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Electricity and the devices that carry it.
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POWER
Electricity and the devices that carry it.
Rules of Lighting Design Law of Reflection Law of Refraction Inverse Square Law POWER FORMULA
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Electricity
Electricity Watts -- Measurement of power
required to do work We often measure the amount
of Electricity we use in watts. Amps (Amperes) –
Measurement of the flow of electrons (capacity)
Volts –Measurement of electrical potential (push)
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Electricity
Power Formula Is: P= IE But my favorite is: W=VA Watts = Volts(Amps)
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Electricity
Amperage is the measurement of electrical flow and is dictated by the capacity of the electrical devices we use.
Everything has a capacity.
Dimmers, Lights, Lamps, And . . .
CABLE!!!
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Electricity
Cable Gage is Very Important. We use 12 Gage Cable in the
Theatre. It’s actually 12/3 cable. (that’s 12 gage, 3 wire) 12 Gage has a capacity of 20A Other gages have other capacities
(there’s a chart on page 81 of your book).
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Stage Pin Connectors
Hot = or Red Neutral = White Ground = Green
http://www.d.umn.edu/~mharvey/th1501connectors.html
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Electricity
So using this formula, let’s calculate some situations.
How Many Cables? How many 12/3 Cables do you need
to connect the following lamps? 3 – 1000w (or 1K) 5 – 750w 2 – 500w 3 – 250w Please show your work!
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How Many Cables?
How many 12/3 Cables do you need to connect the following lamps?
2– 1000w (or 1K) 3 – 750w 5– 500w 3 – 250w 6 – 100w Please show your work!