Technical Sourcebook
Field-oriented guides on industrial motor control, wiring standards, and electrical theory. Each entry is paired with a simulator for hands-on practice of the concepts.
3-Wire Motor Control Circuit Explained
Understand how the 3-wire start/stop motor control circuit works — seal-in logic, current flow in every state, and why it's the foundation of industrial motor control.
How to Wire a Motor Starter: Complete Guide
Learn how to wire a 3-phase motor starter from scratch — power circuit, control circuit, seal-in contacts, and overload protection. Step-by-step with diagrams.
What's Already Wired Inside Your Motor Starter
Understand the factory prewiring in NEMA vs. IEC motor starters. Learn which jumpers come pre-installed and how they simplify field wiring for electricians.
NEMA vs IEC: Two Standards for Overload Relay Contact Placement
The normally-closed 95-96 contact on every overload relay protects the coil circuit — but where it sits depends on which standard the equipment follows. A comparison of NEMA return-side and IEC hot-side placement conventions.
Motor Control Simulator: Practice Wiring Online Free
Practice wiring industrial motor control circuits in a free browser-based simulator. Drag wires, operate pushbuttons, measure voltages, and troubleshoot faults — no software to install.
Manual Operators in Motor Starters
Use a motor starter manual operator to split control faults from power faults while keeping overload, HOA, jog, and hoist limits straight.