Tie-In

Technical Details

Standard tie-ins are via 230V/16A domestic connections (3.7 kW) or 400V/32A three-phase connections (22 kW). Professional sets often utilize 400V/63A CEE connectors (44 kW) or 125A Camlock connectors (86 kW). Protection is provided by RCDs (30mA) and circuit breakers. Voltage drop over long cable runs necessitates cable cross-sections of at least 2.5mm² (16A) up to 35mm² (125A). Mobile distribution boxes with integrated safety circuits allow for distribution to multiple lighting circuits.

History & Development

Systematic tie-ins became established in the 1960s with the standardization of CEE connectors by IEC 60309. Prior to this, proprietary connection systems from individual manufacturers dominated. In 1973, the introduction of RCDs led to increased safety on set. Modern LED lighting since 2010 has reduced power consumption by up to 80% compared to halogen Fresnel lights, making smaller power connections sufficient.

Practical Application in Film

Studio shoots use permanently installed 400V connections with up to 200A protection. Location shoots rely on existing domestic connections – an average 4-person household has 40A protection (27 kW). For "The Grand Budapest Hotel" (2014), cinematographer Robert Yeoman powered the hotel lobby lighting directly from the building's grid, thus avoiding generator noise. Night shoots with HMI lights (2.5-18 kW) often require temporary high-current connections via construction power distribution units.

Comparison & Alternatives

Compared to generators, tie-ins eliminate fuel costs and noise pollution but limit location choices to those near a power source. Battery systems like the Anton Bauer Titon (240 Wh) are suitable for LED panels up to 50W but cannot match the light output of mains-powered 2.5kW HMI lights. Hybrid solutions combine tie-ins with UPS (Uninterruptible Power Supply) systems for critical scenes. Generator use remains the only option for remote locations or power requirements exceeding 100 kW.