when dealing with the hardware in a computer system, if prevents you from being electricuted, and prevents you from damaging the computer hardware...
the wrist strap will prevent computer components from being damaged by static electricity.
when working around an exposed cathode ray tube
Yes. You should wear one whenever you work inside a computer.
You do not want to wear a wrist strap or be grounded when working on monitors/TVs or power supplies. Even when turned off these devices still hold a charge due to the large capacitors in them.
They should wear it on their left wrist.
You take the wrist strap and look at both ends. One end should have a tinier strap attached to it. You take the tiny strap and look at the back end of the ds. It should have two small holes there. Then take the strap and stick it in one hole. then , push the strap, and it should come out the other hole. Take the strap that came out the hole, and make a loop, by splitting them apart. Slip the actual wrist strap through the loop, and pull it through. Bingo!
Length of wrist strap/Band circumference = 7 inches.
The wrist strap is used to prevent static charge buildup, which can arc from you to the PC, and potentially cause damage. Because of this, there is no time when you should NOT wear a wrist strap. It may not be needed at all times, but it certainly doesn't cause an issue if you do. I do not always use this; when it is warm and damp, static charge buildup is less of a problem. Also, if you are working in an area away from things that naturally help build up charge on your person (shag carpet, wool,...), it because less of an issue. But there is always some level of risk involved when working inside a computer and not having this.
To the computer metal case, or you can buy a wireless anti-static wrist band.
OKay I found out, it is left wrist
Jewelry and Antistatic wrist strap
resistors