There are generally three main types of electrical contractors: Inside Electrical Contractors, Outside or Line Electrical Contractors, and Integrated Building Systems (IBS) Contractors. Inside Electrical Contractors focus on electrical systems within buildings, such as wiring, lighting, and power distribution. Outside or Line Electrical Contractors work on high-voltage power transmission and distribution systems, such as power lines, wires and substations. IBS Contractors specialize in low-voltage systems, including data cabling, security systems, and smart technology integration. Each type has a specific focus and expertise, providing different services based on project requirements.