A contactor is a small device that controls the flow of electricity to one of your air conditioner's components. ... These devices are used to provide and cut off the supply of power to many of your air conditioner's components, including the compressor, the condenser and your system's various motors
The construction companies are divided into different types depending upon the type of job the companies perform. The role in the construction such as acquisition of land, design, financial planning, execution, operating, maintaining and paper works denotes the construction company type.