Page 109 - Physics 10_Float

CURRENT ELECTRICITY

separate connection is taken from the livewire of each
appliance. The terminal of the appliance is connected to
the livewire through a separate fuse and a switch. If the
fuse of one appliance burns out, it does not affect the
other appliances.
L
N
E
To one room
L
N
To other room E

L

L N N N
N S
E E E E
Electric meter L L
Distribution board R
S S
L (Live) _____ E (Earth) – - –

N (Neutral — — – F – Fuse Fan
Socket
outlet Bulb
Fig.14.16: Wiring system of household electricity
In house wiring, all appliances are connected in parallel with each
other. This means they all get the full mains voltage and one can
turn ON any appliance without having to turn ON another.

14.13 HAZARDS OF ELECTRICITY

While electricity has become part and parcel of our lives, care For your information
should be taken to save ourselves from its hazardous effects. Livewire
Voltage of 50 V and current of 50 mA can be fatal. Major dangers Earthwire
Neutral Fuse
of electricity are electric shock and fire. Here we discuss some Wire
faults in electrical circuits that may cause electricity hazards.
Outer
Insulation Damage insulation Cable grip
This is the correct way of wiring
All electrical wires are well insulated with some plastic cover of a three pin main plug. Put
for the purpose of safety. But when electrical current exceeds everything in proper place.
the rated current carrying capacity of the conductor, it can Fuse is placed for safety
purpose. In case of excess
produce excess current that can damage insulation due to
current, it will burn out and will
overheating of cables. This results into a short circuit which break the circuit.

Not For Sale – PESRP 109