Lighting. An array of male connectors (almost exclusively 2P&G-20A regardless of what the venue uses) connected to circuits downstage of the proscenium (Coves, Balcony Rail, Box Booms, etc.) in a "road house" to allow touring dimmers to control fixtures in these locations. These circuits must have independent over-current protection [NEC Article 520.50C: Road Show Connection Panel (A Type of Patch Panel)], as they constitute permanent building wiring.
With the advent of DMX and associated distribution devices (splitters, combiners, routers, and what not) and control over Ethernet, today it is more common for a "road console" to control the venue's dimmers that service these remote locations.
With the advent of DMX and associated distribution devices (splitters, combiners, routers, and what not) and control over Ethernet, today it is more common for a "road console" to control the venue's dimmers that service these remote locations.