Solid core power cords under 300$ - List of manufacturers ?

I saw that silver solid core power cords from crystal cable and cabledyne have no ground wire.  ... 

zuio -  Cabledyne does have a ground wire.  It uses a 3 conductor design.  It is the Inconel sheath that is not grounded.  Don't know about Crystal cable.

http://www.cabledyne.com/premier-silver-mains-cable.html

The Cabledy�ne synergy power cord doesn't.

I saw that silver solid core power cords from crystal cable and cabledyne have no ground wire.
What are the advantages and disadvantages of having no ground cable?

If the piece of equipment, that the power cord will be connected to, requires an equipment grounding conductor then the power cord must have an equipment grounding conductor. (The IEC male inlet on the equipment will have 3 pins. Hot, Neutral, and equipment ground.)

If the piece of equipment is Class ll Listed (Has internal double insulated AC power wiring) and does not use the equipment grounding conductor, (the IEC AC mains inlet connector is only 2 wire), then the power cord, AC plug, and female IEC connector, only needs to be 2 wire.

I thought about DIY too - a CAT7 ethernet cable with 8 22AWG OFC solid core conductors, shielded. They are arranged in 4x 2 twisted pairs. I could use a twisted pair for Live/ground or Neutral/ground and get AWG19 effectively or use the shield as ground conductor and use all wires for live/neutral only and get AWG16 effectively.

You cannot use Ethernet data cable. The voltage rating of the insulation covering the conductors of the wires is not rated for 230V.
Just a guess for your country, Austria, the minimum required voltage rating is 300 volts.
.

A 22AWG neotech hook up wire is rated 600V and 5.4 Ampere. Its not rocketsience. I dont see why a 22 AWG wire should not be sufficient for 240V and 1 Ampere. I know its not rated, but as i am an expat who lives in 3rd world countries I dont have to worry...

"The Cabledyne synergy power cord doesn't."

zuio
Yes it does.  The site description again refers to the sheath which is not connected to earth ground.

I contacted the manufacturer who confirmed that it is a 3 wire design. He has clarified this on the site.