Section Cover Page
Section 26 04 10
Underground Service and
Service Entrance
2010-11-01
Use this Section to specify Contractor's responsibilities for underground services from a utility pole or
pad mounted transformer when direct buried cable, cable in conduit, or ductbank is used. Coordinate
this Section with Section 01 21 14 - Service Connections. Ensure that Section 01 21 14 specifies
scope of work that will be performed by Utility. Utility charges for service lines and connections will
normally be included as a cash allowance. When the underground service requires the use of a
ductbank, ensure that Section 26 05 43 - Underground Ductbanks is included.
This Master Specification Section contains:
.1
This Cover Sheet
.2
Data Sheet - General
.3
Specification Section Text:
.4
1.
1.1
1.2
1.3
1.4
1.5
General
Related Requirements
Coordination
Detail Drawing
Quality Assurance
Delivery, Storage and Handling
2.
2.1
2.2
2.3
2.4
2.4
Products
Direct Buried Cable
Drain Assembly
Cable Lugs
Protective Material for Direct Buried Cable, Conduit and Ducts
Concrete Encasement Materials
3.
3.1
3.2
3.3
3.4
Execution
Trench Excavating
Direct Buried Cable Installation
Cable in Conduit or Duct Installation
Cable in Underground Ductbank
Detail Drawing
26 04 10.01 Underground Service Entrance Drain Assembly Detail
BMS Basic Master Specification
Alberta Infrastructure
Master Specification System
Page 0
Data Sheet - General
2010-11-01
Section 26 04 10
Underground Service and
Service Entrance
UNDERGROUND SERVICE INSTALLATION METHODS
Two methods are included in this Section for installation of underground services to a building. Select
the most appropriate method.
.1
Direct Buried Cable: generally limited to single and multiple family residential type construction.
.2
Cable in Conduit or Duct: generally used for commercial and institutional buildings.
CABLE PROTECTION
Direct Buried Cable: provide physical protection for direct buried cable in areas with vehicular traffic.
Cable in Conduit or Duct: provide concrete encasement for cable in conduit or duct when:
.1
Service capacity is 800 Amperes or greater, or
.2
Soil conditions are not uniform over length of service and shear conditions could develop.
END OF DATA SHEET
BMS Basic Master Specification
Alberta Infrastructure
Master Specification System
Page 01
Section 26 04 10
Underground Service and
Service Entrance
Page 1
Plan No:
Project ID:
1.
General
1.1
RELATED REQUIREMENTS
.1
.2
.3
.4
.5
.6
.7
.8
.9
1.2
Service Connections:
Concrete:
Plumbing:
Wire and Cable:
Conduit:
Underground Ductbanks:
Utility Metering:
Fill Materials:
Trench Excavating and Backfilling:
Section 01 21 14.
Section 03 30 00.
Section 22 42 00.
Section 26 05 13.
Section 26 05 34.
Section 26 05 43.
Section 27 27 13.
Section 31 05 13.
Section 31 23 38.
COORDINATION
.1
Coordinate work of this Section with Utility.
.2
Coordinate work of this Section with work specified in Section 31 23 38.
1.3
DETAIL DRAWING
.1
Following detail drawing is appended hereto and forms part of this Section:
.1
26 04 10.01: Underground Service Entrance Drain Assembly
SPEC NOTE: Delete Detail Drawing if detail is being included on drawings.
1.4
QUALITY ASSURANCE
.1
Regulatory Requirements: Install materials in accordance with governing standards,
requirements of electric utility and Authority Having Jurisdiction.
.2
Certifications; Provide the following during the course of the Work:
.1
1.5
Compliance Certification: Provide certificates from manufacturer indicating
tested performance requirements required by Authorities Having Jurisdiction and
as specified in this Section.
DELIVERY, STORAGE AND HANDLING
.1
2010-11-01 BMS Version
Separate waste materials for [reuse] [and] [recycling] in accordance with Section
01 74 19 - Waste Management and Disposal.
Section 26 04 10
Underground Service and
Service Entrance
Page 2
Plan No:
Project ID:
2.
