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

An insulated single stand of copper wire is considered a solid wire regardless of its’ wire gauge.

Example.

Insulated solid wire.
https://www.digikey.com/catalog/en/partgroup/solid-hook-up-wire/1915
.

Insulated stranded wire.
https://www.digikey.com/catalog/en/partgroup/ecowire-plus-series/1912

An insulated stranded wire/conductor is multi stands of bare single strands of wire grouped together under a common insulation covering.

billshenefelt
Usually only wire under 18 gauge max diameter is solid. Heavier that that in a solid wire is likely fixed location like hookup wire in a circuit or fixed AC wiring in your wall. Many cable outfits call things solid copper core, meaning it is copper not an alloy, but not single strands of a heavy wire gauge.

Come again? 😳

Nice to see a thread about solid core conductor power cords - I find they make a worthwhile difference compared to stranded conductors, insofar I'm able to tell with the testing and comparisons I've done. Mine are DIY 12/15AWG installation wires bought at the local "Home Depot"-style warehouse (Bauhaus). I stripped the individual (and insulated) solid core wires from the outer sleeves, and then twisted the lead and return wires with some 3 twists per 4" (ground wire, where it may be used, is twisted in the opposite direction), and terminated each end with IeGO 8055 pure copper connectors. The twisting itself should act as a mild electrical shield, and I use no further insulation or shielding. The installation wires are quite cheap (usually sold with 3 or 5 conductors under two outer sleeves), but use high quality, very pure copper - at least here in Denmark, but I suspect the same applies in other countries. I wanted to avoid alloys in the connectors, and therefore opted for the IeGO pure copper plugs both for the wall outlet and components. The sound through my setup with these power cords seems dynamically uninhibited, pure and with very little inherent signature. Try them out cheaply without dedicated connectors to begin with, and see whether they're to your liking. 

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?

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.

Any recommendation?

My components draw less than 1 Ampere only and I would use that wire only for the low power components. For the power cord that feeds the distributor block i would use a 13AWG Audioquest NRG-2.

This is the cable description :
http://shop.sommercable.com/en/Cables/Bulk-Cables-Fiber-LAN-CAT/Cat-7a-SC-MERCATOR-CAT-7a-CPR-Versio...
And the picture:
https://www.ebay.at/itm/Sommer-Cable-580-0417F-SC-MERCATOR-CAT-7a-Fiber-LAN-CAT-Cable-Computer-Medie...

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