In a classic installation the control sits in the circuit itself: a switch interrupts the line conductor to the lamp. With home automation the control happens elsewhere — through a relay, a module in the board or a bus system. Your diagram has to show both layers without tangling them.
Two layers, one diagram
Separate the power circuit (which feeds the lamp or socket) from the control circuit (push buttons, sensors or the bus). On the single-line diagram the power circuit hangs under its breaker as usual; the controlling element is noted alongside, so it is clear what the circuit switches.
What an inspector wants to see
- The supply to the automation modules, with its own protection.
- Which circuits are switched by relays or modules.
- A clear indication of the low-voltage bus wiring.
- Separation between control and power cables where required.
Keep it readable
It is tempting to cram every push button and bus link onto the same sheet. Do not. Use clear circuit numbering, group controlled circuits by zone and use the position diagram to show where the controls are. A diagram nobody can read helps at inspection about as much as no diagram at all.
Related reading
How Voltuno helps
Lining up controlled circuits neatly is work the editor does for you. With Voltuno you draw a correct single-line diagram, position diagram and matching bill of materials in minutes, straight from your browser. The software is built around AREI requirements, so you work faster and walk into the inspection with a clear, complete file.
Please note: this article is a general explanation and not legal advice. Always consult the official, consolidated AREI text (FPS Economy) for the exact obligations and article references.
