Observed arrival · 2026-10-18
LineWorks Motor Circuit Builder
A browser-based tool for sizing motor circuits under NEC Article 430, with inputs for single or grouped motors and printable calculation schedules.
- For
- Electricians sizing NEC motor circuits
- Worth noticing
- It offers copper or aluminum conductors, numerous insulation and temperature options, and voltage-drop settings for every circuit.
Field notes
Users set job metadata and shared conductor and system assumptions, then enter one or more motor circuits. The form exposes copper or aluminum, insulation, temperature, conductor-count derating, voltage-drop limits, and OCPD choices. The schedule reports conductor ampacity, protection rating, conduit size, and voltage drop; the page also lists conduit fill, disconnect sizing, feeder sizing, and non-motor loads among its functions. Jobs can be saved as JSON or shared by URL, and the PDF export includes NEC reference notes.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue