uninsulated
Adjective
Meaning
uninsulated (not comparable)
Lacking insulation; not insulated
Examples
Early 20th-century carbon composition resistors had uninsulated bodies; the lead wires were wrapped around the ends of the resistance element rod and soldered.
Mica is also used as an insulator in concrete block and home attics, and can be poured into walls (usually in retrofitting uninsulated open top walls).
Early 20th century resistors, essentially uninsulated, were dipped in paint to cover their entire body for color-coding.
However, the cables soon began to fail as a result of deteriorating insulation and were replaced with uninsulated wires on poles.