Power outage
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A power outage is the loss of the electrical power network supply to an end user.
Vehicle lights provided the only illumination during the 2009 Ecuador electricity crisis.
Tree limbs creating a short circuit in power lines during a storm. This typically results in a power outage in the area supplied by these lines
Comparison of duration of power outages (SAIDI value), in 2014.
Electric power transmission
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Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. The interconnected lines that facilitate this movement form a transmission network. This is distinct from the local wiring between high-voltage substations and customers, which is typically referred to as electric power distribution. The combined transmission and distribution network is part of electricity delivery, known as the electrical grid.
A four-circuit, two-voltage power transmission line; Bundled 2-ways
A typical ACSR. The conductor consists of seven strands of steel surrounded by four layers of aluminium.
Three abreast electrical pylons in Webster, Texas
New York City streets in 1890. Besides telegraph lines, multiple electric lines were required for each class of device requiring different voltages.