ITB_CIP250996_Parking_Lot_Improvement_Program_-_Exhibit_C_-_Conduit_Policy_-_Commercial.pdf

Electric Engineering Division

RULES AND REGULATIONS

FOR CONDUIT INSTALLATION

(COMMERCIAL & RESIDENTIAL)

LATEST REVISION: 08/23/2023

Dear Developer:

Over the next few months, the City of Ocala Electric Utility (OEU) will be working closely with you and your contractors to install the electrical conduit system for your project. We in the Electric Engineering Division are looking forward to working with you and your contractors and want the installation to proceed as smoothly as possible.

Attached, please find the OEU Rules and Regulations for Conduit Installation to be referenced by your electrical conduit contractor. If the contractor has any questions that are not addressed in this guide, please contact the OEU representative responsible for the project.

Respectfully, Ocala Electric Utility

1805 NE 30th Ave., Bldg. 400 Ocala, FL 34470-4875 Phone: (352) 351-6620

Fax: (352) 401-6961

TABLE OF CONTENTS

PAGE

A. TABLE OF CONTENTS …………………………………………………………….………..…. 3

B. TERMS AND DEFINITIONS …………………………………………………….……………... 5

C. DEVELOPER’S RESPONSIBILITIES ………………………………………………………….. 7

D. TRENCH SPECIFICATIONS AND PROCEDURES …………………………………………

E. REQUIREMENTS FOR JOINT USE OF TRENCH ………………………………………

F. CONDUIT SPECIFICATIONS …………………………………………………………………. 10

G. CONDUIT PROCEDURES

1. RACEWAYS ……………………………………………………………………

2. RISER STUB-UPS ………………………………………………………………

3. TRANSFORMER LOCATIONS …………………………………………………………. 12

4. PRIMARY CABINET LOCATIONS ………………………………………………

H. SUMMARY ……………………………………………………………………………

I. SYMBOLS ………………………………………………………………………………………. 14

J. EXHIBITS

1. Typical Riser Pole Stub-up ………………………..…………………………………

2. Concrete Encasement and Support Placement …………………..…….…………

3. Typical Trench Line w/ Respect to Right-of-Way ………………………………

4. Typical 1-phase Transformer Location ……………………………………………………. 18

5. Typical 3-phase Transformer Location ……………………………………………………. 19

6. Typical 1-phase Primary Cabinet Location …………………………………………

7. Typical 3-phase Primary Cabinet Location (Exhibits A & B) ………………………….…. 21

8. Conduit Stub-up End Requirements …….……...…………………………………

9. 1-phase Transformer Conduit Placement in Easement …………………………………….. 24

10. Warning Tape Placement ……………………………………………………………

11. Minimum Clearance (Cable TV, Internet, Telephone) …………………………………….. 26

12. Minimum Clearance (Water, Sewer, Gas) …………………………………….…………… 27

13. Minimum Horizontal Clearance Around Equipment ………………………………………. 28

14. Typical Street Light Vault Location ………………………………………………………... 29

15. Typical Secondary Pedestal Location ……………………………………………

16. Typical Secondary Vault Location ….……………………………………………

17. Service Stub-outs at Transformer (Future Use) ….………………………………………… 32

18. Temporary Service at Transformer or Secondary Vault …………………………………… 33

19. Multiple Conduits in Trench ……………………………………………………………….. 34

20. SDR-13.5 or HDPE Flexible Bore Pipe Stub-ups ………………………………………….. 35

21. Meter Socket Spacing Requirements ………………………………………………………. 36

22. Acceptable URD Combination Meter Socket w/ Breaker Panel ……………………

23. Secondary/Service Conduit Installation from Riser Pole ………………………………….. 38

24. Secondary/Service Conduit Installation from Padmount Transformer ……..……..……..… 39

25. Storm Water Diversion for Padmount Equipment …………………………………

26. 15KV Primary Cable Conduit Sizing Chart …..……………………………………………. 41

TABLE OF CONTENTS

PAGE

J. EXHIBITS

27. 600V Multi-plex Cable Conduit Sizing Chart ...…………………..…………………

28. 600V THHN-AL Cable Conduit Sizing Chart ......…….…………………………

29. 600V THHN-CU Cable Conduit Sizing Chart …………………………………………….. 44

30. 3-Phase Transformer Pad Dimensions (45-1000 KVA) …………………………………… 45

31. 3-Phase Transformer Pad Dimensions (1500-2500 KVA) ………………………………… 46

32. 3-Phase Secondary Cabinet Pad Dimensions (Small Cabinet) …………………………….. 47

33. 3-Phase Secondary Cabinet Pad Dimensions (Large Cabinet) …………………………….. 48

34. 3-Phase Secondary Cabinet Dimensions (Small Cabinet) …………………………………. 49

35. 3-Phase Secondary Cabinet Dimensions (Large Cabinet) …………………………………. 50

