Grounding, Bonding & Safety
Equipment grounding conductor and grounding electrode conductor sizing, electrode system selection, bonding jumpers, pool and spa equipotential bonding, GFCI and AFCI requirements, working space clearance and termination torque.
Equipment Grounding Conductor Sizing
Size the equipment grounding conductor (EGC) per NEC §250.122 based on circuit breaker/fuse rating. Includes parallel conductor rules (§250.122(F)) and voltage drop upsizing (§250.122(B)).
Open calculator NEC 2026 / 2023Grounding Electrode Conductor Sizing
Size the Grounding Electrode Conductor (GEC) from the largest service entrance conductor per NEC §250.66. Applies ground rod, concrete-encased (Ufer), and ground ring electrode caps.
Open calculator NEC 2026 / 2023Grounding Electrode System Builder
Design compliant grounding electrode systems: concrete-encased Ufer, 25-ohm dual rods, water pipe supplemental rules, and GEC limits per NEC §250.50–68.
Open calculator NEC 2026 / 2023Bonding Jumper Sizing Calculator
Size Main Bonding Jumpers (MBJ), System Bonding Jumpers (SBJ), and Supply-Side Jumpers (SSBJ) per NEC §250.102 & Table 250.102(C)(1).
Open calculator NEC 2026 / 2023GFCI vs AFCI Requirement Checker
Determine where GFCI protection (§210.8) and AFCI protection (§210.12) are required by room, location, voltage, and occupancy type (dwelling vs commercial) under NEC 2026/2023.
Open calculator NEC 2026 / 2023Pool & Spa Bonding Calculator
Calculate equipotential bonding grid requirements, pool pump GFCI protection, and overhead wire clearances per NEC Article 680.
Open calculator NEC 2026 / 2023Electrical Panel Clearance Calculator
Calculate NEC §110.26 clear working depth (Conditions 1/2/3), 30" width, 6.5ft headroom, and dedicated equipment space for electrical panels.
Open calculator NEC 2026 / 2023Terminal Torque & Tightening Lookup
Look up electrical termination torque values (lb-in, lb-ft, N·m) for lugs, breakers, and screws per NEC §110.14(D) & Table 110.14(D).
Open calculator NEC 2026 / 2023NEMA Plug & Receptacle Configuration Lookup
Lookup pinouts, voltages (120V–480V), wire sizes, breaker ratings & wire color codes for NEMA 5-15, 14-50, L14-30 & all NEMA WD-6 devices.
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