Slang for Power Distribution Device, or PD. May provide 120 or 208V power and over-current protection for moving lights, audio racks, AV equipment, chain hoists, etc., and output via Socapex, L6-20, L21-30, NEMA 5-15 (Edison) outlets.
Photo courtesy Motion Labs.
In the US, portable power distribution equipment should be built and listed to the UL1640 standard. See also http://www.controlbooth.com/forums/lighting/14550-rack-mounted-voltage-meters.html.
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