10,000 AMPS???? Electrical Question

slantxl

Member
So I was checking my breaker box today and noticed something a little strange. All the breakers say 10,000 AMP. Is this possible???I don't know much about electrical setups. I know the previous owner of the house I am living in was a certified electrician and he worked in the hotel industry doing general maintenance. I googled 10,000 AMPS and got a few searches that pointed me in the direction of hotel rooms using 10,000AMP. What does this mean to me? Any electricians advice would be greatly appreciated and I would give mad rep. Thanks.

Attached is a picture of the breakers.
 

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Creek

Active Member
Okay here we go

Breakers are rated in amps, not watts. Breakers and fuses have a "Time Current Curve" There is not a single point where they trip. They may hold for hours when slightly above their rating, but will trip in a few milliseconds with a very high fault current. Residential breakers have an AIC of 10,000 amps. This is the Amperes Interrupting Capacity. These breakers can take up to .008 seconds to trip with a direct short. In this small amount of time the fault current will not reach its full value because it is only one half of a cycle (for 60 Hz. systems). A residential transformer can exceed 26,000 amps in a full cycle under a direct short. A #12 copper wire with 75 deg. C insulation can withstand 3800 amps for 1/2 cycle without sustaining any damage. That is why a 20 amp breaker has a 10,000 AIC rating. The manufacturer can supply a TC curve for any breaker they make
 
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