The Motion Laboratories 1175-01-003-207-0001 is a specialized, custom-configured stringer box or power distribution unit (PDU) engineered for professional entertainment and production power distribution. Its core function is to safely split a high-capacity, three-phase power input into multiple, individually protected lower-capacity circuits suitable for powering lighting fixtures, motorized rigging, and other stage equipment. The unit accepts a primary input via a NEMA L21-30 connector, which is a locking, 30-amp, 120/208-volt, three-phase, four-wire connection commonly found in theatrical and studio power distribution systems. This input power is then distributed and protected through internal circuit breakers to various output connectors, providing organized and safe power access at the point of use on a stage or set.

The specific configuration of this model includes a pass-through output featuring an L21-30 connector, allowing the box to be daisy-chained to additional distribution units downstream. For powering standard 120V equipment, it provides two 20-amp Edison-style duplex outlets (NEMA 5-20R), each protected by its own 20-amp breaker. For higher-power three-phase equipment, it offers three NEMA L6-30 outlets, which are 30-amp, 250-volt, three-phase locking connectors. All breakers are front-accessible for quick reset in the event of an overload, and the unit is constructed in a heavy-duty, road-ready enclosure designed to withstand the physical demands of touring and frequent setup and teardown.

Safety and reliability are paramount in the design. The enclosure is typically made of durable metal with reinforced corners and handles for transport. Internally, wiring follows stringent electrical codes and best practices for entertainment power, ensuring proper grounding and phase separation. Clear labeling and color-coded outlets aid in error-free operation under the often hectic conditions of live production. This stringer box exemplifies professional-grade temporary power distribution, providing a centralized, protected, and flexible solution for delivering clean and reliable power to critical production equipment in theater, concerts, film, and television.