1) Current Capacity: 12 AWG pure copper wire is rated for a current capacity of approximately 20 amps (A), but actual capacity may vary depending on the specific transformer design and application requirements. When selecting wire gauge, it is important to ensure that it is large enough to meet the required current transfer requirements, taking into account coil heat and power loss.

2) Wire Gauge and Diameter: 12 AWG pure copper wire has a diameter of approximately 2.05 mm (0.081 inch). The larger the diameter of the wire, the lower the resistance and the more current it can carry. When designing a transformer, it is necessary to select the proper wire diameter for the current and power required.


3) Insulation: In order to ensure the safe operation of the windings, the 12 AWG pure copper wire must be insulated with a suitable insulating material. The most common insulating materials are polyamide acid ester varnish, polyimide varnish and so on. The choice of insulation materials should be based on the transformer's operating temperature, insulation strength requirements and environmental conditions.

(4) Winding structure: the winding of toroidal transformer is generally composed of main winding and secondary winding. The main winding is used to transmit power or load current, and the secondary winding is used to provide auxiliary power or realize transformer feedback control. Depending on the specific transformer design and application requirements, 12 AWG pure copper wire may be used in the primary winding, secondary winding, or both.

5) INSULATION SYSTEM: The insulation system is an important part of the transformer windings and consists of insulation between the windings and between the windings and earth. The insulation system must be designed in accordance with current electrical safety standards and codes to ensure electrical insulation between the windings and between the windings and the outside world.

6) COIL ARRANGEMENT AND CONNECTION: When arranging 12 AWG pure copper wire coils, consideration must be given to the way the coils are arranged and connected. The correct winding sequence and insulation requirements must be followed when arranging the windings to ensure the electrical performance and reliability of the coils.

It should be noted that the design and manufacture of toroidal transformers is a complex process involving a variety of factors. Therefore, it is recommended that you seek the advice of a professional electrical engineer and adhere to applicable design standards and codes when designing and manufacturing your toroidal transformer to ensure performance and safety.