49 CFR Part 236 - Subpart C - Interlocking
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Standards (§§ 236.301 - 236.314)
- § 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.
- § 236.313 [Reserved]
- § 236.314 Electric lock for hand-operated switch or derail.
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Rules and Instructions (§§ 236.326 - 236.342)
- § 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.
- §§ 236.331-236.333 [Reserved]
- § 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.
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Inspection and Tests (§§ 236.376 - 236.387)
- § 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.
- § 236.385 [Reserved]
- § 236.386 Restoring feature on power switches.
- § 236.387 Movable bridge locking.