL listed and labeled, and they shall be installed and used in accordance with their labeling.

• The line-side of each socket shall be equipped so proper sealing of the socket can be maintained by padlock. All sockets shall be ringless.

• After installation and sealing are completed, the socket shall not have any openings except as permitted by NEMA Type 3R construction.

• Meter housing installations shall be installed per National Electric Code

(NEC) Standards and shall be enforced by the local inspection authority. All 200amp meters shall be hot sequenced except as required by the National Electric Code (NEC). See “six-handle” rule.

• Center of glass on meter housing shall be located 5’ (+or-6”) above finished grade. A clear and level working space of 4’-0” must be always maintained around the meter

• All commercial applications will have a meter socket with a heavy-duty locking jaw with lever-type bypass or meet the EUSERC Standards for commercial metering with safety sockets. On multi-meter panels, the centerline of meters shall be a minimum of 3’ and a maximum of 6’-6” above finished grade or floor. The minimum spacing between socket centers shall be 12’ horizontally and 12” vertically.

• All sockets (including CT/PT installations) will be permanently labeled with an etched metal tag or permanent tag noting the service location that it feeds on the body of housing, not on the removable panel.

• Maximum amp size to be metered by a self-contained 3Ø meter will not exceed 200 amps.

• All existing services that are changed or upgraded because of increased loads, transformer size, wire size, or reconstruction will be brought up to CORE’s current Standards.

• All 3Ø polyphase sockets will have a seven-terminal mounting block with a heavy duty 200-amp locking jaw with lever-type bypass or meet the EUSERC Standards for commercial metering with safety sockets.

• All 3Ø member will provide their own single-phase protection.

• All 1Ø meter housing will require lever-type-bypass.

• Maximum amp size to be metered by a self-contained 1Ø meter will not exceed 320amp continuous or 400amp peak loads. All single-phase services in excess of 200 amps require a class 320 meter and lever bypass meter housing unless preapproved by CORE. Class 320 meters have a maximum continuous load rating of 320 amps.

Continuous loads greater than 320 amps will require CT metering which will adhere to the EUSERC Standards. Members requiring CT metering that is rated at 800 amps or less may choose to use a CT cabinet instead of adhering to the EUSERC standard. See CT Cabinet

Specifications for Single-Phase or Three-Phase Service, 800 amps or less.

• Brass tags required on non-movable part of meter housing(s).

• Self-contained meter housing shall have a spare access hole. The spare access hole shall be capped and secured from the inside of the meter housing with a metal cap such that the cap cannot be removed from the outside of the housing. The spare access hole shall be sized at 2 inches for 200A and above rated meter housings, or 1.5 inches for

150A and below meter housings.

Additional requirements may be found on our website (www.CORE.coop).

Approval will be given to meter/load center combinations as well as multiple combinations, which meet all other provisions for meter housings.

It is understood that CORE’s approval does not mean approval in any area where there may be a conflict with any national or local code, or where the local inspecting body will have the final authority.

It is also understood that in case of a disaster, CORE will not have spare parts and will not be responsible for the repair.

Specifications for Meter Location and Installation

Subject to CORE’s Metering Department personnel approval, the member shall provide and maintain, without cost to CORE, an easily accessible meter location on or within the premises to be supplied service. All locations must comply with

CORE Rates and Regulations.

Where meters, originally installed in accessible locations satisfactory to CORE, are rendered inaccessible by virtue of alterations or new construction by the owner of the premises or his agents, such meters shall be reinstalled at a point designated by CORE at the expense of the property owner.

The location of meters and metering equipment shall be designated by CORE. No wiring dependent upon the meter location should be started until such location has been approved.

Meters

• Meters shall be installed outdoors in accordance with rules governing outdoor meter installations. Meters and EUSERC cabinets are to be installed outside the building either free standing (EUSERC cabinet) or against an exterior wall (EUSERC cabinet or meter) allowing unobstructed access by CORE’s personnel.

• EUSERC Cabinets shall have a minimum of 3’-0” clear and level space beyond the door when opened at 90-degree position.

• The cabinet or meter may NOT be installed in an interior room, courtyard, or any other structure that could possibly have a lockable entry way.

• If the EUSERC cabinet, metering, and main disconnect are not installed in a proper location and manner, CORE will refuse service. Major changes may be required at the member’s cost and delay the service connection.

• Meter mounting and associated equipment shall be mounted securely and plumb. Where attachment is made to masonry, concrete, or plaster walls, expansion bolts, plugs, or anchors shall be used.

• Meter mountings shall not be placed in a location where meter reading or servicing may become impracticable or may cause damage to any part of the member’s premises.

• Meter housing must be located within 30” of load side disconnect.

Line-side Conductors

• The line-side conductors in meter mounting devices shall be required to be separated from the load-side conductors by means of permanent barrier.

• Access to the line-side conductors shall be sealable.

• No conductors other than line-side conductors shall be permitted in line-side conduits, troughs, or lug landings.

• All line-side (unmetered) conductors must be in a continuous length of conduit or CORE sealed raceway from the point of delivery to the service entrance.

• Line-side and load-side conductors shall not be combined within the same conduit or raceway.

• The use of line-side (ahead of the meter) disconnects or other open devices are not permitted with exception to 277/480V self-contained commercial accounts and/or multiple-meter stacks following the NEC 6 handle rule.

• CORE’s Distribution Operations personnel must approve the location of any ahead-of-the-meter devices.

• An approved location will be limited to installation in secured switch gear or on the same surface wall directly ahead and within 24”…