The “Delta” and “WYE” names are specific indicators to the shapes that the wires resemble once connected to each other. “Delta” comes from the Greek symbol “Δ”, while “WYE” resembles the letter “Y” and is also known as the “star” circuit. Both, Delta and WYE configurations have the flexibility to deliver power over three wires, but the principal differences between the two are based on the number of wires available within each configuration and the current flow. The WYE configuration has gained popularity in recent years because it carries a neutral wire that allows both line-to-neutral (single-phase) and line-to-line (2/3 phase) connections.