Wire Type and Sizing Considerations | HVAC Technical Wire Type and Sizing Considerations - When a professional electrician looks at a job to wire a house or a new circuit in any structure the primary consideration in the wiring job is the size and type of wire to be used for the job per the NEC. The same for a plumber when looking at a job the plumber will size the pipes based on the number of AC - Wire - Electrical - The Home Depot Shop our selection of AC, Wire in the Electrical Department at The Home Depot.Cable/Wire Type: AC How to Size Wire for a Central Air Conditioner | eHow Use the nameplate data from step 1 above to find the correct size wire to conduct power to the central air conditioning unit. Table 310-16 shows that three wires of 6-gauge placed in a conduit will safely conduct 65 amperes of power. The voltage range for this wire falls between 0 volts and 2,000 volts. Wire gauge size chart | AWG table - RAPID TABLES American wire gauge size calculator and chart. Wire gauge calculations Wire diameter calculations. The n gauge wire diameter d n in inches (in) is equal to 0n times 92 raised to the power of 36 minus gauge number n, divided by 39:. d n (in) = 0 in × 92 (36-n)/39. The n gauge wire diameter d n in millimeters (mm) is equal to 0m times 92 raised to the power of 36 minus gauge Wire Size Calculator The wire size calculator will give you a very simple and quick solution to the problem of calculating the size of wires and cables for pump applications in golf courses, landscape projects, and agriculture. The requirements of the National Electrical Code (NEC) and local codes must always be followed. The importance of thermostat wire gauge? - hvac-talk Apr 10, 2007Hi everyone, I'm looking into installing a Honeywell VisionPro IAQ thermostat and its control unit (part no. YTH9421C1002) in an existing home. The wiring installation instructions for the thermostat say to use 18 guage wire. However, there's only 20 gauge wire in the wall from the furnace to the existing thermostat. It's not trivial to change. What gauge wire to use for an air conditioner - answers What gauge wire to use for an air conditioner? For USA, Canada and countries running a 60 Hz supply service. 10-2 wiring is good for up to a 30 Amp 240 volt Air Conditioning (AC) unit.