Which conditions are known to make all voltages potentially dangerous?

The conditions that make all voltages potentially dangerous involve excessive humidity, wet or damp areas, and electrical contacts. When environments are excessively humid or contain moisture, the conductivity of materials increases. This enhanced conductivity can allow for unintended pathways for electrical current, creating a higher risk of electrical shock or short circuits.

Wet or damp areas increase the likelihood of contact with electrical systems and devices in ways that can facilitate dangerous situations. Even small voltages in these conditions can pose significant risks because moisture can allow a current to pass through the human body more easily. Electrical contacts, when combined with these environmental factors, can also exacerbate the risk, amplifying the potential for dangerous situations.

Environmental conditions like cold temperatures and metal surfaces or excessive heat and dryness, while potentially hazardous in certain contexts, don't universally render all voltages dangerous in the same manner as humidity and dampness do. Therefore, understanding the significance of moisture in conjunction with electrical contacts is crucial for maintaining safety around electrical systems.