Changes

* The electrical grid is composed of over 450,000 miles of high-voltage power lines<ref name="energy.gov">http://energy.gov/articles/top-9-things-you-didnt-know-about-americas-power-grid</ref> and over160,000 miles of overhead [[transmission lines]]<ref name="HowStuffWorks.com">Brain, Marshall, and Dave Roos.  "How Power Grids Work"  01 April 2000.  HowStuffWorks.com. <http://science.howstuffworks.com/environmental/energy/power.htm>  25 January 2016.</ref>

* The electrical grid is composed of over 450,000 miles of high-voltage power lines<ref name="energy.gov">http://energy.gov/articles/top-9-things-you-didnt-know-about-americas-power-grid</ref> and over160,000 miles of overhead [[transmission lines]]<ref name="HowStuffWorks.com">Brain, Marshall, and Dave Roos.  "How Power Grids Work"  01 April 2000.  HowStuffWorks.com. <http://science.howstuffworks.com/environmental/energy/power.htm>  25 January 2016.</ref>

* The [[United States]] power grid is actually composed of three different grids, which are called [[interconnections]].<ref name="energy.gov">http://energy.gov/articles/top-9-things-you-didnt-know-about-americas-power-grid</ref>

* The [[United States]] power grid is actually composed of three different grids, which are called [[interconnections]].<ref name="energy.gov">http://energy.gov/articles/top-9-things-you-didnt-know-about-americas-power-grid</ref>

* Mailbox-sized monitoring devices called [[synchrophasers]] are now used to monitor the health of the grid with detail never before available<ref name="energy.gov">http://energy.gov/articles/top-9-things-you-didnt-know-about-americas-power-grid</ref>

* Mailbox-sized monitoring devices called synchrophasers are now used to monitor the health of the grid with detail never before available<ref name="energy.gov">http://energy.gov/articles/top-9-things-you-didnt-know-about-americas-power-grid</ref>

==References==

==References==