36. 3-Phase Transformer & Cabinet Trough (Front to Back) ………………………………….. 51

37. 3-Phase Transformer & Cabinet Trough (Side to Side) ……………………………………. 52

TERMS AND DEFINITIONS

Conduit System: Any combination of duct, conduits, cabinets, and vaults joined to form an integrated whole.

Conduit Stub-up: Any vertical length of conduit that allows above ground access to an underground electrical conduit raceway.

Developer: Architect, engineer, electrician, owner, or contractor responsible for the installation of the electric facilities.

Utility Easement: A legal document giving the Utility limited use of private property to provide electric service.

Conduit Ells: Heavy wall rigid Schedule 40 PVC conduit elbow; gray in color; Electrical Grade, radius according to size:

1” diameter PVC = 18” radius elbow minimum 2”, 3”, 4” diameter PVC = 24” radius elbow minimum 6” diameter PVC = 36” radius elbow minimum 8” diameter PVC = 48” radius elbow minimum

Final Grade: The grade at the time of completion of the site including all buildings.

Overhead Construction: The standard placement of electric distribution lines on wood, metal, fiberglass composite, or concrete poles above ground.

Point of Service: The point within a parcel of property that is determined the closest and most reasonable for Ocala Electric Utility to provide electric service. This is typically where OEU facilities end, and the customer’s facilities begin.

Primary Cable: Electrical cable used for the purpose of transmitting high voltage (more than one thousand volts) from one point to another.

Primary Riser: Any vertical length of conduit used to transition overhead primary to underground primary.

Primary Cabinet: An above ground metal enclosure, used by the utility for joining primary electrical cables.

Primary Conduit: Conduit intended for use with primary cable. Must be 3” diameter or larger.

Raceway: An enclosed channel designed expressly for holding wire or cables. A conduit is a raceway, so is a duct.

Right-of-way: A strip of land occupied or intended to be occupied by a road, crosswalk, railroad, electric power line, oil or gas pipeline, water main, sanitary or storm sewer main, or for similar use.

Riser Stub-up: A vertical length of conduit installed above ell at pole or stub-up location.

Secondary Cabinet: Junction point to terminate secondary conductor. Above ground cabinet usually contains Utility cable and customer cable within the same enclosure.

Secondary Cable: Electrical cable used for the purpose of transmitting low voltage (less than one thousand volts) from one point to another.

Secondary Riser: Any vertical length of conduit used to transition overhead secondary to underground secondary.

Secondary Vault: A below ground fiberglass enclosure, used for joining secondary electrical cables.

Secondary Pedestal: An above-ground fiberglass enclosure, used for joining secondary electrical cables.

Service Wire: Cable between OEU Electric facilities and meter pedestals or meters.

Secondary/Service Conduit intended for use with secondary or service cable. Raceway between Conduit: OEU facilities and the customer’s meter.

Sweep: A gradual curve of the conduit raceway used to change direction of the conduit run.

Transformer: Electrical device used for converting voltage levels.

Transformer Pad: A ground mounted platform used to support a transformer.

Underground The placement of electric primary and/or secondary cable and conduit below Construction: final grade.

Warning Tape: Six (6) inch wide red warning tape installed in all trenches above conduit system at twelve (12) inches below final grade.

DEVELOPER’S RESPONSIBILITIES

1. Installation of the underground electric conduit system shall not begin until the contractor is issued prints stamped “APPROVED FOR CONSTRUCTION” and initialed by the OEU Engineer or Technician assigned to the project. Any print(s) that are unstamped or stamped “preliminary” cannot be used for construction. Field changes to the conduit design must be approved by OEU in writing.

