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C
C CLAMP / C-CLAMP
US equivalent of the UK Hook Clamp. Requires a spanner/wrench to tighten. Known as a PARROT CLAMP in the US film business.
C.C.T.V. / CCTV
Closed Circuit television. A video relay system, used in the theater to give a view of the stage to remote technical operators (especially stage managers). Also used to give musical performers a view of the conductor (and vice versa) to help in keeping time. It's called Closed Circuit because the signal is not being broadcast anywhere - there's a direct link between camera and monitor.
CABLE
- Various types such as control cable, stage cable, multi conductor cable, feeder cable, extension cable, used in connecting devices.
- Common term describing any number of types of electrical connecting devices. All cables employ some type of conductor, usually stranded copper wire, and some type of insulation to protect it. Common cable types related to stage lighting include: stage cable, multi-cable, feeder cable, and control cable.
- Wiring, temporarily rigged, to carry electrical current. Depending on the size of the cable (current carrying capacity), cables are used to supply individual lanterns, whole dimmer racks, or carry signals from a microphone etc.
CABLE GRIP
A U-shaped clip and saddle used for terminating wire rope. Also known as a Bulldog, Dog Grip or Wire Rope Clip.
CABLE TIE
Lockable (and sometimes releasable) plastic strap used to tie a bundle of cables together, amongst many other things.
CAD
Computer-Aided Design. Using a computer to help with 2D plans and drawings, or increasingly for 3D visualisation of how a set will look, and how lighting will affect it.
CALL UP
Activate a cue stored in memory.
CALLING THE SHOW
The process of giving verbal cues to the lighting, sound, fly operators and stage crew during the performance. Usually done from the prompt corner by the DSM or Stage Manager over cans.
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