Mouse
A foam plug blown through conduit to drag a pull string behind it.
Definitions
A small foam or felt plug — sometimes a wad of plastic bag — shot through an empty conduit with a vacuum or compressed air, dragging a pull string behind it. Once the string's through, you use it to pull the actual wires. Called a mouse because it scurries through the pipe.
Mouse In A Sentence
Origin & Usage
Trade slang; the plug 'runs' through conduit like a mouse through a tunnel.
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