This practical guide shows you how to complete a signed, QR-verified Arc Flash, Shock Boundary & PPE Safety Audit certificate in OhmCert Module #14 and how to troubleshoot non-compliant readings on site.

1. Step-by-Step OhmCert UI Workflow

  1. Open Module #14: Navigate to Arc Flash, Shock Boundary & PPE Safety Audit from the Dashboard.
  2. Load a 1-Click Standard Annex Preset: Open the blue Standard Annex banner at the top and click a preset (such as "400 V LV MCC / Panelboard (Ibf=25 kA, t=0.08 s, D=455 mm, Cat 2)") to populate target limits automatically.
  3. Enter Your Field Measurements: Fill in the measured inputs (System Nominal Voltage (L-L), Equipment Class & Gap (IEEE 1584), Available 3-Phase Bolted Fault Current I_bf, Protective Device Arc Clearing Time t_arc, Working Distance D, Manual Incident Energy Override (optional, from ETAP/SKM), Arc-Rated PPE Category Provided (0-4), Insulating Glove Class Provided (IEC 60903)). Blank inputs stay neutral PENDING.
  4. Complete the 20-Point Checklist: Grade each item, attach photos if needed, and export the SHA-256 signed PDF certificate.

2. Worked Numerical Field Case Study

Scenario: 400 V LV MCC / Panelboard (Ibf=25 kA, t=0.08 s, D=455 mm, Cat 2) (IEEE 1584 LV MCC) — 400 V MCC with 25 kA bolted fault, 80 ms breaker clearing, 455 mm working distance, Category 2 PPE & Class 0 gloves..

  • System Nominal Voltage (L-L): 400 V
  • Equipment Class & Gap (IEEE 1584): LV MCC / Panelboard (25 mm gap, D=455 mm)
  • Available 3-Phase Bolted Fault Current I_bf: 25 kA
  • Protective Device Arc Clearing Time t_arc: 0.08 s
  • Working Distance D: 455 mm
  • Arc-Rated PPE Category Provided (0-4): 2
  • Insulating Glove Class Provided (IEC 60903): Class 0 (<= 1000 V AC)

3. Engineering Troubleshooting: Corrective Actions When a Reading Fails

  1. Enable an Arc-Flash Maintenance Switch (RELT / Zone-Selective Instantaneous mode) before personnel approach energized panels to cut clearing time t below 0.05 s.
  2. Install optical arc-flash detection relays coupled with high-speed grounding switches or shunt trips.
  3. Enforce remote racking / remote switching so operators remain outside the calculated Arc-Flash Boundary (AFB).

→ Try This Worked Example Live in Module #14 (Arc Flash & PPE Audit)