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→Locomotive applications: Added image pointing out the layout of MU cables/hoses on a North American locomotive. Simillar to the image of the Class 40 on the seperate Multiple Working article. |
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==Locomotive applications==
[[File:F40PH Illustrated Hoses and Cables.png|thumb|[[EMD F40PH]] Locomotive with image edited to illustrate the ___location and functions of the various receptacles and hoses featured on many AAR Standard North American locomotives. The communication jumpers (outermost yellow) are exclusive to passenger locomotives and are omitted from freight locomotives.]]
Sprague's MU system was adopted for use by [[diesel-electric locomotive]]s and [[electric locomotive]]s in the 1920s; however, these early control connections were entirely pneumatic. Today's modern MU control utilizes both pneumatic elements for brake control and electric elements for throttle setting, dynamic braking, and fault lights.
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