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Copyright 2021
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MAC Rail LLC. Fort Worth, Texas 76244 wwww.macrailproducts.com
UNDERSTANDING SHUNT BOXES
On the prototype, these boxes have a few different uses around signal systems.
1) If observed on right of way alone they just contain a track shunt.
2) When found at insulated track joints they are being used to assist getting the grade
crossing detection current frequency that is in the rail around an insulated joint found
at Control Points and Intermediate Signals.
Given the different configurations found on railroads circuit frequencies, track
configuration, and speed it is best to refer to prototype photos using google streetview.
General Placement:
- 8
’
from track center
- Door is located on
“
Field
”
side away from tracks
- Using item #1 and #2 as guidance, install away!
Example below @ Rhome, TX. Photo is taken from grade crossing.
.
