I understand what u are talking about changing back to the 20 amp, but this what runs during the day skill saw, drill but not everyday, 3 fans that r 21 inch box fans runs 24/7, over head light 2 - 26 watts and then there the water cooler that runs during the day from 9am to 10 pm and next month will be a swimming pool pump and that will run 24/7..
Night time is 400 watt and 4 daylight bulbs, 2 soft white cfl's and the fans..
When turnning on my cooler and when I use my skill saw at one moment the power draws from the house and my wife can tell when i start something up and since I up my breaker she don't see the power draw and the house is on it own panel and the shed (Shop) is on it own.
I also seen when after changing the breaker and turned the power back on the the meter is running alittle faster then before I turned the power off..
And NO I am Not Tripping the 20 amp breaker at any given point on all of this.[/quote
Basically it boils down to this: If you were not tripping the 20 amp breaker, there was absolutely no reason to go to a larger breaker--there is no upside to it and lots of downside. If you were tripping the 20 amp breaker, it is dangerous to go to a larger breaker without also changing the wire to the correct gauge.
If draw from the shed is affecting the electricity in the house, you may have some electrical issues that should be addressed--this is not normal. The meter should not be running faster with the larger breaker if electrcity demand is the same. I am not an electrician, and could be wrong, but when demand on the 20 amp exceeds 20 amp, it will trip. Since it did not trip, demand did not exceed 20 amp and having a 30 amp breaker wouldn't result in more electricity usage if the same amount of appliances/tools were being used.
Whoever told you to up the breaker gave you very bad advise and could have potentially put you at great risk of an electrical fire. Before making changes to things like electricity, plumbing, structure, ventilation, it is always a good idea to consult a specialist. There are many sites on the web that answer DIYers questions regarding the above.