---
kind: "section"
citation: "49 C.F.R. § 236.56"
title: "49"
number: "236.56"
heading: "Shunting sensitivity."
url: "https://uscodex.org/cfr/49/236.56"
---

# §236.56. Shunting sensitivity.


Each track circuit controlling home signal or approach locking shall be so maintained that track relay is in deenergized position, or device that functions as a track relay shall be in its most restrictive state if, when track circuit is dry, a shunt of 0.06 ohm resistance is connected across the track rails of the circuit, including fouling sections of turnouts.


## Notes

### Amendments

[49 FR 3383, Jan. 26, 1984]

### Authority

Authority: 49 U.S.C. 20102-20103, 20107, 20133, 20141, 20157, 20301-20303, 20306, 20501-20505, 20701-20703, 21301-21302, 21304; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 33 FR 19684, Dec. 25, 1968, unless otherwise noted.

### Amendments

[49 FR 3383, Jan. 26, 1984]