ELECTRIC CIRCUITS

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CHAPTER 7 - SAFETY AND HEALTH AT WORK

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ELECTRIC CIRCUITS

SAFETY

RESIDENTIAL CURRENT DEVICE

SHOULD BE USED IN GARDENS

PRITECTS AGAINST ELECTRICAL SHOCKS

NO PROTECTION AGAINST SHOCKS

MELTS IF CUURENT IS TOO BIG

EARTH LEAD

CURRENT FLOWS STRAIGHT TO EARTH

PROTECTS AGAINST ELECTRICAL SHOCKS

COMPONENTS

DIODE

BULB

RESISTOR

LAWS

KIRCHOFF'S LAW

IT STATES THAT THE SUM OF ALL CURRENTS LEAVING A NODE IN AN ELECTRICAL NETWORK ALWAYS EQUALS TO ZERO.

OHM'S LAW

IT STATES THAT CURRENT IS DIRECTLY PROPORTIONAL TO VOLTAGE AND INVERSELY PROPORTIONAL TO RESISTANCE.

MEASUREMENTS

VOLTAGE

VOLTS

CURRENT

AMMETER

POWER

WALTS

PLUG

LIVE

FUSE

EARTH

GREEN AND YELLOW

NEUTRAL

BLUE

INSULATION