Electrical Home Runs
For Residential (for some Commercial) Electricians the Home Run is an important concept they work with constantly.
A home run is just an electrical slang term for circuit feeder. It is just the first run of wire from the panel to the first device (or only device.) devices such as a refrigerator, stove, or dryer get their own circuit (it is not shared with any other devices.) this is for a few...in the case of a fridge, picture your fridge being on the same circuit as lights and plugs. If you were to overload your circuit while you arnt home, your fridge will lose power...not good. as for a dryer and stove they are different amparage and voltage levels than your typical 15 amp 120v systems. dryer being a 30 amp 240v system typically, although technology is changing this. all aside your high powered devices typically draw to many amps to share them with anything else anyways.
A typical home will daisy chain receptacles and lights together, but split up in different areas of the home. daisy chain just means the power will loop through each device and continue on to the next, powering all at the same time. no more than 12 receptacles can be on the same circuit according to code, but it is a good idea to leave some breathing room, 9 or 10 is a better number.
An electricians job in regard to homeruns is determine his or her circuitry layout, and start pulling wire from the panel outwards, this requires knowledge of devices and their electrical ratings.