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Definition
| A batten with electrical power and something hung on it |
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| An electric that hangs over the audience |
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| The electrics over the apron or pit |
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| Electrics and Booms are numbered from _____________ to ______________ . |
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Definition
| Electrics and Booms are numbered from downstage to upstage. |
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Definition
| supported from the ground |
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Definition
| Boom or laddar in the slots in the side walls of the theatre |
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| Standard SCR Remote Control System |
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Definition
Power->Dimmer ->Patch Pannel->Circuits->Instruments
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Control Board |
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Definition
| An electrical path through which electricity can flow |
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Definition
| A device that controls the intensity of light |
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Definition
| a single cable that consists of multiple extension cables |
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Definition
| an interconnecting device that provides the system with the capability of connecting, or patching any stage circuit into any dimmer |
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Definition
| Energy produced by the flow of electrons |
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Definition
| like charges repel, and unlike charges attract |
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Definition
| material that readily releases electrons |
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Definition
| material that doesn't readily attract electrons |
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Definition
| the difference in electrical charge between two bodies. Potential is measured in Volts. |
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Definition
| The flow or movement of electrons through a conductor |
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Definition
| The unit of measurement of electrical current |
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Term
| Compare Voltage to water in a pipe |
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Definition
Voltage is analogous to the pressure of water flowing in a pipe
The quantity of water flowing is comparable to the current (amperes)
The friction between water and the pipe is similar to the electrical resistance (ohms) |
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Term
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Definition
| The flow of electrons in one direction. DC current cannot be transmitted over long distance without severe loss of voltage |
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Definition
| The flow of electrons is reversed on a periodic basis. AC current can be transmitted over long distances. |
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Term
| USA uses what standard voltage? (Wasn't sure how to word this one...) |
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Definition
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| Most of the world outside the USA uses what voltage? |
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Definition
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Term
| All electrical systems must have a __________, a ________, and a __________. |
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Definition
| All electrical systems must have a source, a load, and a circuit. |
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Definition
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Term
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Definition
| In a typical application used in stage lighting, a control device (switch, dimmer, fuse, circuit breaker) is used in series with the lamps wired in parallel |
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Definition
| A device to protect a circuit from an overload; has a soft metal strip that melts, breaking circuit continuity |
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Term
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Definition
| a device to protect a circuit from and overload; has a bi-metal device that trips oven when heated by excess current, breaking circuit continuity |
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Definition
| As voltage increases, current increases; as resistance increases |
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Term
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Definition
E=IR
E=Voltage in Volts
R=Resistance in Ohms
I=Current in Amperes
This formula is useful in working with Low-Voltage systems. |
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Term
| Power Calculation Formulas (There are two) |
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Definition
1. P=IE
P= Power in watts
I= Current in amperes
E= Voltage in volts
2. W=VA
W= Power in watts
V=Voltage in Volts
A= Current in amperes |
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Term
Wire Gauge
(Size # compared to amps capacity) |
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Definition
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Term
| The __________ the cable, the _________ amps it can carry. |
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Definition
| The fatter the cable, the more amps it can carry. |
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Term
| Explain what "12-2" would mean in terms of wire. |
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Definition
| "12-2" first describes the thickness of the wire, being 12-gauge wire. The "2" says there are 2 service wires inside. That is a hot(black) wire and a neutral(white) wire. |
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Term
| Explain what "12-3" means in terms of wire. |
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Definition
| "12-3" says there is three wires in there. There is an extra hot (red) wire for three-way switches. |
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Term
| Two-wire single-phase 120-VAC system |
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Definition
| The Voltage potential between hot and neutral is 120V |
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Term
| Three-wire single-phase 120/240-VAC system |
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Definition
The voltage potential between either of the two hot wires and the neutral is 120V
The voltage potential between the two hot wires will range between 220-240V
Some appliances require like clothes dryers and water heaters require 240V |
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Term
| Four-wire three-phase 120/208-VAC system |
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Definition
The voltage between the neutral and any of the three hot lines will be 120V
The current in each hot line is alternating on a different time phase from the other two
The voltage between any of the two hot wires will measure 208V |
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