Requirements for smoke alarms in dwellings have changed considerably over the decades, and the differences between a house wired in different eras are substantial. The oldest homes have no wired alarms at all, only battery units added later by occupants. Somewhat newer construction has hardwired alarms with no interconnection, so an alarm in the basement...
Author: lorenehowes
August 29, 2026August 29, 2026Post
Knob and Tube Wiring: What It Is and What It Means
Knob and tube was the standard residential wiring method in North America from roughly the eighteen eighties through the nineteen forties. It is easy to recognise once you know what to look for. Individual conductors, not bundled in a cable, running through ceramic tubes where they pass through framing and supported on ceramic knobs where...