AC Power cable for ARC Ref 5 se.

Beware the hype and use a rifle approach instead of a shotgun approach here..... Power cords are not tone controls.... they allow the gear to run and hopefully at their peak performance.

In the the same vein, $$ for 3rd party cords are no pathway to assurance for audio performance improvements..even in hi-fi hi-end build components. Simlarly to dramatize the opposite end of the spectrum , don’t expect much for anybody considering plunking in an comparatively expensive cord in a mid-fi piece in expectation of a higher road to audio OZ. (Latter does not apply to you in your OP posted gear...)

(1) There is no silver bullet answer here; it is ENTIRELY system dependent, so it is impossible for any 3rd party to blindly offer up anything more than their anecdotal and heavily biased personal faves that have nil assurances that they will actually work well in YOUR system.

(2) Without prejudice to (1), Swapping in a third party power cord MIGHT (emphasis added) improve your audio performance...there is no guarantee nor absolutes here.

(3) Similarly, it MIGHT (again, emphasis added....) either

(a) change your audio performance negatively if you choose the wrong one from a sea of contenders and pretenders; or

(b) have minimal to nil improvements;

in which case you just wasted your money.

YOUR TAKEAWAY: Trial and error....full stop. Until you actually swap-in and swap-out to assess it in YOUR own system, you ain’t gonna know .....full stop.

FUSES: Beware the noise and anecdotal hype .... they are not tone controls in the first part, and largely benign to tweaking anyway.
ditto to the above intuitively BUT not recommended to blindly farce around with them for fear of safety or damaging your gear.
If its still under warranty, then anything other than OEM spec will void that warranty.

akg_ca I see your points , i guess it would be wise to do a comparison test with 3 rd party power cords compared to the stock. And as far as fuses i would not to do anything to void the warranty. 

If you want to try a different power cord I would suggest the Cerious Technologies Matrix Power Cord. I've been impressed with this power cord and I've talked with several audiophiles the report very good results using it on ARC products. There is a trial period (see the website for details) and it could be returned for a refund if you are not happy with it.
Perhaps you could demo a few power cords at the same time that have a return policy, then all you need to be conserded about is the break-in time.

 Power cords known to work well with ARC geare are Sain Line, Shunyata, and Synergestic Research. I have heard good things about Wireworld and Transparent but don't know anyone who uses them. ARC uses Sain Line and Shunyata power cords and cables in their listening rooms. They also use Shunyata VTX internally in thier Reference gear.

 I chose Shunyata Alpha HC for my ARC gear. But that was a few years ago. Sane Line was slightly better but much more expensive. I have had both ARC Litz cable and Synergistic Research in the past.

To @lostbears list I would also add AudioQuest -- my primary ARC dealer (Optimal Enhancement) always gets great results combining ARC amps with the latest AQ cables and I'd imagine the Storm series would be a great match -- I currently use AQ WEL on my Ref 2SE Phono and SR Galileo LE on my Ref 40