What is the largest transmission voltage for WECC?
The Western Electricity Coordinating Council (WECC) operates the electric grid in the western United States and part of Canada. The largest transmission voltage in the WECC grid is 500 kilovolts (kV). This voltage is used for long-distance transmission of power. The WECC grid also operates at 138 kV, 230 kV, and 345 kV.