Skip to content
PanelCalc
Browse: Calculators, Guides, About

Arc Flash Incident Energy Screening

First-pass incident energy and flash boundary from fault current, clearing time, and distance. 5 inputs, 3 outputs with grouped results.

Inputs

Fault and clearing

Available fault current at the panel.

Upstream device clearing time; 6 cycles at 60 Hz is 0.1 s.

Arcing current factor band.

Geometry

455 mm is the low-voltage MCC/panel working distance.

Box focuses arc energy toward the worker.

Result

Planning PPE category
Waiting for calculation.
Flash boundary
Waiting for calculation.
Incident energy
Waiting for calculation.
Screening calculation only. Verify against NEC articles cited on the page and the equipment nameplate; the authority having jurisdiction governs.

Related calculators

Calculator

Cable Tray Fill Calculator

Tray fill per NEC 392: allowable area, cable area used, and the fill verdict. 5 inputs, 4 outputs with grouped results.

Outputs: Allowable fill area · Cable area used · Fill used

Open calculator

Calculator

Conduit Fill Calculator

NEC Chapter 9 fill with wire-area picker, conduit picker, derating hint and spare verdict. 4 inputs, 4 outputs with grouped results.

Outputs: Raceway fill · NEC limit · Fill compliant (1=yes)

Open calculator

Calculator

Electrical Box Fill Calculator

NEC 314.16 fill from gauge-based allowance, conductors, devices, grounds, clamps, with verdict. 6 inputs, 4 outputs with grouped results.

Outputs: Conductor units · Fill used · Remaining

Open calculator

Calculator

Fault Current Calculator

Infinite-bus fault current with impedance picker, kA result, AIC verdict and common breaker ratings. 4 inputs, 4 outputs with grouped results.

Outputs: Available fault current · In kilo-amps · AIC margin

Open calculator

Workspace

Keep the assumptions with the result.

Save this calculation to return to the inputs, result, and report from your private workspace.

Sign in or create an account to save this calculation.