Understand the difference.

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

FBMI

Symbols

Feeder backfeed monitoring interface

Monitors the condition in which an outgoing circuit can energize its supplying bus. A source and bus arrangement shows how incoming supplies and outgoing circuits can be connected. Breaker and tie positions determine which sections are energized and whether sources can become electrically paralleled.

Drawing use

Schematic

Application

Control circuits

Reference family

Manufacturer

A distinction that matters

Normal load flow does not rule out another source. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.

Full referenceAdd to legend

Bus

Symbols

Busbar

A busbar connects multiple power circuits to a common electrical node. In an SLD it is commonly represented as a line with feeder connections. The representation describes connectivity; physical conductor dimensions, enclosure, phase arrangement and current-carrying capabilities are separate equipment information.

Drawing use

SLD / Schematic

Application

Power distribution

Reference family

IEC / IEEE / ANSI

A distinction that matters

A busbar is an electrical connection. Busbar trunking is a physical distribution system with model-specific enclosures and fittings.

Full referenceAdd to legend

Follow the full entry for source drawings and the appropriate standard or selected product. Equipment previews show a manufacturer drawing where available, otherwise a 3D thumbnail.