# plug (electrical)

A device made to be in a hole of another device, so that through touch energy can flow between the two.

- Computed level: L8 (depth in the emergence graph, not abstraction)
- Status: published  ·  Domain: technology  ·  Arena: E7

## Emergence
**Emerges from:** [device](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-device.tool), [holes](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-holes.empty-regions), [touch](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-touch.together), [flow](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-flow.movement), [energy](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-energy.capacity), [make](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-make.verb)

**Through:** A shaped device meets a matching hole; their boundaries touch, opening a path through which energy flows.

**Novel properties:**
- continuous energy conduction
- interlock without adhesion
- structured alignment enabling flow

## Examples
- The USB-C plug connects a MacBook charger to a power brick, enabling energy transfer at 100 watts. *(everyday life)*
- Apollo 13's crew used a makeshift adapter to plug a square carbon dioxide filter into a round hole. *(engineering)*
- The IEC 60906-1 standard defines the plug dimensions used in Brazil's electrical outlets. *(institutions)*

## Used by
- [socket](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-socket.electrical) (L9)

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-plug.electrical*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-plug.electrical.json*  
*Every definition provably resolves to space, time, energy and pattern.*