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Term used to describe the restriction on the movement of AC electric trains or engines in a specified
area. - ✔✔AC hold
A luminous and potentially destructive flash or flame in or about the wires, third rail, or electric
apparatus caused by the passage of electric current through the air. - ✔✔Arc
Solid wire suspended from the messenger wire from which the contact wire is attached - ✔✔Auxiliary
Wire
An alarm generated when the air system to the pantograph has been compromised - ✔✔Broken
paragraph/carbon alarm (BPA)
The complete path of which electric current is transmitted from and returned to its source - ✔✔Circuit
Lineman, substation electricians, third rail men, and c and s employees trained and qualified to provide
protection services work on or about the electrification system. - ✔✔Class A
Mechanical department employees trained to perform work on top of electric equipment in electrified
terriftory under the conditions authorized in these instructions, for their protection only. - ✔✔Class "B"
Employees qualified to perform work in electrified territory. - ✔✔Class "C"
The part of the pantograph made up of a set of carbon strips and horns connected to main frame of the
pantograph assembly by means of an apex. - ✔✔Collector Head Assembly
The wire in the catenary from which the pantograph connects current. - ✔✔Contact Wires