panelboard.io Smart Panel Schedule, beta release
The Smart Panel Schedule engine automates the tedious process of creating, editing and maintaining panel schedules. No more spreadsheets or hand written, barely legible schedules.
AC Voltage Drop Calculator
Use the Bruns Engineering AC voltage drop calculator vdrop.brunsengineering.com to quickly and accurately calculate voltage drop.
Table 310.15(C)(1) Adjustment Factors for More Than Three Current-Carrying Conductors
Table 310.15(C)(1) Adjustment Factors for More Than Three Current-Carrying Conductors
NEC Table 250.66: Grounding Electrode Conductor for Alternating-Current Systems
NEC Table 250.66: Grounding Electrode Conductor for Alternating-Current Systems
NEC Table 250.122: Minimum Size Equipment Grounding Conductors for Grounding Raceway and Equipment
NEC Table 250.122: Minimum Size Equipment Grounding Conductors for Grounding Raceway and Equipment
Preferred Standard Nominal System Voltages in the United States
Overview ANSI C84.1 (2020 is the latest version) establishes voltage classes, ratings, and tolerances in the United States for 60 Hz power systems. Both standard… Read More »Preferred Standard Nominal System Voltages in the United States
NEC Table 9 Alternating-Current Resistance and Reactance for 600-Volt Cables, 3-Phase, 60 Hz, 75°C (167°F) — Three Single Conductors in Conduit
Table 9 in the National Electrical Code is provides copper and aluminum conductor resistance and reactance data. Units of resistance and reactance are ohms per… Read More »NEC Table 9 Alternating-Current Resistance and Reactance for 600-Volt Cables, 3-Phase, 60 Hz, 75°C (167°F) — Three Single Conductors in Conduit
AC Voltage Drop Calculation Table
Estimate Voltage Drop This table was calculated using the equation $latex V=I(R cos(\phi) + X sin(\phi))$ where $latex V$ is voltage, $latex I$ is current,… Read More »AC Voltage Drop Calculation Table
NEC Table 310.16 Ampacities of Insulated Conductors with Not More Than Three Current-Carrying Conductors in Raceway, Cable, or Earth (Directly Buried)
Table 310.16 is one of the most commonly used tables in the National Electrical Code. The reason is the inherent practicality and breadth of installations… Read More »NEC Table 310.16 Ampacities of Insulated Conductors with Not More Than Three Current-Carrying Conductors in Raceway, Cable, or Earth (Directly Buried)
Hydraulic Power in Crude Oil Systems
How to calculate hydraulic power in crude oil piping systems.