Built to spec
Built to your engineered drawings, survey, and the real site conditions, not a one-size-fits-all approach forced to fit.
Commercial & Heavy-Civil Construction
Electrical Duct Bank and Underground Conduit
Build coordinated underground power and communications pathways with verified geometry, protection, and pull readiness for developers, utilities, institutions, industrial operators, and general contractors.
- Licensed, Insured & WSIB-Covered
- 20 Years in Business
Get a Quote
Tell us what you need and we’ll get you a quote. Licensed, insured & WSIB-covered · Free, no-obligation quote & on-site assessment.
Get a Quote
Licensed, insured & WSIB-covered · Free, no-obligation quote & on-site assessment.
20 Years in Business
Licensed, Insured & WSIB-Covered Completed to code & Ontario requirements Completed on site and built to the drawings Performed & installed on site across Ontario
Why Harrowgate Group
What to expect from electrical duct bank and underground conduit
Made to last
Durable materials and methods chosen for the load, traffic, and environment on site.
Quote-ready
Send specs, drawings, or photos and get a free, no-obligation site visit and estimate with no guesswork.
Code-conscious
Installation and site work completed in accordance with Ontario requirements.
Our Process
How we plan and deliver electrical duct bank and underground conduit
Electrical duct banks and underground conduits provide protected, planned pathways for power, controls, communications, and site systems below roads, yards, buildings, and landscaped areas. Harrowgate performs excavation, conduit assembly, concrete encasement, structures, grounding interfaces, backfill, testing, and restoration.
- 01 Send your inquiry, a few photos or a description of the site.
- 02 We come out, assess the site, take measurements, and confirm the scope.
- 03 We complete the electrical duct bank and underground conduit on site, to the load and finish the job needs.
- 04 We install it, finish to grade, and clean up, one accountable crew, start to finish.
Local Context
A closer look at electrical duct bank and underground conduit
Scope
Understanding electrical duct bank and underground conduit
Which electrical duct bank and underground conduit method fits the condition?
Concrete-encased duct banks protect grouped power or communications conduits under roads, yards, and constrained corridors. Direct-buried conduit reduces concrete where loading, utility-owner criteria, and future work permit it. Steel, PVC, HDPE, fibreglass, and specialty conduits provide different stiffness, joining, fire, corrosion, pulling, and bend characteristics. Directional drilling or casing can cross obstacles, while open cut provides direct control of spacers, reinforcement, encasement, chambers, grounding, and grade. Electrical and utility design selects the system.
How We Deliver Electrical Duct Bank and Underground Conduit
Step 1,
Step 2, We coordinate the electrical, civil, structural, utility, and landscape drawings before ground disturbance. Survey layout fixes the route, bends, elevations, crossings, maintenance holes, handholes, transformer bases, and building entries. Existing services are located and daylighted, then trenches are excavated with the required support and groundwater control. The base is trimmed and prepared, spacers are set at the specified interval, and conduits are assembled with joints staggered and bends held to the cable design.
Reinforcing, grounding components, stub-ups, sleeves, and structure connections are installed before concrete. We inspect the full run, cap open ends, place concrete without floating or displacing conduits, and maintain cover and separation. After curing, each conduit is cleaned, mandrel tested, roped, sealed, identified, and recorded. Harrowgate completes granular backfill, density testing, markers, warning systems, and surface restoration.
Step 3, Before concrete, a hold-point check records the duct array, spacer intervals, reinforcing, cover, bends, stub-ups, grounding components, and structure connections. During placement, the crew watches for buoyancy and displacement. After cure, testing proceeds duct by duct, so a blockage is located and corrected before cable crews mobilize.
Step 4, Harrowgate releases the duct bank after conduit proofing and identification, accepted concrete and chambers, grounding, survey, backfill, compaction, restored surfaces, and complete cable-pulling access.
Step 5, Harrowgate releases the duct bank after conduit proofing and identification, accepted concrete and chambers, grounding, survey, backfill, compaction, restored surfaces, and complete cable-pulling access.
Which materials and Ontario standards apply?
Duct banks follow issued electrical, civil, structural, utility-owner, grounding, chamber, and fire-separation design, CSA requirements, OPSS where specified, and applicable local municipal requirements.
Conduit, fittings, spacers, reinforcement, concrete, grounding, markers, chambers, covers, drains, seals, and identification follow approved submittals and service requirements. The 2024 Ontario Building Code applies where building entries and fire separations fall within its scope.
Concrete follows CSA A23.1 and CSA A23.2 where applicable, with structural design to CSA A23.3. Excavation, utility, and electrical work follows the accepted safety and authority procedures.
Acceptance includes pre-pour inspection, concrete records, mandrel and proofing, cleaning, ropes, caps, tags, grounding, chambers, survey, compaction, restoration, and release for cable installation.
