CalcRig
· CalcRig Team
Wire Sizing and Voltage Drop: What Every Electrician Needs to Know
A practical guide to NEC-compliant wire sizing and voltage drop calculations for residential and commercial work — with the exact formulas used in CalcRig.
Trade Calculation Guides
How-to guides for electricians, HVAC technicians, plumbers, and construction pros — with the NEC, ASHRAE, UPC, and IRC references behind each calculation.