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Posted By: jayson 100 amp panel - 08/24/04 08:14 PM
in a house panel with a 100 amp main can u put a 100 amp breaker on the bus . like if in the panel i have 2 20 amp lighting circuit breakers and 30 amp and 50 amp range and a 100 amp below that feeding central air unit.any help would be aprecicated thanks
Posted By: cpalm1 Re: 100 amp panel - 08/24/04 08:23 PM
you should not have a 100 amp breaker on the A/C it should be 20, 30, or 40 amps depending on the A/C units rating
Posted By: e57 Re: 100 amp panel - 08/25/04 12:18 AM
60A tops if the thing (AC) is a real beast, sounds sketchy?
Posted By: Dave55 Re: 100 amp panel - 08/25/04 12:36 AM
Typically, the wire is sized to the load, and the breaker matches the wire size. There are other circumstances, of course. What is the air conditioning load, and the wire gauge?

Dave55
Posted By: Electric Eagle Re: 100 amp panel - 08/25/04 01:47 AM
It is posible to have a 100 breaker for A/C, it's very common around here to have a 100 amp breaker serving a disconnect for 3 or 4 A/C units rather than having 3 or 4 diferent home runs for each unit.

To answer the guy's original question, yes it is posible, but if the A/C's draws a combined load anywhere near that 100 amps, it's too much for the panel with all the olther stuff.
Posted By: jayson Re: 100 amp panel - 08/25/04 02:16 AM
the 100 amp breaker is feeding a diconnnect with a 60 amp breaker.
Posted By: Geno Re: 100 amp panel - 08/25/04 01:36 PM
What size is the wire?
Posted By: SJT Re: 100 amp panel - 09/03/04 06:53 PM
Do you have a range and a dryer on this panel also? It sounds like you need to upgrade to a 200 amp service. Things would be OK, but then the 60 amp load of the AC arrives on the scene.
Very possible the main could trip. Is it worth living with that chance?
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