49 CFR § 236.309 Rules, Standards, and Instructions Governing the Installation, Inspection, Maintenance, and Repair of Signal and Train Control Systems, Devices, and Appliances

§ 236.309 Loss of shunt protection; where required.

Current through Sep 25, 2026 · Read all of Part 236

(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]

← § 236.308 Mechanical or electric locking or electric circuits; requisites.§ 236.310 Signal governing approach to home signal. →