What percentage of transformers installed in North America are single-phase transformers for a 120/240-volt service?

Single-phase transformers are commonly used in residential and light commercial applications, especially for 120/240-volt services, which are typical for homes. The percentage of transformers installed in North America being single-phase reflects the demand for simplified electrical systems that cater to lower-power consumption typical in residential settings.

The chosen answer indicates that 90% of transformers installed for this service are single-phase, which aligns with industry standards and practices where most residential wiring utilizes single-phase systems. This high percentage can be attributed to the prevalence of 120/240-volt configurations, which are efficient for the majority of home electrical appliances and systems.

The lower options suggest an underestimation of single-phase transformer use, which does not accurately represent the actual market trends and data. The significant reliance on single-phase transformers supports the assertion that they constitute a major portion of the transformer installations in North America, further validating the correctness of the stated percentage. Understanding these statistics is crucial for professionals in the field, as it informs decisions about transformer selection and application in various projects.