To instantly trip and disconnect power within milliseconds when tiny current leakage (electrocution risk) is detected To increase the brightness of light bulbs To reduce electricity bill consumption To protect against water pipe leaks

Switch off the main power supply or isolate the victim using a dry non-conductive wooden/plastic stick Grab the victim with bare hands to pull them away Pour a bucket of water on the electrical wire Touch the victim to check their pulse

The lethal voltage difference between a person’s two feet created by current dispersing into the earth The height of an electrical pole The weight of the power cable The speed of electrical current

Keep both feet together and hop/shuffle away without lifting your feet high until at least 15–20 meters clear Run as fast as possible with long strides Crawl on your stomach Sit down on the wet grass

To contain any internal electrical spark within the casing and prevent igniting surrounding flammable vapors To keep the machinery cool in summer To make the equipment lighter in weight To reduce motor sound