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#41288 - 08/24/04 04:14 PM 100 amp panel  
jayson  Offline
Joined: May 2004
Posts: 49
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

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#41289 - 08/24/04 04:23 PM Re: 100 amp panel  
cpalm1  Offline
Joined: Jan 2004
Posts: 66
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

#41290 - 08/24/04 08:18 PM Re: 100 amp panel  
e57  Offline
Joined: May 2003
Posts: 2,876
60A tops if the thing (AC) is a real beast, sounds sketchy?

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#41291 - 08/24/04 08:36 PM Re: 100 amp panel  
Dave55  Offline
Joined: May 2004
Posts: 697
Crystal Lake, Illinois, USA
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?


#41292 - 08/24/04 09:47 PM Re: 100 amp panel  
Electric Eagle  Offline
Joined: Apr 2002
Posts: 914
Alpharetta, GA
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.

#41293 - 08/24/04 10:16 PM Re: 100 amp panel  
jayson  Offline
Joined: May 2004
Posts: 49
the 100 amp breaker is feeding a diconnnect with a 60 amp breaker.

#41294 - 08/25/04 09:36 AM Re: 100 amp panel  
Geno  Offline
Joined: Aug 2001
Posts: 16
Syracuse, NY USA
What size is the wire?

#41295 - 09/03/04 02:53 PM Re: 100 amp panel  
SJT  Offline
Joined: Jul 2002
Posts: 241
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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