What is the most common service found at a Company switch in North America?

The most common service found at a Company switch in North America is 120/208v 3-phase. This voltage configuration is widely utilized in commercial and industrial settings because it provides a good balance of power and efficiency. The 120/208v 3-phase system is popular due to its ability to supply power to a variety of equipment, including lighting, HVAC systems, and other machinery.

In a 120/208v 3-phase system, the 120 volts is derived from any two of the three hot conductors, allowing for a 120v supply for smaller appliances and lighting. The three-phase system enables smoother operation and lower electrical losses, which can lead to increased system efficiency. This configuration is particularly beneficial in settings that require substantial electrical loads.

While other options listed may be used in certain residential or specialty applications, 120/208v 3-phase is the standard in most commercial environments, making it the most prevalent choice at company switches.