Commercial electricians are typically responsible for a wide variety of projects in both residential and commercial settings. These projects range from basic electrical wiring and maintenance tasks to complex design, installation, and repair jobs, including HVAC, fire alarm systems and data networks. 

Basic Electrical Repairs: Commercial electricians work on small-scale repairs such as replacing wiring or sockets or installing new outlets or switches. They may also install dimmer switches for lighting systems, programmable thermostats for temperature control, and motion-sensing devices for security purposes. Additionally, they may be called upon to repair damage caused by storms, pests, or vandalism. 

HVAC: Commercial electricians often get involved in the installation of heating, ventilation, and air conditioning (HVAC) systems. This consists of setting up the complex network of wires that connects all the components in the system together — from furnaces to air handlers to ducting — and connecting them to other electrical equipment such as circuit breakers and receptacles. 

Fire Alarm Systems: Fire alarm systems are another critical component of electrical work that commercial electricians often install in commercial buildings. They usually do this with the help of a particular technician known as a fire alarm installer, who works alongside the electrician to ensure everything is wired correctly according to code. The fire alarm installer will inspect the building’s existing wiring system before designing a customized plan according to local codes and regulations. Once this is done, the commercial electrician can install components such as smoke detectors, heat detectors, and manual pull stations to complete the system. 

Data Networks: Data networks are becoming increasingly common in businesses today due to their ability to improve communication between employees and offer secure access to information from anywhere in the world. Setting up these networks requires more than just plugging cables into each device; it also requires running extensive wires throughout the building space for everything to be connected properly. Since most businesses don’t have internal IT staffs that specialize in these types of installations, hiring an experienced commercial electrician is often necessary to successfully implement these systems. 

In addition to all of these project types listed above, commercial electricians may also be called upon for maintenance purposes such as inspecting wiring systems for signs of wear or corrosion that could indicate potential danger spots; performing routine tests on outlets; testing surge protectors; ensuring proper grounding of circuits; performing spot checks on appliances; troubleshooting problems when they arise; and implementing preventative measures against future issues like a rodent infestation or other sources of damage or destruction that could potentially cause harm if left unchecked over time.