अस्थायी प्रतिष्ठानों (temporary installations) के लिए किस प्रकार की वायरिंग को सबसे अधिक प्राथमिकता दी जाती है?

Which system of internal wiring operates such that illuminating one light automatically switches off the previous light as a person advances through rooms?

A diagram that shows the actual physical connections and layout of components like lamp-holders, lamps, and two-way switches in an electrical circuit is called a _____.