How to Wire a Contactor: 8 Steps (with Pictures) - wikiHow METHODWARNINGSTHINGS NEEDED Acquire the contactor. Make sure that the contacts of the contactor are rated in both voltage and current to handle the expected load that will be required by the equipment being powered. Contactors are available from building and construction supply stores, as well as some larger hardware stores.Study the contactor manufacturer information. The manufacturer information will identify the 2 input pins for 120 volts AC control. The may be 2 or more sets of output contacts identified. These contacSee all 8 steps on wwwhowViews: 251K Videos of contactor wiring hvac Click to view on YouTube4:27HVAC Solving contactor issues with a relay78K viewsYouTube · Click to view on YouTube0:42HVAC Contactor Tech Tip1 viewsYouTube · 4/30/2017Click to view on YouTube12:35Air conditioner contactor wiring,Connection || Fully4World60K viewsYouTube · 7/12/2018See more videos of contactor wiring hvac Wiring an Outdoor Condenser!: What each of the Wires is Click to view on Bing4:25Apr 20, 2016Wiring an Outdoor Condenser!: What each of the Wires is For, How it Works! and where the low voltage powering the contactor is coming from. Straight Cool Air Conditioning Condensing UnitAuthor: AC Service Tech LLCViews: 132K How to Wire a Contactor With a 120 Volt Coil | Hunker In other words, a 120 volt alternating current (commonly referred to as a 120 VAC) is wired to the coil of the contactor. The contactor then uses the set of conductive discs, the contacts, to supply a 240 VAC power source to something like an air conditioner unit or an air compressor.