What type of load can a transformer with a 120/240-volt secondary be connected to?

A transformer with a 120/240-volt secondary is specifically designed to supply single-phase power. This type of transformer typically has one primary winding and one secondary winding, which is suitable for connecting to electrical loads that require single-phase voltage. Common applications for this voltage configuration include residential electrical service where appliances and lighting circuits operate on single-phase power.

While three-phase loads and multi-phase loads can be powered by transformers designed for such configurations, a standard 120/240-volt transformer does not provide the necessary voltage and phase relationships for these types of loads. Therefore, connecting a three-phase load to a 120/240-volt transformer would not be effective or safe without the appropriate transformer setup designed for three-phase systems. Thus, the most appropriate answer regarding the type of load that can be connected to a 120/240-volt secondary transformer is indeed single-phase load.