Duplex receptacle
A standard wall outlet with two sockets. The symbol marks where the outlet is on the wall.
Easily confused with
How to read it
NECA 100, the National Electrical Contractors Association's symbol standard, lists it as a duplex convenience receptacle, 20 A, 125 V. The Army's print-reading manual lists it after the single outlet, and its sample electrical plan for a storage area includes duplex wall outlets.
Also searched as: duplex outlet, outlet symbol, power outlet.
This explains what a symbol represents on a drawing. Conventions vary between firms and standards, and a drawing's own legend takes precedence.
Look-alikes
The same symbol with the letters GFCI is a GFCI receptacle.
Differences by country or standard
NECA 100 covers North American symbols only. It does not include the symbols of the International Electrotechnical Commission (IEC).
Read next
- Next in Blueprint symbolsGFCI receptacleAn outlet with built-in protection against electric shock. It is the outlet symbol with the letters GFCI beside it.
- The same shape in African flagsFlag of EthiopiaEthiopia’s flag is green, yellow and red in equal horizontal stripes with a blue disc in the centre holding a yellow star of equal lines with yellow rays. Ethiopia’s Flag Proclamation makes the green labour, fertility and development, the yellow hope, justice and equality, and the red sacrifice and heroism for freedom and equality; the blue disc is peace and the star the unity of Ethiopia’s nations, nationalities and peoples.
More blueprint symbols
The same shape elsewhere
Browse symbols drawn with circles or lines.
Sources
- Symbols for Electrical Construction Drawings, NECA 100-2013 (ANSI), National Electrical Contractors Association (Internet Archive copy), sec. 3.0, symbol 3.002
- Construction Print Reading in the Field, TM 5-704 / AFM 85-27, Departments of the Army and the Air Force, para. 3-27; fig. 3-32
- Engineering Aid 3 (NAVEDTRA 14069), Nonresident training course, April 1995, Naval Education and Training Command (copy hosted by Navy Tribe), Ch. 9, electrical symbols; ch. 10, drawing symbols
Researched, edited and approved by Rory Hansen before publishing. Last reviewed September 24, 2026. How we research
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