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^ In the U.S., a green/yellow striped wire may indicate an isolated ground.[citation needed] In most countries today, green/yellow striped wire may only be used for protective earth (safety ground) and may never be unconnected or used for any other purpose. This method of running three-phase equipment is commonly attempted with motor loads though it only supplies 2/3 power and can cause the motor loads to run hot and in some cases overheat. Wye[edit]. Exception Details: . I 1 + I 2 + I 3 = I N = 0. Another method often attempted is with a device referred to as a static phase converter. Retrieved 24 November 2012. It is common practice in many regions to identify 120/208 (wye) conductors as black, red, and blue, and 277/480 (wye or delta) conductors as brown, orange, yellow. Single-phase 100 V supplies (180 degrees "out of phase") would be obtained between either L1 or L2 and the neutral (N). The voltage between line conductors is 3 times the phase conductor to neutral voltage:[14].

{displaystyle V{3}=V{text{LN}}angle {+120}^{circ }.} . ^ In Canada the high leg conductor in a high-leg delta system is always marked red. Devices that utilize rectifier-capacitor front-end such as switch-mode power supplies, computers, office equipment and such produce third-order harmonics that are in-phase on all the supply phases. See also[edit]. pp.6068. {displaystyle {begin{aligned}V{12}&=V{1}-V{2}=(V{text{LN}}angle 0^{circ })-(V{text{LN}}angle {-120}^{circ })&={sqrt {3}}V{text{LN}}angle 30^{circ }={sqrt {3}}V{1}angle (phi {V{1}}+30^{circ }),V{23}&=V{2}-V{3}=(V{text{LN}}angle {-120}^{circ })-(V{text{LN}}angle 120^{circ })&={sqrt {3}}V{text{LN}}angle {-90}^{circ }={sqrt {3}}V{2}angle (phi {V{2}}+30^{circ }),V{31}&=V{3}-V{1}=(V{text{LN}}angle 120^{circ })-(V{text{LN}}angle 0^{circ })&={sqrt {3}}V{text{LN}}angle 150^{circ }={sqrt {3}}V{3}angle (phi {V{3}}+30^{circ }).end{aligned}}} . Wiring for the three phases is typically identified by color codes which vary by country.

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