What is the maximum voltage for bare signal wires to minimize risk of contact by persons?

The correct maximum voltage for bare signal wires to minimize the risk of contact by persons is 48 volts. This voltage level is established based on safety standards designed to protect individuals from electrical shock. At this voltage threshold, the likelihood of a serious electrical hazard is significantly reduced, making it a safer option for bare signal wiring, particularly in environments where contact could potentially occur.

Using 48 volts helps ensure that if a person were to come into contact with the wire, the risk of causing harm or injury is minimized. This is particularly important in mining and other industrial settings where employees may work in close proximity to electrical installations. Higher voltages can lead to more severe consequences in case of accidental contact, emphasizing the importance of adhering to the 48-volt limit for bare wires to enhance workplace safety.

Options that exceed this voltage limit would increase the risk of serious electrical shocks and injuries, thus not aligning with safety best practices in hazardous environments.