2. Construction site must be within six (6) inches of final grade, or the Developer must provide elevations for the conduit route before any conduit installation may begin.

3. The conduit system must be inspected by an authorized OEU inspector, Electric Engineering Division,

(352) 351-6620 prior to closing the trench. Failure to comply will result in re-opening of the trench at the Developer’s expense.

4. The Developer will be responsible for staking all electrical cable routes, cabinets, vaults, and transformer locations as indicated in the approved construction drawings supplied by OEU. Any relocation needed after the conduit is installed will be at the Developer’s expense.

5. The Developer shall be responsible for supplying property markers, right-of-way markers, radius of curvature markers, sidewalk markers, and curb markers as needed for the electrical conduit installation before, during and after construction.

6. The Developer shall be held responsible and liable for the electrical conduit system until OEU Electric

Engineering Division accepts it. The conduit installed will be officially accepted when OEU successfully installs cable in the conduit system. All as-built drawings must be submitted to the Electric Engineering Division prior to final acceptance.

7. The Developer shall be responsible to ensure that shrubs, plants, and structures are kept nine (9) feet from the front side of pad-mount transformers, and three (3) feet from the other sides. OEU reserves the right to remove any obstructions without notice to the owner if any deviations from this standard are encountered in the field. (SEE EXHIBIT 13).

8. City, County or State Road Permits and Railroad Permits will be obtained by OEU as necessary. No construction can be started until all applicable approved permits are received.

9. If a temporary construction service is required, the meter post will be installed at the right-side rear of the transformer or the rear of the secondary vault. (SEE EXHIBIT 18).

10. For Commercial installations, the Developer shall provide service conduit and conductor from the meter can to the secondary cabinet or padmount transformer.

These specifications reflect minimum requirements and OEU reserves the right to alter or impose more stringent requirements as necessary for good engineering design.

TRENCH SPECIFICATIONS AND PROCEDURES

1. All primary and secondary conduits shall utilize the same trench whenever possible.

2. Depth: All trenches must be level and dug to allow thirty-six (36) inches of fill from the top of the conduit to final grade.

3. Width: All trenches must be a minimum of six (6) inches in width. If more than one conduit is being installed in a trench, no stacking of conduits is permitted. All conduits must lay flat in the trench.

(SEE EXHIBIT 19).

4. After the Electric Engineering Division has inspected and approved the conduit within an opened trench, the trench must then be backfilled with soil free from any debris. This backfill soil must be on site and inspected prior to use for backfilling.

5. The Developer shall be responsible for the disposal of any foreign materials that are removed from any trench.

6. The Developer shall be responsible for all compaction (if needed) within the road right-of-way and on private property. This includes all landscaping and swale reconstruction.

7. Whenever applicable, trenching and backfilling (including compaction) will conform to City, County, or

State jurisdictions. Where trench crosses present or future pavement or roadways, compaction and density testing may be required to conform to article 125-8.3 of the Florida Department of Transportation Specifications for Road and Bridge Construction.

8. The Developer shall supply and install underground warning tape directly above the conduit in all trenches and at a depth of twelve (12) inches below final grade. (SEE EXHIBIT 10).

REQUIREMENTS FOR JOINT USE OF TRENCH

For other utilities wanting to utilize the same trench with OEU, the following guidelines and requirements must be followed:

1. Utilities that are providing services with fiber optic cable, telephone cable, or coaxial TV cable are permitted to utilize an electric trench. When any of these utilities are required to occupy the same trench, each utility must maintain a minimum vertical clearance of twelve (12) inches and a minimum horizontal clearance of eighteen (18) inches separation from the electrical conduit.

(SEE EXHIBIT 11).

2. Utilities that are providing services with water pipes, sewage pipes, or natural gas pipes & lines are preferred to have their own separate trench whenever possible. If these utilities are situated parallel to an electrical conduit in the same trench or a nearby trench, each utility must maintain a minimum horizontal clearance of sixty (60) inches separation from the electrical conduit. If any of these utilities have a perpendicular crossing over or under an electrical conduit, a minimum vertical clearance of twelve (12) inches separation must be maintained. (SEE EXHIBIT 12).

