Unit c electrical principals & technologies notes(electrical saftey)

1. Electrical Safety

2. Electrical Safety
 No one wants to get shocked, but some
electrical shocks are worse then others.
 Short Circuit: is an unintended path taken
by electricity. Most of the time it is the
path of least resistance.

3. Dangers of Electric Shock
 Voltage vs. Amperage
 High voltage is more dangerous then low voltage 50,000 V are
more likely to kill you then 10 V
 BUT
 Amperage is much more dangerous then voltage. You would feel
0.015A and as little as 0.1A could KILL YOU.
 Insulators like wood, rubber or air make it harder for electrons to
flow through them and so the protect us from shock.

4. 7 steps to Electrical Safety
 1. Keep it dry: Keep electrical devices dry and away from water.
 2. Don’t use damaged electrical devices: Frayed or broken cords are dangerous.
Only use proper plug in outlets.
 3. Unplug: always unplug an electrical device before looking inside or fixing it.
 4. Stay away: Stay away from over-head power lines.
 5. Use safety features: don’t bypass safety features or remove the ground prong
from cords.
 6. Don’t over load: Don’t plug to many things into one outlet.
 7. Pull the plug: When unplugging a device pull the plug at the wall not on the
cord.

5. Electrical Safety Devices
 Grounded 3-prong plugs: The 3rd prong
goes to the ground so the charge will
short circuit to the ground not you.
 Fuses and circuit breakers are safety
devices that break the flow of electrons
through the circuit if the current gets to
high.

6. Dangers of Lightning