power linennoun: Refers to person, place, thing, quality, etc.
(electricity supply cable)
电力线 diàn lì xiàn
输电线 shū diàn xiàn
电源线 diàn yuán xiàn
When lightning struck a nearby power line, our neighbourhood suffered a blackout for several days. Hundreds of homes were without electricity last night after a storm took down power lines.