CONDUIT SPECIFICATIONS

1. Size and type of conduit and ells will be specified on construction print(s).

2. When not in a loop system, all primary conduit runs for Commercial Applications shall include a spare conduit for the length of the radial, including stub-ups.

3. When not in a loop system, all primary and secondary conduit runs for Residential Applications shall include a spare conduit for the length that is inaccessible. (For example: lengthwise under driveways; or under other objects that would not allow normal trenching or digging to replace conduit in the future).

4. All conduits shall be schedule 80 rigid PVC, schedule 40 rigid PVC, or SDR-13.5 conduit electrical grade;

NEMA TC-2 specification; UL approved; rated for 90 degree C cable; furnished with coupling or integral long bell; gray in color; underground applications.

5. Conduit couplings shall be “long line” type and preferred with a center stop to ensure the proper depth of connection is made between adjoining pieces of conduit.

6. Primary/Secondary/Service/Lighting Risers shall be schedule 80 PVC conduit and are the responsibility of OEU.

7. Primary/Secondary/Service/Lighting Riser Pole Stub-ups shall be schedule 40 PVC conduit.

8. Primary/Secondary/Service/Lighting Equipment Stub-ups shall be schedule 40 PVC conduit.

9. Primary/Secondary/Service Ells shall be 90-degree elbows, schedule 40 PVC, with the following minimum dimensions: 2”, 3”, & 4” PVC = 24” radius; 6” PVC = 36” radius; 8” PVC = 48” radius.

10. Lighting Equipment Ells shall be 90-degree elbows, schedule 40 PVC, with the following minimum dimensions: 1” PVC = 18” radius; 2” & 3” PVC = 24” radius.

11. C.T. Metering Ells shall be 90-degree elbows, schedule 40 PVC, 1” PVC = 18” radius minimum.

12. C.T. Metering Conduit raceways shall be 1” schedule 40 PVC conduit. Maximum length from the transformer pad to metering equipment to be twenty-five (25) feet.

13. Primary/Secondary/Service/Lighting Conduit raceways shall be schedule 40 PVC or SDR-13.5 electrical grade conduit. If SDR-13.5 conduit is used, the two ends of each separate conduit run must be schedule 40 PVC for the last ten (10) feet and adjoined to approved schedule 40 PVC elbows. Bending or flexing the SDR-13.5 conduit into a 90-degree elbow shape is not permissible. (SEE EXHIBIT 20).

CONDUIT PROCEDURES

Raceways:

1. Primary conduit runs shall not have more than three (3) bends within each run regardless of whether the bend is constructed from a 90-degree or 45-degree ell. This includes the ells for stub-ups.

2. Field bending of conduit, by heating, is not permitted.

3. Any conduit that passes under pavement must be encased in concrete with a minimum of six (6) inches of concrete on top and bottom, and three (3) inches on both sides. Installation of concrete is not a normal construction practice. Conduit supports must be installed every five (5) feet and the conduit must be secured in a manner that will prevent the conduit from floating during the installation of the concrete.

(SEE EXHIBIT 2).

4. Conduit shall be installed in straight lines and be consistently level. Sweeps shall not be used unless specified on the construction print. If more than one conduit is being installed, the placement of conduits must be installed in a horizontal, side by side configuration. (SEE EXHIBIT 19).

5. Depth of Conduit: Primary and secondary conduit - minimum thirty-six (36) inches (to the top of the conduit) below final grade. (SEE EXHIBITS 4-7).

6. A continuous length of polypropylene 200-pound pull line shall be installed in each conduit with an excess of ten (10) feet secured at each end. (Spare riser conduits shall have thirty (30) feet of excess length of nylon pull string for future use). The cord shall be installed after the conduit is glued together and all joints are cured to prevent the cord from sticking to the conduit. (SEE EXHIBIT 8).

7. Open ends of all conduits shall be covered or sealed with duct tape applied at double thickness. The tape shall cover the entire opening and all exposed string to prevent entry of water and other foreign materials.

This also includes unfinished conduit runs left in a trench at the end of each workday. (SEE EXHIBIT 8).

