DOMESTIC ELECTRICTY
- Created by: 29dalyel17
- Created on: 17-03-21 14:58
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- Domestic Electricity
- AC vs DC
- DC electricity
- DC is when the current flows in one direction
- Batteries power DC
- DC = a wall clock, a televison remote control and an iPod
- AC electricity
- AC is when the current continuously changes direction
- The main electricity supplies AC
- AC = a bedside light, a clock radio and a microwave
- DC electricity
- Plug and fuse
- Earth wire
- Carries current away at low voltages
- Live wire
- Carries current to socket at high voltages and is connected to the fuse
- Neutral wire
- Safety wire carries current to ground if theres a fault
- Earth wire
- MCB vs RCCB
- MCB
- An MCB is a Miniature Circuit Breaker
- An MCB works by breaking the circuit when the current is too high
- Can be reset and they work more quickly/more sensitive than fuses
- RCCB
- RCCB is Residual Current Circuit Breaker
- An RCCB works by switching off the circuit when there is a difference between the currents in the live and neutral wires of the appliance
- RCCBs are more sensitive than MCBs
- MCB
- Fuses
- Wrong fuse
- The wires could overheat and catch fire
- The fuse would keep blowing as the current is too high
- A fuse is a safety device that melts if the current gets too high
- Wrong fuse
- Ring main circuits
- Advantages
- The sockets are in parallel, which means that they are all independent of one another and will each have 230V applied to them
- The cables can be made thinner because there are two paths for the current, so there is a lower current in each wire
- Sockets can be placed anywhere in the loop
- Advantages
- AC vs DC
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