3 NEC Charts-Compilation for Electricians

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Today we are sharing with you 3 NEC Charts that James Boone from www.PowerSoftEng.com has graciously shared.

He has been researching over the years and has put together cheat sheets for us all to use.

"All of the things recorded in these charts are accumulated knowledge and research in many areas of personal interests and business. I hope you find the information helpful as I have."

By James Boone, Electrical Designer.

Thank you Mr. Boone!

Must have formulas for your electrical exam


*Click on each chart title to download the PDF*


This chart is designed to allow designers or field technicians the ease of finding NEC charts without the need of a code book. Readers should make their own determinations that the information contained herein is relevant to any specific situation where wiring is concerned. This chart incorporates most all instances of sizing wire ampacity, conduit fill, motor charts, grounding, power riser schedule and grounding schedule. The riser and grounding schedules show no particular code requirement, but a suggestion of naming wires for use in power risers, although there is no consideration for voltage drops. Make all adjustments as required. The motor charts were compiled from manufacturing agents for sizing motors that are within normal bounds of circuiting.
This chart has information regarding sections in the NEC, formulas, conduit table, power factor selections, some circuit design information, motor charts, working space and basic information for generators/elevators. This chart also includes a full service transformer information guide but depending on transformer specifics, can change, based on many design characteristics. Use this information only when using general specifics. This chart also shows general panelboard and transformer dimensions based on general information. Use sizes and information only as a general rule of thumb.
This chart has many tables that can be used for determining what type of service/branch to designate for a riser element. The elevator chart is only a suggestion as exact sizing is based on many factors that may not immediately be known on design startup. There are some useful notes to recall when designing electrical systems in buildings. There is also some less important tables:
Converting metric to English or visa-versa.
Current carriers in conduit and what wires are required.
Warning signs.
Trigonometry formulas.
Temperature factors.
Tap rule.
Costs of energy generation.
Energy comparisons.
Fuel efficiency.
Material resistivity and boiling points.

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