Most modern 200-amp electrical meters are marked _______.

The designation for most modern 200-amp electrical meters being marked as 200 CL reflects an important standard in the electrical industry. The "CL" signifies that the meter complies with the applicable standards set by testing organizations, which is essential for ensuring safety and reliability in electrical installations. The "200" indicates the amperage rating of the meter, confirming that it can handle loads up to 200 amps.

Understanding these markings is crucial during an electrical inspection, as they indicate whether the meter is appropriate for the service requirements of the dwelling. Meters that are not marked properly or that do not meet the required standards can pose issues regarding functionality and safety.

Other options like "100 SEC", "200 UL", and "100 CL" do not accurately reflect the standard for 200-amp meters. For instance, "100 SEC" suggests a 100-amp capacity and does not relate to modern 200-amp installations. Similarly, "200 UL" might imply a certification but not the specific amperage, while "100 CL" also references a lower amperage rating. Therefore, the correct marking reinforces the need for compliance with safety and operational standards in residential electrical systems.