Dedicated Circuit - Quad Receptacle Question

I assume you are going to hire an electrician to do the job.
Have 2 dedicate lines ran instead of one. It won't cost you that much more.

Wire, NM-B (Romex example of) minimum size 12-2 W/grd. (One cable for each duplex receptacle/dedicated circuit)

Have the electrician use a plastic 2 gang old work box or 2 single gang plastic cut-in boxes.

Make sure the electrician installs both circuits on breakers fed from the same line. Both on L1 or both on L2, not one on each.

the Hubbell 8300-HI is commonly used, but can someone suggested a quad receptacle of hospital grade quality?

Two duplex outlets = a quad..... If you want both receptacles in the same box use a 2 gang duplex receptacle cover plate.
Example: [url]http://www.hardwareandtools.com/invt/8747685[/url]

Theunderlyingtheme,

L1 and L2 alternate every other breaker down each side of the electrical panel.
Here is a diagram Glen B, a member of AA , supplied in a post.

You should not load up one leg, line, with all the 120V heavy load appliances. The 120V loads on L1 and L2 of the panel should be somewhat balanced.

Best you can do is make sure the breakers for the new dedicated circuits are not directly across from appliance load breakers and not directly above or below noisy loads.
Jim