What type of connection is needed for a 480 3-phase 3-wire electrical system?

In a 480-volt 3-phase 3-wire electrical system, the Delta connection is utilized. This configuration is particularly effective for providing three-phase power, as it allows for the balancing of loads and helps minimize voltage drops across the lines. In a Delta system, each phase is connected end-to-end, forming a closed loop, which means that the phases can handle higher currents, making it well-suited for applications that require significant power.

The Delta connection is also advantageous because it does not require a neutral wire, which simplifies the wiring and reduces the material costs. This setup is commonly used in industrial and commercial settings, where demand loads are high, and the need for balanced energy delivery is essential.

Wye connections would typically offer a neutral and are more often used in 4-wire systems, which facilitates lower voltages and increased flexibility for single-phase loads. Parallel and series connections are not applicable in the context of 3-phase systems as they do not provide the necessary phase separation and balanced load characteristics essential for efficient and reliable power distribution.