The video creator tested a "suicide shower" (a showerhead that heats water with live wires) to see if it's safe. The showerhead has exposed heating elements and draws 50 amps, but it also has a grounded wire that may prevent electrocution. The creator installed the showerhead and measured the current and voltage to see if it would trip a GFCI outlet. The results showed that the showerhead is relatively safe, but only if installed correctly and with proper grounding. If not, it can still be dangerous. The creator also demonstrated that the showerhead can still be safe even with loose wires, but it's still a fire hazard. The video ends with the creator giving away 10 handheld oscilloscopes, which were provided by Circuit Specialists, to his patrons and viewers.
Here are the key facts from the text:
1. The video discusses the safety of "suicide showers", also known as electric showerheads.
2. Millions of people in Brazil use these showerheads without problems.
3. The showerhead has two bare heating elements that are completely exposed to running water.
4. The heating elements are powered only when there is running water, due to a diaphragm that switches the contacts on.
5. The showerhead draws 50 amps max.
6. The ground wire goes into the middle of the diaphragm to ground the water at the output and also goes straight into the input water.
7. The showerhead's structure is designed to remove charges from the water before it exits.
8. The heating elements can be isolated from live wires, making it safe to touch.
9. The showerhead runs on 240 volt AC and is safe to touch when turned on.
10. The handheld oscilloscope used in the video is a 70 MHz, 2-channel oscilloscope with a 25 MHz function generator and a complete digital multimeter.
11. The oscilloscope is powered by a battery or isolated USB power, making it completely isolated from live wires.
12. The showerhead's current draw depends on the quality of the water and the voltage.
13. In some countries, people disconnect the ground wire to make the showerhead work, which makes it more dangerous.
14. The GFCI outlet prevents the user from getting a shock.
15. The current flowing through the ground wire is around 0.8 milliamps, which is not enough to trip the GFCI.
16. The AC voltage between the water and the faucet is around 7 volts AC when the showerhead is on.
17. When the user's body is parallel to the water, the voltage drops to around 0.7 volts.
18. The showerhead is not suitable for countries with 240 volt AC and more impure water.
19. The user should ensure that the house wiring is rated for 50 amps to prevent a fire hazard.
20. The showerhead is not suitable for people who may not connect the ground wire properly.