Why high voltage lines (overhead ) are called high tension
lines?
Answer Posted / doug
It has nothing to do with the physical tension on the wires.
Rather, it's based on old terminology. In the early
1900's, voltage was seen as "electrical pressure" or
"electrical tension." While "pressure" is no longer used to
describe voltage (outside of educational analogies), the
term "High Tension" is still used when describing wires used
to transmit at a high voltage and low current.
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