When troubleshooting a completed installation your first meter reading should be taken where?

When troubleshooting a completed installation, the first meter reading should be taken at the point of service or the main electrical panel. This ensures that you capture the total incoming power and identify any potential issues at the source. Additionally, readings at key downstream locations, such as circuit breakers or outlets, can help isolate problems further along the system. Always ensure safety precautions are followed during this process.