What is a possible consequence of running different voltage circuits in the same conduit?

Running different voltage circuits in the same conduit can lead to various issues, but a significant consequence is a code violation. Electrical codes, such as the National Electrical Code (NEC) in the United States, set specific guidelines regarding the types of conductors that can be installed in the same conduit. This is mainly for safety reasons, including ensuring proper insulation, preventing overheating, and reducing the risk of electrical fires.

When circuits of different voltages share a conduit, it can create a situation where the lowest insulation rating of the conductors may not adequately protect against potential faults or other electrical issues. This can also lead to cross-talk or interference, where signals from one circuit affect another, resulting in performance issues.

Although there may be reduced voltage or increased electrical noise under certain conditions, the most critical concern is compliance with electrical codes, making the code violation the most definitive consequence in this scenario.