Earthing Grid Calculator IEEE 80 · IEC · AS 2067
Soil & Surface
Soil model
Upper-layer ρ
Ω·m
Grid & Conductor
Length Lx
m
Width Ly
m
Spacing D
m
Depth h
m
Conductor Ø d
mm
‖ X count
cond.
‖ Y count
cond.
Material
Joint
Fault & Rods
Fault current If
A
Fault duration tf
s
Rods — count
×
Rods — length Lr
m
Plan View IEEE 80 §16.5 · geometry from Steps 1 & 4 · hotspots from Step 7
Export SVG PNG Rods CSV
Plan view · Lx × Ly grid mesh + ground rods (positions illustrative) · Em worst-case corner mesh (symmetric) · Es / GPR hotspots
Vertical section · crushed rock ρs / hs · native soil ρ (or two-layer ρ₁ / ρ₂ + reflection K) · burial depth h · rod Lr — schematic, not to scale
Analysis solved
IEEE Std 80-2013 §11–§16
Document Audit-ready sheet
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
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