Here's why:
* Ideal Continuity: The ideal scenario for a continuity test is a reading of zero ohms. This signifies a perfect electrical connection with no resistance to the flow of current.
* Real-World Resistance: In reality, even new wiring will have some inherent resistance. This is due to the material of the wires, the connections (terminal blocks, wire nuts, etc.), and the overall length of the circuit.
* Acceptable Range: For most residential electrical systems, a continuity test reading of less than 5 ohms is typically considered acceptable. Readings above 5 ohms might indicate a potential problem, like a loose connection or corrosion.
Why 1 ohm is unrealistic:
* Measurement Limitations: Even the most precise multimeters have a certain level of internal resistance, which can affect the reading. Reaching a reading of 1 ohm or less would be extremely difficult, even with a perfect connection.
* Practical Applications: The goal of a continuity test is to detect major problems, not microscopic variations in resistance. Focusing on a reading of 1 ohm is not practical for troubleshooting electrical systems.
Important Note: Always consult your local electrical codes and best practices for specific guidelines on acceptable continuity readings.
In summary:
* Aim for a continuity reading as close to zero ohms as possible.
* A reading under 5 ohms is generally acceptable.
* A reading significantly above 5 ohms may indicate a problem.
* Don't get hung up on achieving a reading of 1 ohm or less – it's not a realistic or necessary goal.
