Simple diagram of electricity grids in North America.
<a href="//commons.wikimedia.org/wiki/User:Manlleus" title="User:Manlleus">Manlleus</a>
CC BY-SA 4.0
<a href="//commons.wikimedia.org/wiki/File:Electricity_grid_simple-_North_America.svg" title="File:Electricity grid simple- North America.svg">File:Electricity_grid_simple-_North_America.svg</a> <span class="int-own-work" lang="en">Own work</span>, originally from <a rel="nofollow" class="external free" href="https://www.ferc.gov/industries/electric/indus-act/reliability/blackout/ch1-3.pdf">http://www.ferc.gov/industries/electric/indus-act/reliability/blackout/ch1-3.pdf</a> Page 13 Title:"Final Report on the August 14, 2003 Blackout in the United States and Canada" Dated April 2004. Accessed on 2010-12-25