Are manufacturer AC cables good enough?

No, that is just a theory of gravity.

That’s what gravity is, the curvature of spacetime due to very heavy objects. It all stems from the General Theory of Relativity.

Oh, I get it, you’re one of those guys who thinks nothing is real, only theoretical. Good grief! You realize they’ve proved this “theory,” don’t you? Or don’t you believe in proof either? 🤗

Other than NGT being a popular scientist but no where near the leading expert, there is a big difference between being able to explain how something works and knowing it exists and being able to observe it's effects or measure them in fine detail. It's the same false argument against evolution, that because we call it a theory, because we don't absolutely know all the mechanisms, that that some how means it "doesn't exist". That is not at all what it means.

djones51, Neil deGrasse Tyson admits that gravity can't be explained! Interesting.....

So in 1969 a phone connection from White House to the Moon surface truly occurred? That must have been an expensive long distance charge!!!!  

No that was fake. The line, One small step for man, one giant leap for mankind, was the idea of Stanley Kubrick’s wife. It was spoken by Neil Armstrong on the unused set of 2001 A Space Odyssey while filming the lunar landing sequences.