I apologize for going off subject in this posting.
I am only following up from "RR_Mel" last posting.
Hello; "RR_Mel"
Lets agree not to agree.
You mentioned your past history being an electrical engineer. At one time I was a special projects manufacturing engineer, doing modifications to the F-15 jet fighter.
The original Euro wire terminals are manufactured in Europe with specific approved required electrical standards. This included maximum and minimum wire sizes. The much cheaper Euro (type) wire terminals are all made in China without any required electrical standards. There are no actual approved electrical maximum and minimum wire size standards.
There may/will be problems if you use #12AWG (.08" Dia.) and #22AWG (.025" Dia.) in a larger size Euro (type) wire terminal. This product is made from ABS plastic (not electrically approved). The Euro (type) wire connector is "Not" a cage clamp. It uses a screw clamp. The flat bottom screw tightens against the top of the wire. There will always be a small gap between the flat bottom screw and the bottom round contact surface.
How much will a small #AWG wire compress under these conditions?
Wire Clamping Screw Gap:

Here is an example of an original Euro wire terminal manufactured in Europe. Made from POLYAMIDE 6 (electrically approved). Take special note that there is a soft brass plate under the clamping screw, to form to the round electrical contact surface, to act like a cage clamp.
Original Euro Wire Connector:

UL (safety organization) Electrically Approved

Only a suggestion. I would not recommend using these cheap, electrically unsafe, China made, Euro (type) wire terminals for high amperage usage.
Especially when it comes to the main power supply 115.VAC / 15.AMP power supply to the model train layout. This would also include DCC usage where there are 5.Amp and 10.Amp boosters. There are also 5.Amp and 10.Amp DCC power supplies.