Right opened <a href="https://en.wikipedia.org/wiki/Junction_box" class="extiw" title="en:Junction box">junction box</a>: connection of wires between power supply <a href="https://en.wikipedia.org/wiki/Electrical_cable" class="extiw" title="en:Electrical cable">cable</a> (left), <a href="https://en.wikipedia.org/wiki/Switch" class="extiw" title="en:Switch">switch</a> cable (bottom) and <a href="https://en.wikipedia.org/wiki/Light_fixture" class="extiw" title="en:Light fixture">lamp</a> cable (right).
<a href="//commons.wikimedia.org/w/index.php?title=User:Maasaak&amp;action=edit&amp;redlink=1" class="new" title="User:Maasaak (page does not exist)">Maasaak</a>
<span class="int-own-work" lang="en">Own work</span>