Also, use the Orange color for high leg delta hot busbar (now phase “C”, previously Phase “B” – prior NEC-2008″. Good to know: Other names used for High Leg Delta: Wild Leg, High Leg, Power Leg, Dog Leg, Orange Leg, Red Leg, Stinger Leg, Bustard Leg. The overall wires enters to the commercial panel in still three hot including high leg delta and one neutral wire. In Open-Delta, two hot wires and one neutral wire comes from the large transformer and one hot wire as a high leg delta comes from the smaller transformer.In the delta secondary, each hot connects to two separate transformers. In Wye-Delta, The three phases or hot wires plus a center tapped neutral comes from the transformer.120V, 208V and 240V.įor high leg delta power, the electric power providers install three transformers Wye-Delta or Delta-Delta (we will discuss Wye-Delta for this tutorial due to 120V, 208V and 240V, 1 & 3 Phase Supply) or two transformers in Open delta configuration for smaller loads which still needs three phase power supply. The main advantages of the high leg delta system is that there are three types of available voltage i.e. High Leg Delta (also known as Power Leg or Wild Leg) is a three phase, four wire power distribution system used in commercial buildings in North America especially in rural and older installations. Wiring Color Codes for High Leg Delta Panel:.How to Wire 240V, 3-Phase Circuits & Breakers?.How to Wire 240V, 1-Phase Circuits & Breakers?.How to Wire High Leg Delta, 208V, 1-Phase Circuits & Breakers?.
How to Wire 120V, 1-Phase Circuits & Breakers?.
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