The 24v transformer specifically converts 120v or 240v AC to a lower 24v AC, which is commonly used to power heating and cooling systems, doorbells, thermostats, and security systems. Now, let's delve into the wiring diagram for a 24v transformer.. The AT20, AT40, AT72, AT87 and AT88 TRADELINE® Transformers are step-down transformers used primarily for powering 24 Vac control systems. They can be used in any 24 Vac application that does not exceed the transformer volt-ampere (VA) rating.
The TRADELINE® Transformers will replace all equivalent Honeywell and competitive transformers with similar primary voltage requirements, equal or smaller VA ratings and similar mounting configurations. Transformer voltage ratings (primary and secondary), wiring connection type, and fusing are listed in Table 1.. THESE TRANSFORMERS ARE USED FOR POWERING 24 VOLT SYSTEMS. AT20,40,72 are designed to power ther mostats, gas valves and relays. -Meet "NEC Class 2 not wet, Class 3 wet" and U.L. 1585 requirements. -Color-coded leadwires for primary connections. -Color-coded leadwires or screw term inals for secondary connections.
