Are two dedicated lines better than one?

Yes, to second the above:
a) buy some good quality industrial grade wire
b) get 3 dedicated lines, as per Stehno above: one being the "big" one, use one for digital, one for big loads, the 3rd for all others.

The electrician might complain for not using his/her own wire (i.e. lose some profit on that) but you'll make it up for him asking for 3 instead of 1 line.

Greg and Stehno are dead right for the simple reason, that I did exactly that....and how can I be wrong!!?? (-;
P.S. The electrician didn't complain, I treated him for free, hehe..........

I did 5 lines in my place,(2 30 amp lines for each Monoblock amp, 1 20mp for Digitial, Analog (turntables, phono Preamp, and 1 for Standard Preamp, at the time i was running huge Fourier Panthere Tube OTLs for amps, A Counterpoint SA11 17 tube preamp, and a Counterpoint SA9 13 tune phono stage) kinda overkill however the extra costs and time were insignificant, so I did it, isnt going over the top one of the characteristics of high end??

Ive since pared down some of gear, but the extra $150 in parts/labor costs I felt were well worth it

Stehno,
Is there any better if I use power conditioners with dedicated lines. If so, which source(s) should be used with the power conditioner primary. Assuming that I have only one power conditioner.
Thanks so lot in advance.

Oanhu, if I understand your first question correctly, the answer is dedicated lines do nothing to clean up dirty AC. With the exception that the digital source will no longer inject it's digital noise into the other components.

Therefore, if a power conditioner had benefit before dedicated lines, one should realize benefits from the power conditioner after dedicated lines.

In my experience, I realized greater benefit installing a line conditioner for the amplifier, then the pre-amp, then the cdp. Other's will disagree with this priority but that's my experience.

-IMO