The North American interconnected power systems continuously
attempt to hold power system time as close to standard time as possible.
All inherent problems associated with normal power system
operation make this a difficult task. System time is presently allowed
to deviate from standard time by up to two seconds before...
Published July 1966. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog