Building Electrical Construction

Our electrical building construction division is the backbone of Carr & Duff. From the building’s utility service to the last receptacle or light fixture, Carr & Duff is able to install all aspects of low, medium and high voltage electrical systems for facility owners, engineers, general contractors and construction managers.

Whether it is new construction out of the ground, additions, renovations or upgrades – we are able to tackle all the electrical needs of the customer with safe, on schedule and at budget service. Contact us for further assistance for our design build, design assist and budgeting capabilities.

Some of the industries we serve:
  • Airports, Ports & Transportation
  • Cogeneration & LNG Plants
  • Commercial & Retail
  • Data Centers & Mission Critical Facilities
  • Educational & Institutional Campuses
  • Entertainment, Gaming & Hospitality
  • Hospitals, Healthcare & Pharmaceutical Facilities
  • Industrial & Refinery Facilities
  • Manufacturing & Distribution Centers
  • Mid & High Rise Commercial & Residential
  • Municipal & Public Safety Facilities
  • Oil & Gas
  • Water & Wastewater Facilities

Carr & Duff undertakes all scope of work with the same approach, whether the project is small, large or complex. We strive to integrate the newest technologies into our projects and provide our work force with all the necessary resources, tools and equipment. Our success is dependent on the customer’s satisfaction.

Additionally Carr & Duff understands the importance of sustainable construction techniques as well as green and renewable energy initiatives. We have been a part of numerous LEED certified projects, and aim to apply lean construction techniques to help produce less waste as well as create safer and more efficient work sites for our clients and workers.

Highway & Roadway Construction

Our construction team is well equipped for any highway, roadway or elevated structure construction need. From electronic and static message sign construction to streetscapes and computerized traffic control systems – we have the knowledge and experience to get the job done on any type of roadway, bridge or structure project. A partial list of our services we provide includes:

  • Adaptive Traffic Signal Systems
  • Bluetooth Wireless Readers
  • Computerized Traffic Control Systems
  • Dynamic Message Signs
  • Fiber Optic Installation
  • Highway & Municipal Camera Systems
  • In-pavement Traffic Loops
  • Intelligent Transportation Systems
  • Movable Bridge Systems
  • Pedestrian Walkway Lighting Systems
  • Radar & Warning Light Systems
  • Rectangular Rapid Flashing Beacons Systems
  • Red Light Camera Systems
  • Roadway Weather Information Systems
  • Sign Construction
  • Street Lighting Systems
  • Tolling Systems
  • Traffic Signals & Controls
  • Travel Time Systems
  • Video Detection System


Carr & Duff is a PennDOT, NJDot, DelDOT and City of Philadelphia approved contractor.

Additionally Carr & Duff provides 24/7 emergency service
[Read More] for traffic and lighting pole knock downs with replacement poles, signals, fixtures, cabinets and equipment in stock.

Lighting Systems

Carr & Duff’s management team and crews are experts when it comes to installing, repairing and assisting with the design of exterior and interior lighting systems. We are very familiar with traditional lighting applications as well as complex installations.

A partial list of our services we provide includes:


  • Aviation Lighting
  • Bridge & Structures Lighting
  • Decorative & Architectural Lighting Systems
  • Distribution Centers & Warehouse Lighting
  • FAA & Tower Lighting
  • High-Mast Lighting
  • Institutional Lighting
  • Interior & Commercial Fit-Out
  • LED New Installations & Retrofits
  • Navigational Lighting Systems
  • Parking Lot & Site Lighting
  • Railway Tunnels
  • Roadway & Highway Lighting Systems
  • Theatre Lighting & Controls
  • Sports & Entertainment Lighting Systems & Controls

Low Voltage & Specialty Systems

Carr & Duff has extensive knowledge of installing, maintaining, upgrading and repairing low voltage and specialty systems including, but not limited to the following:

