Select a standard MCB/MCCB breaker size from amps or kW.
Optional IEC and NEC verification checks using cable ampacity (Iz), fault level, ambient temperature, grouping, and altitude factors.
🧮 Inputs
Auto calculate enabled (no Calculate button).
📈 Results
Load Current (Ib):
0.00 A
Required Breaker Current:
0.00 A
Recommended Breaker:
0 A
IEC Check (Ib ≤ In ≤ Iz):
—
NEC Check:
—
Correction Factor (Kt):
—
Effective Iz (Iz × Kt):
—
Fault Level Requirement:
—
💡 Icu/AIC Safety Recommendation:
⚙️ NEC Verification Details (for — Breaker)
Step 1: Sizing Calculation
Required rating after derating:
0.00A
(1.25 × 0.00A) / 1.00
Step 2: Compliance Checks
Conductor Protection (In ≤ Iz):
—
Check: —
Interrupting Rating (AIC ≥ Fault):
—
Check: —
✖ One or more NEC checks failed for the first suitable breaker size (—). Review details.