O'Reilly logo

Concert Sound and Lighting Systems, 3rd Edition by John Vasey

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

CHAPTER 2

POWER

Power must be treated with care to avoid accidents and blown fuses. A licensed electrician should connect the power to the supply.

Available power varies among countries, but it is generally a three-phase, four-wire, 50/60 cycles per second (Hz) alternating current (AC) system. Three cables carry 240/120 V, and one neutral cable has no voltage. The supply voltage is 120 V/60 Hz in the United States, 220 V/50 Hz in Europe, and 240 V/50 Hz in the United Kingdom, Australia, and New Zealand.

AC means that the voltage varies between +240/120 and –240/120 V at 50/60 times per second (50/60 Hz) (Figure 2–1).

The power source must be checked for fuse value and location. The amount of power required by the sound system depends on the ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required