Which of the following statements is true regarding grounded conductors?

Grounded conductors are a key component in electrical systems, primarily used for safety and stability. The correct statement indicates that these conductors are connected to loads through various control devices, which is true because grounded conductors serve as a return path for electrical current. This helps in fault conditions by providing a way for excess current to safely dissipate, often through grounding equipment or coordination with circuit breakers and fuses.

The grounding of conductors enhances system reliability, reduces electromagnetic interference, and protects equipment and personnel from electrical shock hazards. In many electrical installations, especially those involving sensitive or high-stakes equipment, these connections are essential for ensuring operational safety and adherence to electrical codes.

The other statements do not accurately reflect the role and necessity of grounded conductors. They are not always non-carrying; while grounded conductors can serve as a neutral in a system, they also carry current under normal operating conditions. Their presence is vital in most electrical installations for safety purposes. Furthermore, the suggestion that they should not be used in industrial applications overlooks their critical function in protecting equipment and personnel within these environments.