Planning electrical duct bank and underground conduit? Talk it through with our team.
What Goes Wrong, and How We Prevent It
The most expensive duct-bank defect is often discovered when cable pulling starts. Harrowgate prevents blocked, crushed, misrouted, flooded, or over-bent ducts through clean handling, restrained geometry, monitored concrete placement, end protection, mandrel testing, and as-built control before the trench is restored.
Common failures include reversed or excessive bends, crushed ducts, concrete intrusion, floated conduit, blocked runs, missing grounding interfaces, poor structure connections, low cover, water entry, unrecorded deviations, and settlement at road crossings. Harrowgate prevents them through coordinated layout, rigid spacer assemblies, capped ducts, controlled concrete placement, and inspection before cover.
We measure sweeps and elevations against the cable-pulling plan, keep conduits clean during every shift, and mandrel each completed run. Structures are set on prepared bases and matched to final grade. Backfill proceeds only after test acceptance. Surveyed redlines capture route, depth, crossings, structures, and stub-ups while they remain visible.
Stub-ups and structure entries receive separate checks because small angular or positional errors create unusable terminations. We brace them against concrete pressure, verify projection and orientation, and protect them through backfill and surface work. Damaged ends are repaired to the accepted system before conductors or equipment are installed.
Have drawings for electrical duct bank and underground conduit? Send them over and we will scope it.
FAQ
Electrical Duct Bank and Underground Conduit FAQ
What is included in an electrical duct bank scope?
The scope includes route coordination, survey layout, utility locates, excavation, trench support, base preparation, conduit and spacers, reinforcing, grounding interfaces, concrete encasement, maintenance holes or handholes, mandrel testing, pull rope, plugs, labels, backfill, density testing, as-builts, and restoration. Harrowgate prices the issued electrical and civil design.
Why are some underground conduits concrete encased?
Concrete encasement holds the conduit array in its designed geometry and provides mechanical protection where loading, crossings, utility requirements, or system importance demand it. The electrical design establishes concrete cover, strength, reinforcing, and duct separation. Harrowgate builds and inspects the bank to those dimensions before any portion is concealed.
How do you confirm conduits are ready for cable pulling?
After the bank has cured and structures are complete, Harrowgate cleans each duct, passes the specified mandrel, installs the required pull rope, verifies identification, and seals the ends. Failed runs are investigated and corrected before handover. Test records link every conduit to its origin, destination, size, and intended service.
What controls conduit movement during concrete placement?
Harrowgate uses the specified spacers, secure supports, staged assembly, restrained stub-ups, controlled discharge, and placement methods that limit buoyancy and impact. Workers observe the array while concrete is placed. Cover, separation, bends, and entry positions are checked at hold points, and any movement is corrected before the concrete reaches final set.
Can duct banks cross active roads and yards?
Yes. Harrowgate stages excavation, traffic, access, trench support, temporary plating where designed, concrete placement, cure time, backfill, and pavement restoration around operating constraints. The crossing design accounts for loading and cover. We coordinate shutdowns and access windows with the owner and maintain the approved route through the work zone.
What information is needed for a duct bank quote?
Provide electrical and civil plans, duct schedules, sections, structure details, utility standards, concrete and reinforcing requirements, grounding details, inspection requirements, geotechnical information, route constraints, traffic staging, restoration limits, and schedule. Harrowgate checks quantities and interfaces instead of pricing conduit length without the supporting civil work.
Why are spacers used in a concrete duct bank?
Spacers maintain designed conduit separation, rows, cover, and alignment during assembly and concrete placement. Without adequate restraint, ducts can float, spread, or touch, affecting encasement, heat, pulling, and structural performance.
What does mandrelling an underground conduit verify?
A correctly sized mandrel checks that the duct is continuous and has not been crushed, deformed, offset, or obstructed. Swabbing and rodding remove debris and confirm the path before pull rope and cable installation.
Still have a question about electrical duct bank and underground conduit? Ask our team directly.
Our Work
View Our Projects See real projects across Toronto & Ontario
Commercial and heavy-civil construction delivered for developers, contractors, property managers, and municipalities.
Get a quote for electrical duct bank and underground conduit
Send drawings, a site plan, or a description of the scope. Harrowgate Group is licensed, insured, and WSIB-covered.
Licensed, Insured & WSIB-Covered, work managed and documented on every job
Send your project details
Tell us what you need and we’ll get you a quote. Licensed, insured & WSIB-covered · Free, no-obligation quote & on-site assessment.
Electrical Duct Bank and Underground Conduit Across the GTA
View all service areas →Harrowgate Group provides electrical duct bank and underground conduit, delivered and installed with quote-ready support across Toronto and surrounding Ontario communities.
