TYPES OF AC POWER SOURCE
AC Input power to the IC Series can be supplied from a split-phase or dual-input single phase AC source. These sources typically include utility power or a generator.
• Split Phase: This source has 4 lines: 2 Hot Lines, one neutral and one ground. The 2 hot lines are 120VAC and are 180 degrees out of phase with each other, so that the 2 voltages equal 240VAC. The voltage between each hot line and neutral is 120VAC and the voltage between the neutral and ground is approximately zero. Because the 2 lines are out of phase, the currents from each line subtract in the neutral, and the neutral current will be approximately zero if the loads on each line are equal. For example, if Hot 1 is supplying 20A and Hot 2 is supplying 15A, the current in the neutral will be 5A.
• Dual Input: This source has 4 lines: 2 Hot lines, one neutral and one ground. The 2 Hot Lines are 120VAC and are in phase and must come from the same source. The voltage between the 2 hot lines is zero. The voltage between each hot line and the neutral is 120VAC and the voltage between the neutral and the ground is approximately zero. Because the 2 lines are in phase, the currents from each line add together in the neutral. For example, if Hot 1 is supplying 20A and Hot 2 is supplying 15A, the current in the neutral will be 35A.