SAN FRANCISCO (Reuters) -Tesla plans to lay off 693 employees at its facilities in Sparks, Nevada, a government notice showed, as part of its plan to cut more than 10% of its global workforce amid dropping sales and rising competition. The notice was submitted to the Nevada Department of Employment, Training, and Rehabilitation earlier this week. A U.S. labor law requires companies with 100 or more employees to notify authorities 60 days ahead of planned closings or mass layoffs.