power cord directionality

@ jw944ts It sounds like you don't trust the assembler of your cable to correct the mistake if you send it back, that they will try to "fool" you.  Nevertheless, I think you should discuss it with them and send it to them if they agree.

I am curious that you would mention your cable directionality may have been labeled wrong.  Any cable with directionality indicators I have owned the directionality indicators were imprinted on the cable along with manufacturer, gauge, etc.  How could it have been labeled wrong, was it just an arrow on piece of paper stuck onto the wire?

@geoffkait 
It is uncontroversial that the structure of wire is impacted during the extruding process to create the various gauges.

What is not so clear is how this impact on the wire during the process of making its gauge can actually change the sound coming though the cable.  Can you shed a little light on this? 

That is the exact question I’ve been asking on many different threads here for a very long time for the last few years. No one seems to know, or if they do they’re not sharing. It’s similar to the question, why does the effect of vibration on cables and wire like tonearm wire change the sound? It has to do of course with what is the “audio signal” through wire and how does the signal become distorted? I have even offered prizes to the winner. Share, share!

@optimize please reD my posts again..this is a custom umbilical btwn power supply and preamp..
@jetter as this is a custom job, the directionality  is indeed indicated by a label placed on the cord. 

Further follow up for those interested....here is the explanation of how the umbilical is electrically tested, so it couldn’t be backwards, just accidentally labeled backwards...

Three aspects establish the directionality of my designs.   The aspect I refer to that is electrically testable is a bonding test, an in-process electrical test whereby electrical continuity is verified of the internal shielding within the outer conduit to the metal shell of the connector on the power supply end of the cable.  In my designs the internal shield systems of the cable are drained (wired) only to the power supply end for reasons of increasing performance by enabling any electrical noise absorbed by the shields to be transferred harmlessly away from the music (away from the main preamp chassis). Secondly, and equally crucially, directionality is also established by paying regard to the directionality indicated by the manufacturer of the raw bare conductor. This directionality is stringently retained throughout the assembly process.  Finally, the audiodharma Cable Cooker has a directionality of its output signal, and the connections on the Cooker are marked respectively.  
Thx for those that have been interested 
j