3 phase wiring a condenser. To operate any single phase equipment within a three phase system all thats required is to redirect one wire from any of the three phase lines to the piece of equipment. 3 phase high voltage air conditioning. That why two phases have 120v to neutral and the third is the high leg. I have spoken to 3 electricians.
Unlike single phase power 3 phase electric power relies on three wires. To better understand this setup you can consider it as an engine with three compartments and three pistons rotating around a crankshaft axis. Ray great question. Most commercial buildings use 3 phase power which uses four wires three live and one neutral in an alternating current circuit.
How to 3 phase condenser fan motor wiring dont forget to likecomment share subscribe. This is what i meant by 240v 3 phase delta service. One says that i need only change the 3 phase breaker to 3 separate 1 phase breakers and leave the 2 additional phases disconnected and unused in the ac connection. This includes where to install the high and low voltage wiring and why how to check the wiring on the capacitor and where the low voltage powering the contactor is coming from.
Since most oem motors only have 3 wires and most replacement condenser fan motors have 4 wires this creates a little confusion. The other two electricians say that there is no problem leaving the 3 phase breaker and just leaving the unused phases disconnected. David explains how to wire a 460 3 phase. Low power loads in this setup can rely on.
1 labeled h or herm of the compressor one labeled c or com for the common and 1 labeled f or fan for the fan motor. On a dual run capacitor there are 3 terminals. Tool list https. Any two phases of such a service will still yield 240v to each other but the high leg will yield 200 volts to groundneutral.
All of them agree that there is no worry about the shared neutral.