SOn
Multiple socket outlet
Plan mark for a group of socket outlets on one plate, shown by a gang number or stacked outlet strokes.
IEC
IEC · FB
Floor box outlet
Plan mark for a flush floor box containing power and often data outlets in open-plan floors.
In plain English
What does Floor box outlet mean?
A floor box houses socket outlets and frequently data outlets below a hinged lid flush with the finished floor. Plans draw a square around the outlet mark, sometimes with a diagonal or the letters FB, and list the box contents in a schedule because each box can hold several accessory types.
A simple example
Floor boxes are used in open offices, meeting rooms and lobbies where furniture is away from walls. They require coordination with the floor finish, raised-floor tiles or screed thickness, so the symbol is often cross-referenced to an architectural floor setting-out plan.
What the drawings help you do
The square does not tell you how many outlets the box contains. Read the floor box schedule for power, data and AV contents and the circuit allocation of each power outlet.
This particular reference
Plan mark for a flush floor box containing power and often data outlets in open-plan floors. A multiple socket outlet on a wall shows a gang count; a floor box is an enclosure whose contents are scheduled separately.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: IEC graphical symbols for diagrams · Electrical installation design methodology and references
IEC · Floor outlet
IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
GA · FB
What it represents
A floor box houses socket outlets and frequently data outlets below a hinged lid flush with the finished floor. Plans draw a square around the outlet mark, sometimes with a diagonal or the letters FB, and list the box contents in a schedule because each box can hold several accessory types.
Floor boxes are used in open offices, meeting rooms and lobbies where furniture is away from walls. They require coordination with the floor finish, raised-floor tiles or screed thickness, so the symbol is often cross-referenced to an architectural floor setting-out plan.
The square does not tell you how many outlets the box contains. Read the floor box schedule for power, data and AV contents and the circuit allocation of each power outlet.
How to read it
- The square outline around the outlet is the usual floor indication.
- Expect a schedule listing box contents.
Information to show or reference
- Reference the floor box schedule entry.
- Coordinate setting out with the floor plan grid.
- Tag power circuits and data outlet numbers.
A distinction that matters
A multiple socket outlet on a wall shows a gang count; a floor box is an enclosure whose contents are scheduled separately.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
IEC graphical symbols for diagrams
IEC committee context for graphical symbols used in diagrams and installation documents; not a source of reproduced artwork.
Electrical installation design methodology and references
Installation design methodology context: circuits, outlets and final distribution are planned before symbols are placed.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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