  • Access Point Cabling
  • A/V Systems
  • Backbone Cabling
  • Building Automation Controls
  • Card Security Access Systems
  • Closed Circuit Television Systems
  • Fire Alarm Systems
  • Fiber Optic Cabling & Splicing
  • Flight Information Systems
  • Nurse Call Systems
  • Public Address Systems
  • SCADA Systems
  • Security Systems
  • Structured Cabling
  • Systems Integration

Maintenance, Repair & Inspection

Our maintenance division is well equipped with the knowledge, training and equipment for servicing any kind of electrical system. From transformers to motor control centers to switchgear and substations – we maintain, repair and inspect them all.

Utilizing the latest technology and training – we are prepared to test any electrical or mechanical system and provide detailed reports of customer owned equipment.

Our services offered but not limited to:


  • 24/7/365 Emergency Response
  • Circuit Breaker Testing & Maintenance
  • Cable Fault Locating & Repair Services
  • Dielectric Fluid Sampling & Analysis
  • Dust, Clean & Preventative Maintenance of Electrical Equipment
  • Engineering Assistance with Coordination & Short Circuit Studies
  • Generator Testing & Inspection
  • Infrared Thermography
  • Power Quality Load Testing & Analysis
  • Switchgear Maintenance, Repair & Inspection
  • Transformer Maintenance, Repair & Inspection

Medium Voltage Distribution Systems

Carr & Duff provides a wide range of medium voltage distribution system construction services for commercial, industrial, institutional, municipal and utility clients. Additionally we can provide customers with design build or design assist project support.

Our services offered but not limited to:


  • Aerial Distribution Line Construction
  • Cable Splicing & Termination
  • Design Built & Design Assist Services
  • Direct Bury & Boring Construction
  • Heavy Hauling, Warehousing & Rigging of Equipment
  • Riser & Buss Duct Systems
  • Substation Construction
  • Switchgear Installations
  • Transformer Installations
  • Underground Distribution Systems
  • Vaults, Manholes & Shelters Installations & Repairs

Overhead & Underground Distribution

Our utility construction division installs, maintains and repairs medium and high voltage electrical systems and apparatus. We construct, repair and maintain aerial and underground distribution lines for utilities, municipalities as well as commercial, institutional and industrial facilities.

Our services offered but not limited to:


  • 34kv Hot Stick Capabilities
  • Boring & Direct Bury Conduit Installations
  • Counterpoise Installation
  • Civil Construction Services
  • Emergency Service Restoration
  • Fiber Optic Services
  • Grounding Resistivity Testing
  • Line Construction, Rebuilds, Upgrade, Relocation & Inspections
  • Live Line Maintenance
  • Re-Conductoring
  • Secondary Services & Metering
  • System Reliability & Hardening Improvements

Overhead & Underground Transmission

Our utility construction division installs, maintains and repairs high voltage electrical systems and apparatus. We construct, repair and maintain aerial and underground transmission lines for utilities and transit agencies.

A partial list of our services we provide includes:


  • Aerial Transmission Line Construction
  • Energized Services (up to 69kv)
  • Foundation & Civil Construction Services
  • OPGW Installation
  • Monopole Installations
  • Structure Upgrades
  • Tower Erection, Reinforcement & Demolition

Solar Construction

Our renewables department installs and maintains solar array systems. We provide turnkey solutions to ground mount, canopy or roof mounted systems.

A partial list of our services we provide includes:


  • Canopy & Carport Mounted Systems
  • Civil Construction & Site Work Services
  • Ground Mount Systems
  • Maintenance & Inspection
  • Roof Mounted Systems
  • Utility Interconnection & Upgrades

Substation Construction

Our project managers, linemen and electricians are experienced in all aspects of both air-insulated and gas-insulated substation design, construction and maintenance. We have the necessary expertise to assemble, install and maintain all substation equipment – including power transformers, circuit breakers, protective relay systems, capacitors and load tap changers.

