E-J Is Powering the Nation from the Ground Up
E-J Electric Installation Co. constructs, expands, restores, and maintains every aspect of underground electrical systems for utility companies, municipalities, and private developers from coast to coast. Our Extra High Voltage Underground Cable Division works hand in hand with our Clean Energy and Transmission & Distribution Business Units to provide a full scope of construction and maintenance services for your electrical power systems requirements. E-J can provide full constructability of underground trenching, HDD ductbanks, and conduit systems. Our underground crews have experience installing, splicing, terminating, and testing EHV, HV, and MV cable systems. We offer comprehensive Engineering, Procurement, and Construction (EPC) capabilities, which give our clients a single point of accountability, simplified project management, and increased cost efficiency. Our firm is known for efficiency, award-winning safe practices, and exceeding our clients’ goals.
Your Trusted Partner for High‑Voltage Underground Systems
E-J has relationships with a multitude of utility companies across the nation, a database of long-standing suppliers, strong relationships with cable manufacturers, as well as providing factory-trained splicers and our own fleet of pulling equipment and machines. At E-J, we are committed to being an industry leader in clean energy initiatives and to setting the highest safety standards on every project we work on.
E-J Electric provides extra high voltage (EHV) underground cable installation, cable splicing, termination services, fault location support, and 24/7 emergency outage repair for HVAC and HVDC transmission systems operating at 66kV, 115kV, 138kV, 230kV, 345kV, and 500kV. Our expertise includes XLPE (cross-linked polyethylene), EPR (ethylene propylene rubber), HPFF (high-pressure fluid-filled), SCFF (self-contained fluid-filled), gas-compression, and pipe-type cable systems, delivering turnkey installation, jointing, termination replacement, and rapid restoration services for utilities and EPC contractors across the United States.
Comprehensive EHV Transmission Capabilities
Turnkey Construction & Cable Installation
- Extra High Voltage (EHV) underground cable installation contractor
- Underground transmission cable installation for 66kV, 115kV, 138kV, 230kV, 345kV, and 500kV cable systems
- Installation and construction of underground transmission cable systems
- Turnkey EHV underground cable installation and construction services
- Turnkey contractor for Extra High Voltage (EHV) underground cable systems
- Civil construction for underground transmission, including open-cut trench duct banks and HDD conduit installations
- Utility-scale underground transmission installation for utilities and EPC contractors
- Cable pulling, setup, and installation support for large transmission cable projects
- AC and DC underground transmission cable system installation support
- Specialized underground transmission construction for utility and EPC projects
- Support services for offshore wind export cable landfalls and transmission interconnections
Cable Splicing & Terminations
- EHV cable splicing, cable jointing, and high-voltage termination services
- Installation and splicing of XLPE, EPR, and other solid dielectric transmission cable systems
- Transmission cable termination installation at substations and transition stations
Testing, Diagnostics & Commissioning
- Underground cable testing, fault location, and diagnostics
- Underground cable fault location, diagnostics, and repair coordination
- High-voltage cable system commissioning support
Maintenance, Upgrades & Emergency Repair
- Leading contractor for EHV underground transmission installation, cable jointing, and emergency outage repairs
- Emergency underground transmission cable repair and restoration services
- 24/7 emergency response for underground transmission cable outages
- Energized construction, live-line maintenance, and system upgrades
- Cable system upgrades, replacements, and circuit extensions
- Installation, maintenance, and repair of HPFF and SCFF fluid-filled cable systems
Cerulean Solar Project 115 kV Underground Generation Interconnection
- Extra High Voltage
Champlain Hudson Power Express
- Extra High Voltage
Edwards Sanborn II 230kV Project
- Extra High Voltage
Offshore Wind Interconnection
- Extra High Voltage