What's involved in dedicated lines

Gjkphd, you can go either way as long as new wire is directly connected from the outlets to the fuse box (specifically, each fuse will service one and only one outlet). As mentioned earlier, there are a number of very good threads on this with lots of great expert advice, like Harry's above -- search under "dedicated line". It pays to do your homework before talking to an electrician since few electricians are used to running dedicated lines for audiophiles.

you can certainly use your old outlets if you wish.

I just unscrewed the fuse (20 amp) to see what else was on the line in addition to my stereo/ht. This line controls my kitchen fluorescent light, one outlet used by a cordless phone, and two other overhead lights. Are there degrees as to how negative line sharing is, or is it the more other items on the line the worse it is? or are some items like a refigerator worse to share the line with? Some of my otgher fuses are 15 amp, it's good that my stereo is on a 20 amp line?

Gjkphd, I am so not an expert on this, it's ridiculous. But, here's my 2 cents:

First of all, if you have an old fusebox, & you plan to keep the house for awhile, it's probably worth it to upgrade to at least a modern 100 amp main panel w/circuit breakers, regardless of your audio issues. (Like Viridian said). Spending a lot of $$ on dedicated lines when you have an old fusebox seems to me like worrying about which Pirellis to buy for your Model T. But that's more of a homeowner's perspective than an audiophile's.

And yes, probably some things like a refigerator, or fluorescent lights, are worse to share the line with. (Hello!) But maybe tell us more about your system, your budget, etc.......

In response to your post Steveaudio, I've been in this home 12 years and am not going anywhere in near future so I will look into the changout from fuses to breakers, how will that be better audiophile-wise?
system incl cary preamp, pass x-250 amp, kora hermes dac, modified sony cd/dvd transport, tuner, acurus pre/processor, nad amp for kitchen and patio speakers, b&K 3 channel amp for surround, and tv and vcr and digital cable box. I have a tara labs line conditioner for sources and all equp have upgraded power cords , b&K and pass amps go straight into the fim outlets,