Appendix 5 24VAC Wire Gauge & Transmission Distance
The following table describes the maximum distance of each different wire gauge when the loss rate
of 24VAC voltage is less than 10%. For an AC driven device, the maximum voltage loss rate is 10%
allowable. For example, for a device with the rating power of 80VAC which is installed at a distance
of 35 feet (10m) away from the transformer, then 0.8000mm is required as the minimum wire
gauge.