What overcurrent protection rating is permissible for class 2 transformers?

Class 2 transformers are designed with specific safety and performance standards in mind. The permissible overcurrent protection rating for Class 2 transformers is limited to 20 amperes to ensure that the transformer can operate safely within its design specifications. This limitation is rooted in the National Electrical Code (NEC), which aims to prevent excessive current flow that could lead to overheating or damage to the transformer and connected circuits.

Keeping the overcurrent protection at 20 amperes helps to ensure that the transformer won't be subjected to conditions that could exceed its capacity, maintaining efficiency and safety. Therefore, for Class 2 transformers, a maximum overcurrent protection of 20 amperes aligns with the NEC regulations, designed to provide safety and reliability in electrical systems.