Rule set (thresholds) — MEP Tools
The four project-editable compliance thresholds, their bounds, and what they're based on.
Open Rule Set on the ribbon to see and adjust the numeric thresholds the compliance checks use for this project.
The four thresholds
| Threshold | Tool Default | Editable range |
|---|---|---|
| Zone B minimum width | 600 mm | 300–2000 mm |
| ELV / non-ELV separation | 300 mm | 0–1000 mm |
| Clearance above dry tray | 250 mm | 0–1000 mm |
| Arm's reach limit | 900 mm | 400–2000 mm |
A value you type outside the editable range is rejected and the preset value keeps being used — it isn't silently clamped to the nearest bound.
Where the numbers come from
Every threshold is classed as either a Convention or Tool judgement — none of them is a code-mandated figure. The panel shows the reasoning behind each one (industry rule-of-thumb, a related standard's figures, or the tool's own model) next to its value, so you can judge whether it fits your project or needs overriding.
Only one preset — Tool Default — ships today.
Overriding a value
Change a threshold and the panel marks it Overridden, with a table comparing the preset value to the one in use. Reset to preset clears an override back to the preset value. Overrides are saved with the project, so reopening it later re-checks the layout against the same numbers you set.
Why this matters for auto-arrange
Auto arrange (see Auto arrange) lays the section out against these same thresholds, so tightening or loosening a value here changes how much room the automatic layout reserves before you run it.