Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

OL NC

IEEE / ANSI

ANSI/IEEE motor overload trip nc contact symbol

The overload NC contact form is an auxiliary connection linked to the motor overload device. It is read in the control circuit, while overload-sensing elements remain in the motor power path or their documented measurement circuit.

Drawing use: Schematic
Application: Control circuits
Reference family: IEEE / ANSI / Manufacturer
Form evidence: Autodesk IEEE-oriented Motor Control functional form. Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.

A distinction that matters

The overload auxiliary contact does not itself represent the motor's full-current power path.

Full reference

OL NC

Symbols

Motor overload trip NC contact

An overload trip NC contact opens on the documented overload relay operation. It is commonly wired in the motor-control path while the overload sensing elements belong to the power circuit.

Drawing use: Schematic
Application: Control circuits
Reference family: IEC / Manufacturer

A distinction that matters

The auxiliary overload contact interrupts a control path; it does not itself carry the motor feeder current.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.