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Answer: It reduces the chances of eletrical noise
Thats the most recent question on my networking class that i dont understand at all, my teacher tried to describe it, however her discription was mostly "because it does"...
Is there a chance somone could take a shot on this for me?
you talking about isolated ground?
Hmm I can't think of a really good way to explain it but I can give a example of it although it doesn't involve a breaker box. I used to have my entertainment center and wall unit AC plugged into the same outlet and when the ac would come on my tv picture would get scrambled, the local channels would get fuzzy and the digital channels would get pixelated. Don't know if that's the kind of example you're looking for but maybe it will help.
:you talking about isolated ground?
Im not sure, they didnt say these, were some sample questions from a Cisco networking test, so that might give you and idea of where their coming from.
:njdevs95
I seem to remember them talking about somethig similar to that, that you could get EMI from having something like a fridge/washing machine and a hub pluged into the same socket... but wait is that right? Wouldn't the problems be mostly because the fridge/washing machine sucks out a ton of juice when it starts thus causing the lights to dim?
Might not the scrambled picture come more from the EMI produced via the unit itself rather what wallsocket it was pluged into?
its mostly about segementing ground circuits...
when you install a breaker box, you have to drive a new ground connection...in the case of an office, its a whole new/seperate connection going to the common grounding rod in the basement, or utility substructure.
As for the AC/Fridge issue...When you have a heavy current drawing motor/compressor on a circuit; when it kicks in you can get strong voltage drops in sync with the phase of the motor. Because of the heavy draw on current, these voltage drops can below tolerance for electronics. Which is why they are placed on their own branch circuits.