规定了外部供电互连烟雾报警器的安装和调试要求。它还提供有关烟雾报警器的选择、安装和维护的信息。为烟雾报警器的选择及其位置提供了额外的指导，以避免干扰激活。

Sets out the requirements for the installation and commissioning of externally-powered interconnected smoke alarms. It also provides information on the selection, installation, and maintenance of smoke alarms. Additional guidance has been provided for the selection of smoke alarms, and their location to avoid nuisance activations.