Electrical power transmission occurs between the power stations and the electrical substations through overhead and underground cables.  The interconnection of transmission lines create networks which, in turn, create the power grids.

Overhead transmission structures vary in design depending on the type of line being supported.  They range from simple wood poles to steel towers.  These towers require aerial identification markers to denote the location and ownership of the tower.  Additional signage is necessary to warn unauthorized people of the dangers of climbing the towers and the high voltage carried by the wires.

electrical transmission signage

Underground transmission occurs through underground power cables.  This method takes up no physical space above ground and is not visibly intrusive to the landscape.  Power is also unaffected by bad weather.  The costs of installation are higher and the time to locate problems is longer.  Cable identification tags are used in cable vaults, tunnels and at transformer boxes to identify and categorized the multitude of wires and cables transmitting the power and telecommunications.  Additional safety identification such as danger high voltage labels and more are required to warn of high voltages, arc flash and confined spaces.