When replacing an existing dryer or electric range, what does the NEC allow regarding the grounded conductor?

The National Electrical Code (NEC) permits the reuse of the grounded conductor when replacing an existing dryer or electric range under specific conditions. This means that the grounded conductor can be utilized for grounding the appliance frame, provided that it meets the necessary requirements for safety and compliance.

This allowance is primarily based on the understanding that many existing installations were designed with a grounded conductor which adequately served the purpose of grounding in those scenarios. However, it's important to ensure that the conductor being reused is in good condition and appropriately sized for the electrical load of the new appliance.

Using the grounded conductor for grounding can promote ease of installation and reduce unnecessary complexity in the connections, provided the existing system adheres to current safety standards. It is crucial to check local codes and any amendments to the NEC that may apply, as they can vary based on jurisdiction.

In summary, this provision reflects a balance between maintaining safety and enhancing practicality in residential wiring practices when replacing appliances.