specs for rewrite

2026-05-03 19:15:46 +02:00
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+# Domain Context: Distribution Board Circuit List
+
+## Purpose
+
+In electrical building design, especially during detailed design / execution planning, a circuit list is created for each distribution board.
+
+The circuit list documents all consumers, devices and circuits supplied by or installed in a specific distribution board. It supports:
+
+- construction of the distribution board by the electrical contractor
+- execution planning and technical coordination
+- quantity takeoff for tendering and cost estimation
+- determination of required protective devices, terminals, modular DIN rail devices and related components
+- structured documentation of the internal electrical path inside the distribution board
+
+Although the term "circuit list" is used, the list does not only contain final outgoing circuits. It may also contain or later support devices and functional components such as:
+
+- main switches
+- surge protection devices
+- KNX devices
+- control devices
+- modular DIN rail devices
+- reserve circuits
+- other distribution board components
+
+## Important Domain Rule
+
+A circuit list entry is not always just a single independent circuit.
+
+A circuit can contain one or more device rows.
+
+If a circuit contains one device, it can be displayed as one compact row.
+
+If a circuit contains multiple devices, the UI displays:
+
+- one circuit summary row
+- one or more indented device rows below it
+
+Circuit-level data such as protection device, cable type and cable length belongs to the circuit, not to each individual device.