Dedicated AC line - Contractor wants to use BX instead of romex

@ngiordano seriously? Wow... got nothin’.

I was only joking about the 50k . For starters the best thing if your swapping your panel out is get the panel with the silver plated buss then run a dedicated 20A thats 10/2 or 2 , when I ran my dedicated outlet since I was running 1 I just ran 2 so i have 1 20a for my surge and another for my Subs I have dual subs  so im using both outlets for the subs , overkill I know but , before I did all this I got major sag on the line lights were dimming bad so I knew I needed a dedicated outlet . and the first outlet that has the surge protector on it the second outlet I have a IFI AC purifier in it so all 4 outlets  are being used 

@johnspain:  Thank you for the link.  It explains the differences in language that is easy for a novice to understand. 

Before you get into an argument with your contractor you might want to look up the code in your area for what is required to pass inspection. Example in Chicago area almost all electrical wire must be contained in conduit. If there is no code restriction tell him or her what you want and if they won’t go elsewhere.

If you're going to run a dedicated run for power, I'd suggest investing in a good hospital grade outlet at the very least (superior clamping force on the contact area of the plug's pins).

I bought a Puritan PSM156 power cleanser, with close to 1KW of power amp, linear power supply and other items connected, I get no loss in dynamics using it. Thanks to Agon user who put me onto it. Oh, and it was one of the less expensive solutions.