Current transformer metering is often installed on the meter pole when service size exceeds which of the following?

Current transformer metering is commonly implemented for individual service sizes exceeding 200 amperes. This practice is adopted because when the demand for electrical service becomes high, it requires more advanced equipment for accurate metering and safety. A current transformer (CT) allows for the measurement of the electrical current flowing through a conductor without direct electrical connections, providing a safer and more manageable way to monitor large amounts of electrical current.

Additionally, using current transformers for service sizes over 200 amperes also ensures that utility providers can effectively manage and measure the consumption of electricity, maintaining accurate billing and operational efficiency. In contrast, for lower service sizes, standard metering is usually adequate and doesn't necessitate the added complexity and cost of current transformers.