We can upgrade and retrofit existing facilities, as well as install state-of-the-art equipment at new facilities. We also have the capacity to commission clients’ new substations.

Our extensive capabilities in extending the life of electrical apparatus include power transformers, breakers, and capacitors. We can conduct protective device coordination studies to help clients review electrical systems and ensure that sophisticated and costly electrical equipment is protected. We also provide a range of maintenance and installation services for switchgear applications in industrial and commercial facilities.

Our services offered but not limited to:


  • Apparatus Installation, Maintenance & Testing
  • Battery Bank Installation, Testing & Maintenance
  • Buswork Installations, Upgrades & Demolition
  • Civil Construction & Site Work
  • Concrete & Drilled Pier Foundations
  • Control Panel Fabrication, Installation & Wiring
  • General Contractor & Project Management Services
  • Heavy Hauling & Warehousing
  • Project & Construction Management
  • Programmable Logic Controller Installation
  • Relay & Controls Wiring
  • Rigging of Equipment
  • Substation Construction, Rebuilds & Upgrades up to 138 kV
  • Substation Testing & Commissioning Services
  • Switchgear Maintenance, Replacement & Testing
  • Transformer Retro-Fit Retro-Fill Services

Transit Construction

Carr & Duff has an extensive background in completing complex mass transit construction projects. Carr & Duff provides a wide variety of electrical, communication and civil construction services for the all facets of the mass transportation industry.

A partial list of our services we provide includes:


  • Automatic Train Control Systems
  • Block Signaling
  • Catenary Systems
  • Civil Construction & Site Work Services
  • DC Power Rectifiers
  • Design Built & Design Assist
  • General Contractor & Project Management Services
  • Mainline & Yard Power Construction
  • Passenger Stations Construction
  • Rail Yard Facilities Construction
  • Signal Systems & Cabling
  • Traction Power Substations & Cabling
  • Wayside & Control Office Communication Systems

Wireless Communications

Our wireless communications division installs a variety of cellular site, cable antenna systems, as well as fiber optic cabling and testing. We work closely with the design and engineering aspects of all types of communication projects we are involved with. Our crews are capable and prepared to tackle any communications project including inspection, repair and decommissioning of cell sites.

Our services offered but not limited to:


  • Cellular Sites
  • Communications System Design & Engineering
  • DC Power Systems
  • Distributed Antenna Systems
  • Fiber Optic Backbone
  • Fiber Optic & Copper Horizontal Cabling
  • Fiber Optic Cable Termination & Testing
  • Microwave Installations
  • Public Safety Systems
  • Radiating Cable Antenna Systems
  • Tower Erection, Reinforcement & Demolition

Latest Safety News

Winslow Elementary School Storm Response

Winter 2017 was not as severe as winters past on the east coast but we still had our fair share of storms. Being well equipped with the equipment and manpower to get the job done is what makes us stand out during destructive storms. Our expertise was needed in upstate...

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Our Recent Safety Committee Discussions

Carr & Duff utilizes a Safety Committee made up of field and office personnel. The committee meets monthly to discuss and review issues or items that need to be addressed within the company. The committee is empowered to facilitate change when warranted to further...

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Philadelphia’s YouthBuilds Charter School

On November 16th, 2016 Carr & Duff’s Safety Department taught an “Electrical Safety in Construction” course at Philadelphia’s YouthBuilds Charter School. Carr & Duff’s Safety Director, Wayne Sottung taught the interested students about the importance of Safety...

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Recent Projects

Delivery Center (2020)

Carr & Duff was the electrical contractor for a fast track new 170,000sq/ft delivery center...

30th Street Station Passenger Information Display System (2020)

GBCA/NECA PDJ Award Winning Project Carr & Duff was selected as the prime contractor for the...

Citizens Bank Park Perimeter Hardening Project (2019)

Carr & Duff installed new electrical equipment and circuits for the exterior site security...

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