Current through September 30, 2024
Section 236.309 - Loss of shunt protection; where required(a) A loss of shunt of 5 seconds or less shall not permit an established route to be changed at an automatic interlocking.(b) A loss of shunt of 5 seconds or less shall not permit the release of the route locking circuit of each power-operated switch hereafter installed.49 FR 3385, Jan. 26, 1984