Morningstar Electric LLC Tool Kit
Field calculators, how-to guides and an NEC quick reference for electricians — from Morningstar Electric LLC
Works offlineField Calculators
🔌Wire Sizing310.16 ampacity, ambient & fill derating⚡Breaker / OCPD125% continuous, motors per 430🧰Conduit FillCh. 9: EMT, PVC 40/80, RMC📐Conduit BendingOffsets, saddles, stubs, kicks, gain📦Box Fill & Pull Boxes314.16 box fill, 314.28 pull boxes📉Voltage Drop1Ø/3Ø K-factor, 3% & 5% sizingΩOhm's LawV·I·R·P wheel, 1Ø/3Ø power, kVA🏠Load Calc220 Standard & 220.82 Optional, service size🔋Generator HookupRunning/starting watts, inlet & cord☀️Solar & BatteryVoc temp correction, 120% rule, inverter OCPD🌀Motor CalculatorFLC, 125% conductors, 430.52, overloads🔺Transformer CalculatorkVA to amps, 450.3(B) OCPD⏚Grounding & BondingGEC 250.66, EGC 250.122, rods & Ufer🗂️Panel Schedule BuilderCircuit directory, phases, connected load
Reference
📘NEC Quick ReferenceSearchable plain-language summaries🎨Wire Color Codes120/240, 208Y/120, 480Y/277 conventions🔣Plan SymbolsOriginal SVG electrical plan symbols📊Conduit Fill ChartMax THHN in EMT & PVC 40
How-To Guides
📚All How-To Guides21 step-by-step field guides🔋Test a CapacitorµF = 2652 × A ÷ V checker🛡️GFCI / AFCI Breaker TestingBrand LED trip codes, cited⚠️Tripping BreakerShort, overload or fault?🔌240 V Circuit & NeutralExpected readings, load test↯Open / Backfed NeutralSymptoms, tests, fixes🧲Check a ContactorCoil, contacts, voltage dropΩMegger / IR BasicsTest voltage, minimums, PI🏠Generator Interlock & InletChecks before first start📐Conduit Bending How-ToStubs, offsets, saddles — diagrams🔎Test a Solar Panel / PV StringSafety, Voc/Isc tests, pass/fail💡Lutron Caséta ProgrammingPairing, trim, resets, LED codes🌡️Sensi Thermostat InstallST55 wiring, C-wire, app setup❄️ecobee Thermostat InstallEnhanced, PEK, heat-pump O/B🚗EV Charger Install625 continuous load, GFCI, EVEMS📋Panel & Service UpgradeClearances, 230.85, inspection checklist⬛Dead Outlet / Lost CircuitTracing an open or lost circuit✨Flickering or Dimming LightsLoose neutrals, voltage drop, bad dimmers🔥Hot or Buzzing BreakerHeat, loose lugs, failing breaker🏊Pool & Spa Bonding680.26 equipotential bonding, GFCI🪢Wire Pulling Cheat SheetTension, sidewall pressure, grips, lube🌩️Surge Protector (SPD)Types 1/2/3, 230.67, Art. 242
Customer Cost Calculators
🏡Generator Size CalculatorHomeowner-friendly sizing🚗EV vs Gas CostHome charging vs gasoline🌡️AC Temperature vs CostSmart thermostat savings
Code Edition
Install on your phone: iPhone — Safari → Share → Add to Home Screen. Android — Chrome menu → Install app. Once opened, the Morningstar Electric LLC Tool Kit works with no signal.
Reference only — not engineering, legal, or code-compliance advice. Results are estimates for qualified persons and must be verified against the NEC edition adopted where the work is done (your selected edition), manufacturer instructions, and the local AHJ. Use is subject to the Terms of Use & Disclaimer. — Morningstar Electric LLC