[Amps] 230 v wiring

Tom W8JI w8ji at w8ji.com
Wed Apr 25 17:10:06 EDT 2007


If we measure 5-6 volts on a typical meter on a 240 V line 
it is more like 8-25 volts drop (3-11%) drop so far as a 
capacitor input supply is concerned.

This is because the rectifiers only load the supply for a 
fraction of each cycle. A typical 1500 watt amplifier with 
good transformer on a reasonably stiff line draws about 
45-50 amps peak current on each half- cycle with a 240V 
line, but only about 12.5 amps average current.

73 Tom






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