An Electrician must understand Electrical Wiring basics such as the Wire Size, Earthing, Electricity Circuits especially for House Wiring, How To Check Earthing, How a Switch Works, from the Electricity Meter all the way to the Consumer Unit. He must understand the difference between Ground and Earthing.
Is your instant shower head working properly?An instant shower head should be connected in a manner that first, it guarantees the user safety. This shouldn’t be compromised AT ALL!
An earth connection must be secured from the hot shower to the Double pole switch and all the way to the consumer unit. The entire house wiring must have a working earthing system from the electricity meter box to the entire electrical installation.
If this system fails, you risk receiving electric shock when you turn the water tap on or when you touch the switch.
All home appliances will also be at risk of failure if they are not able to safely discharge their electrical charges to the ground.
Appliances that have a metallic surface such as a microwave, a refrigerator, a freezer, an electric cooker, an iron box, a kitchen hood, a dish washer etc must be safely connected with an earth connection.
An extension cord should have a three pin plug for extra protection.
Salty water is even worse if it is not connected properly with the earthing system.