noun
in-house fire brigade; self-defense fire brigade
A firefighting unit organized within a building, company, or facility, distinct from the public fire department. Often required by law for large buildings or hazardous facilities.
このビルには自衛消防隊が組織されている。
An in-house fire brigade is organized in this building.
自衛消防隊の訓練が年に2回行われる。
Training for the self-defense fire brigade is held twice a year.
消防署 is the public fire station/department, while 自衛消防隊 is a private, in-house fire brigade.
Compound of 自衛 (self-defense) + 消防 (firefighting) + 隊 (corps, unit).