From Tiny to Titanic: 9+ Surprising Size Comparisons

LunarSaffron Updated: 2025-08-30

9. A Human Hand and a 400,000-volt cable comparison

400,000-Volt Underground Cable
Found In: Global (Subterranean) Estimated Installation Costs: $500,000 per mile Overview
When you think of cables, you might envision small wires powering everyday devices. However, for high-voltage applications, much stronger materials are required. Key Features
High Voltage: This underground cable operates at an impressive 400,000 volts and is roughly the size of a human hand.
Safety Concerns: The potential shock from contact with such a cable would be tremendous, highlighting the importance of safety around high-voltage installations.
Applications
Large-Scale Projects: These cables are essential for major installations, such as the National Grid, facilitating the transmission of electricity over long distances.
Conclusion
The 400,000-volt underground cable is a crucial component of modern infrastructure, enabling efficient power distribution while requiring careful handling due to its high voltage!