Electric Vehicle Charging Systems: The SEC has established provisions for the future installation of electric vehicle charging equipment. Article 625.27 has been added to establish requirements for physical space in the service equipment to install a future disconnect for electric vehicle charging. The article also requires pre-planning where the panels and charging outlets would be installed. Consideration should also be given to routing raceways to the required parking areas. Article 220.57 identifies the additional electric vehicle load calculations to be added to the service demand loads. It is anticipated at this time that electric vehicles will be available in the Seattle area as early as the fall of 2010.

Selective coordination as required by Articles 620.62, 700.27, 701.18, and 708.54 has been amended by the SEC. Fault current calculations provided by a licensed electrical engineer may be selectively coordinated for faults with a duration of 0.1 seconds or longer. The calculations will be required to be wet stamped by a licensed Washington State electrical engineer. All other calculations will be required to be calculated to infinity and will not be permitted to utilize adjustable trip breakers to achieve selective coordination.