8. All conduit runs shall be marked at the top of the stub-up with the same identification number as the first up-line or down-line electrical device to identify ends of conduit runs. Marks shall be made with a permanent marking pen, black in color. Identification numbers are indicated on the construction print with an alphanumeric character (for example: F1123). Any questions should be referred to the OEU representative responsible for the project.

9. PVC cleaner and cement shall be applied to all conduit joints in accordance with the manufacturer’s specifications.

10. The raceway(s) are to be clear of any obstructions. The utility will pull a steel mandrel through the raceway(s) to verify proper installation. The contractor must correct any obstructions encountered.

Riser Stub-ups:

1. Riser stub-ups at OEU poles shall consist of a ninety (90) degree schedule 40 PVC ell at the bottom of the trench with a schedule 40 stub-up that is to extend a minimum of two (2) feet above final grade. Contractor shall supply and install these stub-ups on the side of the pole opposite of oncoming traffic, often referenced as the field side. (SEE EXHIBIT 1).

2. Primary, secondary, and service riser pole conduits shall be installed by OEU and adjoined to the conduit stub-ups installed by the contractor.

Transformer Locations:

1. All conduits shall be stubbed up and capped at a minimum of four (4) feet above final grade at all transformer locations. All stub-ups shall be schedule 40 PVC.

2. There shall be a four (4) inch minimum and seven (7) inch maximum separation between the primary and secondary conduit for single-phase transformer locations. (SEE EXHIBIT 4).

3. There shall be an eight (8) inch minimum separation between the primary and secondary conduits for all three-phase transformer locations, unless otherwise specified on transformer pad drawing.

(SEE EXHIBIT 5).

4. OEU is responsible for supplying concrete pads for all single-phase transformers.

5. The Developer is responsible for supplying concrete pads for all three-phase transformers and/or three-phase secondary cabinets. The Developer can either purchase pre-manufactured concrete pads for this equipment, or they can build their own concrete pads. All equipment pads built by the Developer must have the pad forms inspected by OEU prior to pouring concrete. Dimensions of equipment pads are site-specific and must be approved by OEU prior to construction. All equipment pads must use #3 reinforcing rods to be installed twelve (12) inches on center, and the concrete must be cured to 3000 PSI at twenty-eight (28) days. Concrete pad thickness must be seven (7) inches. (SEE EXHIBITS 30-37).

Primary Cabinet Locations:

1. Conduit stub-ups at all single-phase primary cabinet locations shall be grouped together with one (1) inch of separation between each conduit. The conduit shall be stubbed up and capped at a minimum of four

(4) feet above final grade. Conduit configuration shall conform to the ground sleeve opening (12” x 24”).

All stub-up conduits shall be schedule 40 PVC. (SEE EXHIBIT 6).

2. Conduit stub-ups at all two (2) and three (3) phase primary cabinet locations shall be grouped in phases.

Same phase conduits shall have one (1) inch of separation between each conduit and six (6) inches shall separate the phases. The conduit shall be stubbed up and capped at a minimum of four (4) feet above final grade. Conduit configuration shall conform to the ground sleeve opening (12” x 54” for 200A or 17” x 71” for 600A). All stub-up conduits shall be schedule 40 PVC. (SEE EXHIBIT 7).

SUMMARY

WORK TO BE PERFORMED AND MATERIAL TO BE FURNISHED BY THE DEVELOPER:

1. Open and close all trenches as required by the work order.

2. Furnish and install all conduits as required by the work order.

3. Provide a pull line in each conduit run that will be utilized by OEU.

4. Supply and install warning tape above all conduit runs.

5. For 3-phase applications, construct concrete equipment pads per work order specifications.

6. For Commercial applications, install secondary/service cable from the transformer to all other equipment as required by the work order.

WORK TO BE PERFORMED AND MATERIAL TO BE FURNISHED BY THE OEU:

1. Furnish and install distribution transformers.

2. Furnish and install all primary and secondary cabinets, vaults, or pedestals.

3. Furnish, and install primary (high voltage) conductors.

4. For Residential applications, install secondary/service cable from the transformer to all other equipment as required by the work order.

5. Provide all construction prints needed for the electrical conduit installation.

6. Perform regular inspections of the conduit system as it is being installed.

7. Furnish and install all conduits that adjoin to the Developer’s riser pole stub-ups.