- It is sub-atomic particles (electrons) flowing in a conductive material.
- It is invisible it has no smell and it can kill.
- It forms the backbone of modern industrial society and probably will do for some time to come.
- It powers our I-phones, the internet and it makes our homes comfortable with heat, light and entertainment.
- It is used in our factories, vehicles, transport systems and hospitals in every corner of the planet and beyond.
- Homes use 240 volts of alternating current.
- Cars are started with 12 volts of direct current.
- None of the conductors should be exposed. This means that mechanical protection must be provided (switch covers and socket plates etc.). Every electrician is responsible for ensuring that the installation passes the “British Standard Finger Test”. It must not be possible to insert anything into any enclosure and touch a live conductor.
- Secondly all devices lights, sockets, appliances etc. must be sufficiently protected against any external part becoming live.
(updated 11/12/2015) "Don't need to change anything here electrons are still electrons and safety is still the main thing" There have been a few challenges from electricians wanting to bury SWA Armour (steel wired armoured cable) at high cost to the client but I assume by now no-one else wants to challenge me on this. SWA is safe above ground or below ground that is all. I think the comments are good enough - it's still a boring subject but safety sometimes is - it doesn't make it less important because safety remains VITAL.
Both go to the same place but earthing is done for the protection of humans and neutral takes back the electron count. So when you switch on a light the electrons used are is counted by the meter so you must pay. If you send it back down the earth the light will still come on but you may may pay with your life as correct earthing is a life saver.