Gutter
Gutter turns up in 2 fields: electricians, printing. Here is what it means to the people in each one.
Gutter in electricians
Sheet-metal trough with a removable cover used to splice, tap and route conductors next to panels and disconnects.
A gutter is a wireway or auxiliary gutter: a square steel trough, often 4 by 4 or 6 by 6 inches, with a hinged or screw cover, mounted beside switchboards, meter banks and disconnects to tap and splice conductors and route them between equipment. Code limits conductor fill to 20 percent of the cross section, and 75 percent at any point where splices are made. The wiring space inside a panel between the interior and the enclosure wall is also called the gutter.
"Land the six taps in the gutter above the disconnects, insulate them, and get the cover on before the inspector shows."
Gutter in printing
The blank space between facing pages or adjacent columns of text.
The inner margin or blank space separating two facing pages in a bound book, or the vertical space between columns of text on a single page. In traditional letterpress, it also refers to the physical wood or metal furniture placed in the chase to create this spacing between type pages.
"Increase the gutter by a quarter inch so the text doesn't get lost in the binding fold."