Is it worth using an Anticable level 5 for a PHONO PREAMP? Overkill?

Common sense and first listen, would suggest that this may be an overkill, but you may also find out that after many hours of use it is not the case. It depends, while personally i would go 14awg for a phono stage, others would prefer a lighter awg but that's normal too. Whatever you do leave it for a while, then you can be sure.

 I had the opportunity to get one of these 8 AWG from a friend, so I was wondering if there could be any negative effect given the unnecessary gauge. 

No! 😎

Mike

I'm a cable guy but not sure about power cables. I have used some budget (but nice) power cords but never did a real listening evaluation with them. My hearing doesn't allow me to discretion I used to have. So, I'm out of the loop now. 

Thanks for coherent answer @mulveling. That is all I needed. The rest of the usual cable bashing type of responses is indeed absolutely tiring. If I am in an audiophile forum and I am asking about this specific case, is because I DO believe in cables. And every single time I have upgraded cables in my system, I have heard a clear difference.  I had the opportunity to get one of these 8 AWG from a friend, so I was wondering if there could be any negative effect given the unnecessary gauge.  That is all.     So let's focus on answering questions, rather than telling posters cables are for ignorant people.  Just move on.... lots of time in your hands it seems... 

Funny how it's only a "closed mind" if someone has a different opinion, formed through experience. It's almost like the poster has a.....closed mind....

I don't mind if your experience tells you that all you need is lamp cord. Knock yourself out. But don't profess to tell me that that's all I need.

Not to be "bashing" cables, but lets's address the OP's question.  Is it worth spending money on a high end 8 AWG power cable to feed his Parasound JC3+ phonoo pre amp (the same unit I have in my system).  The specs show the power draw by the JC3+ are +/- 0.1 amps.  Feeding with a cable rated to carry 30 amps, or 300 times the power required, could only be a giant waste of money.  Open mind, closed mind, doesn't change the math.  Amazed how often this same question gets kicked around on this forum.  

All this talk about "closed minds" but in this case OP asked a specific question that was NOT "convince me expensive power cables are stupid". Agree with @ozzy62 the usual cable bashing is tiring. 

Funny how it's only a "closed mind" if someone has a different opinion, formed through experience. It's almost like the poster has a.....closed mind....

As if on cue, the usual suspects feel it's absolutely necessary to make an appearance to alert all viewers of this thread how foolish it is to believe that cables make an improvement in an audio system. One thing's for sure, their reliability is only challenged by their closed minds.

8 AWG is way overkill!

What AWG used inside the wall? 🤔

@bigtwin : +1!  Power cords are just another way to get the gullible to spend more money! Ditto for power conditioners.

Thanks @mulveling , that helps a lot! 

Have another glass of Kool-Aid.  

8 AWG is a bit overkill for a phono stage, yes. That doesn't mean that it won't sound good, or that you won't like the effect.

Phono stages have an absolutely constant power draw (unlike power amps) so you don't need "uncompressed power delivery" either. For example, Audioquest splits their top cords into high-current, large gauge versions and smaller-gauge source versions for this reason. So instead of buying a massive gauge that's not needed for the application, you can move up the line into a smaller gauge that uses higher quality metals. 

*level 3 / POWER CABLE