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The method of comparing voltage readings at the source and the electric strike connection is the appropriate approach to check for a line drop in an electric strike system. This technique allows a technician to determine if there is any significant loss of voltage along the wiring that could indicate resistance or a fault in the circuit.

When there is a voltage drop, it may suggest issues such as inadequate wire gauge, loose connections, or excessive length of wire run, which can hinder the performance of the electric strike. By measuring the voltage directly at the source and then again at the electric strike, a comparison can reveal any discrepancies that could be affecting the system’s functionality.

While measuring temperature changes, analyzing current flow, or inspecting wiring for physical damage are important tasks in troubleshooting electrical systems, they do not specifically address the issue of voltage drop as effectively as comparing voltage readings does. Each of these other methods can provide valuable insights but will not pinpoint whether the issue lies specifically with the voltage drop in connection to the electric strike.