Products
2.1
DIRECT BURIED CABLE
.1
2.2
[Service Entrance Cable] [Armoured Cable]: as specified in Section 26 05 13.
DRAIN ASSEMBLY
.1
Provide [25] [ ] mm drain holes in bottom of each conduit.
.2
Provide fabricated [50] [ ] mm PVC drainage assembly with saddle cutouts for each
conduit [as shown in detail 26 04 10.01] [as detailed on drawings].
SPEC NOTE: Provide a drain assembly when it is necessary to provide drainage for conduit and
manholes and other means of drainage is not provided. Underground Service Entrance Drain
Assembly detail may be included as part of this section or on drawings. Edit this Section accordingly.
2.3
CABLE LUGS
.1
2.4
Cable lugs: suitable for application and acceptable to Utility.
PROTECTIVE MATERIAL FOR DIRECT BURIED CABLE AND CONDUIT
AND DUCTS
.1
Sand: as specified in Section 31 05 13.
.2
Planking: [38 x 140] [
.3
Concrete: [25] [
] mm pressure treated fir.
] MPa [red] [
] colour, as specified in Section 03 30 00.
SPEC NOTE: Provide planking above utility services where services are not installed in conduit and
cross areas with vehicular access.
OR
2.4
CONCRETE ENCASEMENT MATERIALS
.1
Concrete: as specified in Section 03 30 00 and as follows:
.1
.2
.3
2010-11-01 BMS Version
Strength: [20] [ ] MPa.
Aggregate Size: 20 mm maximum.
Colour: [red] [
] permanent additive type.
Section 26 04 10
Underground Service and
Service Entrance
Page 3
Plan No:
Project ID:
.2
Reinforcing Steel: as specified in Section 03 30 00 and as follows:
.1
.2
[ ] stirrups at [ ] mm spacing.
[ ] M continuous bars.
3.
Execution
3.1
TRENCH EXCAVATING
.1
Excavate trenches for underground service as specified in Section 31 23 38 and as
follows:
.1
Excavate along service routing indicated on drawings.
.2
Excavate to depth required to ensure minimum [900] [
[conduit] [cable] and finish grade.
.3
Slope trench [150] [
] mm cover between
] mm per 30 m length to low point indicated on drawings.
SPEC NOTE: Select the most appropriate installation method from the following:
3.2
DIRECT BURIED CABLE INSTALLATION
.1
Provide [38] [ ] mm conduit from [meter base] or [service entrance disconnect] to point
[600] [ ] mm below finished grade.
.2
Seal conduit at building entrance location after cable installation.
.3
Level trench with minimum 75 mm layer of sand prior to cable installation.
.4
Backfill with sand to 100 mm over cable.
.5
Protect cable with [38 x 140] [
subject to vehicular traffic.
] mm planking where cables cross driveways or areas
OR
.5
3.3
Protect cable with 50 mm concrete topping extending 100 mm beyond each side of cable
where cables cross driveways or areas subject to vehicular traffic.
CABLE IN CONDUIT OR DUCT INSTALLATION
.1
Level bottom of trench with minimum 75 mm layer of sand prior to conduit or duct
installation.
.2
Use Conduit to duct adapters when connecting to threaded galvanized rigid steel conduit.
2010-11-01 BMS Version
Section 26 04 10
Underground Service and
Service Entrance
Page 4
Plan No:
Project ID:
SPEC NOTE: Delete sand backfill if concrete encasement is used.
.3
Backfill with sand to 100 mm over cable.
SPEC NOTE: Delete following if concrete encasement is not required.
.4
Install drainage assembly. Band drainage assembly with 12 mm stainless steel straps to
conduit assembly to prevent mechanical displacement. [Extend drain pipe into [1000]
[ ] mm round and [3000] [ ] mm deep washed gravel sump] [mechanical drainage
system].
.5
Encase with [50] [75] mm thick concrete envelope.
3.4
CABLE IN UNDERGROUND DUCTBANK
.1
Install underground ductbank as specified in Section 26 05 43.
SPEC NOTE: If an underground ductbank is used for a service entrance, ensure that Section
26 05 43 is included.
END OF SECTION
2010-11-01 BMS Version