<b>Electrical wiring</b> for a lamp in a 110V network. The lamp is lighting a former stamp-mill now preserved as a workshop. The originally blank wires were insulated by sleeves of tar-soaked cotton and later on plastic-coated. They are kept apart from the wooden framework by doughnut insulators. The devices belong to ‘Tobias trip-hammer’ at Ohrdruf Industrial Hamlet, Thuringia.
<a href="//commons.wikimedia.org/wiki/User:Loracco" title="User:Loracco">Loracco</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>