Published at Tuesday, March 26th, 2019 - 21:45:46 PM. wiring. By Valere Mahe.
It is also a problem for manufacturers when misunderstood equipment is returned under warranty with no defect, as well as for homeowners when they don’t get the performance they expect. ”A lot of manufacturers still have a big metal box and one terminal strip with 17, 18, or even 19 wires,” Porter said. His dual-fuel control has three strips – one for the furnace, one for the outdoor unit, and one for the indoor thermostat – and the wires are clearly identified, he said.
For wiring a single-phase motor, the most important objective is to distinguish the starting circuit from the main winding. These two circuits are isolated from one another electrically if the lead wires are separated and not in contact with each other. Initially, the ohmmeter can be used to determine which wire belongs to which circuit as well as checking continuity between leads. You should be able to isolate into two groups any leads which have continuity with one another. The starting circuit is likely to isolate to two leads, the running circuit may have two or more leads that show continuity. If the running circuit has more than two leads, you will need to determine how those leads are to be used for voltage or speed changes.
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