Cable sizing that solves everything at once
Design current, correction factors, capacity, voltage drop and earth fault loop impedance are evaluated together — the size that appears already passes every check.
Electrical design workspaceDesign circuits,
not spreadsheets.
designR is a browser workspace for electrical designers: cable sizing worked to BS 7671 methodology, live circuit schedules and a schematic canvas — no desktop install, no licence dongle.
Layout · schematic · boards, in syncBS 7671 design checks
Schematics without the CAD tax
A snapping symbol canvas for supplies, boards, protective devices and final circuits. Draw a single-line diagram in minutes, in the browser.
Circuit schedules that stay honest
Every circuit keeps its inputs and its verdict. Change an ambient temperature or a grouping factor and the schedule tells you what now fails.
5
installation methods tabulated
16
conductor sizes, 1–240 mm²
8
design checks per circuit
13
schematic symbols on the canvas