electech,
Can you save some money with better connections? Of course the answer is yes, but no where near the 15% to 20% that they are claiming. In your example with the 30 amp load and assuming that it is only a 120 volt circuit, the total load would be 3600 watts, you are saving 4.5 watts or 0.125%. That is a savings that is more than 100 times less than what is claimed for this product. I would also be surprised if a good connection had more resistance than a foot or two of the wire that is being connected. In this case, assuming a #10 conductor, I would expect that the connection resistance would be 0.001 to 0.002 ohms.
Don
