To solve 3-phase voltage notching problems, use a 3% impedance reactor. When silicon-controlled rectifiers (SCRs) are used in electrical controls, we frequently experience line voltage distortion in ...

All questions and answers are based on the 2011 NEC. Q. What kind of marking does the Code require to identify the high-leg of a 3-phase, 4-wire delta connected system? A. On a 4-wire, delta-connected ...