It is best to have it plugged up and unplug the power connector off the motherboard.
Do i need a anti static building mat and wristband.
This is an elastic band made of conductive fiber such as carbon or carbon filled rubber that are bounded on the hand with a stainless steel plate or clasp.
Here are some more details about anti static wristband.
By redirecting the static these wristband devices assist in properly grounding your body balancing out any electrical charge differences between you and electrical parts.
I am very careful though and a perfectionist so i handle each piece.
I am a field tech and have never carried around a mat or strap.
There s pretty much no reason not to own one.
Unless 30 40 is really gonna cause some problems you might as well own one.
Just take the other necessary precautions.
The difference between using grounding cables separate for a mat or wrist strap as opposed to a common point ground is primarily ergonomic.
I wear one on my ankle.
I alwyas build mine on the carpet floor while sitting down and i never use an anti static wristband even though i know i should.
Make sure you have one hand or your forearm touching some metal part of the case while working.
They are normally used along with an antistatic mat that are placed on the working bench.
You do not need an anti static mat or wrist strap.
You can buy mat spray and take care of it and use the same one for pretty much the rest of your life.
However having the mat and the wrist strap grounded at the same point does keep them in electrical balance.