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Earthing grid

Assess grid resistance, touch and step voltages with the IEEE Std 80-2013 closed-form screen.

IEEE 80 · IEC 60364-5-54 · AS 2067

1 · Soil and surface

Soil model
Ω·m
Ω·m
m

2 · Grid geometry

m
m
m
m
cond.
cond.

Equal-mesh model: D = Lx/(Nx − 1) = Ly/(Ny − 1).

3 · Conductor

mm

4 · Fault

Fault Current calculator
A
s
ratio
ratio

5 · Ground rods

rods
m

Rod diameter 16 mm unless a saved record declares another value.

Results

Analytic screen against the tolerable touch and step voltages.

solved

Plan view and section

Illustrative · IEEE 80 §16.5
Plan SVG Plan PNG Rod schedule CSV

Plan view: Lx × Ly grid mesh and ground rods (positions illustrative); Em worst-case corner mesh (symmetric); Es and GPR hotspots.

Vertical section: crushed rock ρs / hs, native soil ρ (or two-layer ρ₁ / ρ₂ with reflection K), burial depth h and rod Lr. Schematic, not to scale.

Detailed analysis Steps, geometry, compliance and audit
IEEE Std 80-2013 §11–§16

Document

Record details, engineering notes and references for the printed calculation.

Engineering notes

  1. Screening-level calculation per IEEE 80 closed-form equations. Field-critical designs verified with FEM (CDEGS / ETAP GroundMat / WinIGS).
  2. Soil resistivity assumed measured; Wenner four-pin survey per IEEE 80 §13.3 out of scope.
  3. Split factor Sf from system data; default 1.0 produces a conservative over-design (§15.9 Annex C).
  4. Transferred potentials (§17), fence grounding (§19), lightning / transients (AS/NZS 1768, IEC 62305) not modelled.

References

  • Awaiting inputs.
Working calculation · Rev A Print or save as PDF A professional aid, not engineering judgement — you remain responsible for verifying every input and result against the standards that apply to your work.