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ROUGH-IN

Conduit Bending Calculator

Conduit Fill & Raceway Sizing Calculator

Junction Box Fill Calculator (NEC 314.16)

Ethernet & PoE Calculator

WIRING

Wire Size Calculator

Wire Ampacity & Derating Calculator (NEC 310.16)

Voltage Drop Calculator (AC & DC)

Grounding Electrode Conductor (GEC) Calculator

POWER & PLANNING

Residential Service Load Calculator

Transformer Sizing Calculator (kVA & Amps)

Lighting Layout & Spacing Calculator

Ohm's Law Calculator

UTILITIES

Construction Math Calculator

Motor FLA & Protection Calculator (NEC Art. 430)

Circuit Breaker & Fuse Sizing Calculator

NEC 2020 Code Search & Lookup

Reference Charts

310.16: Conductor Ampacities 250.66: Grounding Electrode Conductor (GEC)250.122: Equipment Grounding Conductor (EGC)310.15(B)(1): Temp. Correction Factors 310.15(C)(1): Adjustment Factors Ch 9 Table 8: Conductor Properties Ch 9 Table 4: Conduit Fill 314.16(A): Metal Box Fill 314.16(B): Volume Allowances 250.102(C)(1): Bonding Jumper 300.5: Minimum Burial Depth

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Calculators & Tools →

Conduit Bending Calculator Conduit Fill Calculator Voltage Drop Calculator Load Calculator Motor FLA & Protection Ampacity Calculator Transformer Sizing Calculator Grounding & Bonding Calculator Circuit Breaker & Fuse Sizing Junction Box Fill Calculator Wire Wizard Calculator Lighting Layout Calculator Ohm's Law Calculator NEC 2020 Code Search Ethernet & PoE Calculator Scientific Calculator

NEC Reference Tables →

310.16: Conductor Ampacities 250.66: Grounding (GEC)250.122: Equipment Grounding 250.102(C)(1): Bonding Jumper 310.15(B)(1): Temp. Correction 310.15(C)(1): Adjustment Ch 9 Table 8: Properties Ch 9 Table 4: Conduit Fill 314.16(A): Box Fill 300.5: Minimum Burial Depth

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