SUBPART C—Interlocking (§236.301 to §236.387)
- 236.301—Where signals shall be provided.
- 236.302—Track circuits and route locking.
- 236.303—Control circuits for signals, selection through circuit controller operated by switch points or by switch locking mechanism.
- 236.304—Mechanical locking or same protection effected by circuits.
- 236.305—Approach or time locking.
- 236.306—Facing point lock or switch-and-lock movement.
- 236.307—Indication locking.
- 236.308—Mechanical or electric locking or electric circuits; requisites.
- 236.309—Loss of shunt protection; where required.
- 236.310—Signal governing approach to home signal.
- 236.311—Signal control circuits, selection through track relays or devices functioning as track relays and through signal mechanism contacts and time releases at automatic interlocking.
- 236.312—Movable bridge, interlocking of signal appliances with bridge devices.
- 236.314—Electric lock for hand-operated switch or derail.
- 236.326—Mechanical locking removed or disarranged; requirement for permitting train movements through interlocking.
- 236.327—Switch, movable-point frog or split-point derail.
- 236.328—Plunger of facing-point lock.
- 236.329—Bolt lock.
- 236.330—Locking dog of switch-and-lock movement.
- 236.334—Point detector.
- 236.335—Dogs, stops and trunnions of mechanical locking.
- 236.336—Locking bed.
- 236.337—Locking faces of mechanical locking; fit.
- 236.338—Mechanical locking required in accordance with locking sheet and dog chart.
- 236.339—Mechanical locking, maintenance requirements.
- 236.340—Electromechanical interlocking machine; locking between electrical and mechanical levers.
- 236.341—Latch shoes, rocker links, and quadrants.
- 236.342—Switch circuit controller.
- 236.376—Mechanical locking.
- 236.377—Approach locking.
- 236.378—Time locking.
- 236.379—Route locking.
- 236.380—Indication locking.
- 236.381—Traffic locking.
- 236.382—Switch obstruction test.
- 236.383—Valve locks, valves, and valve magnets.
- 236.384—Cross protection.
- 236.386—Restoring feature on power switches.
- 236.387—Movable bridge locking.