5 grids (of which Texas is one), and they're not even just US ones - we share with Canada: https://i.cbc.ca/1.5921020.1613772812!/fileImage/httpImage/image.jpg

5 grids (of which Texas is one), and they're not even just US ones - we share with Canada: https://i.cbc.ca/1.5921020.1613772812!/fileImage/httpImage/image.jpg_gen/derivatives/original_1180/how-power-is-shared-in-north-america.jpg https://i.cbc.ca/1.5921020.1613772812!/fileImage/httpImage/i... They're then further subdivided into operators: https://en.wikipedia.org/wiki/North_American_power_transmission_grid https://en.wikipedia.org/wiki/North_American_power_transmiss...