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08-28-2008, 04:10 PM
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Join Date: Apr 2007
Location: WESTMINSTER CO
Posts: 190
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AC DISCONNECT OVER AMPED
hey all
inspection today and ac max fuse was rated at 35 amp. main panel breaker was 30 amp,but ac outside disco had a 60 amp breaker in it. a write up YES???
CHARLIE
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08-28-2008, 04:19 PM
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Join Date: Mar 2007
Location: Columbus GA
Posts: 382
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Re: AC DISCONNECT OVER AMPED
You say the breaker in the house that controls tha A/C is 30a
But at the A/C disconnect it's a 60a
No problem
(I'm waiting for the slap on the head) 
__________________
Rick Cantrell
Columbus GA
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08-28-2008, 05:18 PM
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Join Date: Mar 2007
Location: Myrtle Beach, South Carolina
Posts: 325
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Re: AC DISCONNECT OVER AMPED
The A/C is protected by the interior 30 amp breaker.
The exterior disconnect is just that, a disconnect,
Most A/C disconnects that I see have a blade type disconnect that pulls out and can be re-inserted backwards without making electrical contact.
Some are even "throw" handles either on or off.
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08-28-2008, 05:35 PM
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Join Date: Apr 2007
Location: WESTMINSTER CO
Posts: 190
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Re: AC DISCONNECT OVER AMPED
VICTOR
thats what i usually see the blade pull out fuses. i have never seen a breaker there before and such a high amperage
thanks
charlie
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08-28-2008, 05:38 PM
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Join Date: Mar 2007
Location: Alvin Texas
Posts: 367
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Re: AC DISCONNECT OVER AMPED
I have been seeing a lot lately rated at say 35 amps max per manufacturers label, but with a 40 amp fuse in the main panel.
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08-28-2008, 05:52 PM
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Join Date: Apr 2007
Location: WESTMINSTER CO
Posts: 190
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Re: AC DISCONNECT OVER AMPED
john
thats not right!! i always write that up as" ac overfused". but this 60 breaker is the first i've seen
charlie
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08-28-2008, 06:26 PM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
Posts: 7,635
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Re: AC DISCONNECT OVER AMPED
Rick and Victor are correct in that the lower amperage breaker in the house panel protects it properly.
Regardless where the lower amperage breaker is, it will protect it properly.
Here is another thing to consider too: That ac disconnect is most likely not a breaker (does not offer any overcurrent protection), but is simply a "molded case switch".
They take the cases used for breakers and stick "disconnect switches" in them, but no overcurrent mechanism.
I tried zooming in on it, and it looks like is says "Molded Case Switch" in the second line down on the left side. It's too fuzzy to read when zoomed in that much, but I know what it most likely is and the fuzziness 'looks like it says that'.
Looks like it says:
2 Pole Type CP
Molded Case Switch
Listed ????
?????? UL
(can't make any more out)
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08-28-2008, 08:42 PM
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Join Date: Mar 2007
Location: Camp Verde, Arizona
Posts: 455
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Re: AC DISCONNECT OVER AMPED
Damn Jerry, you got good eyes for an old fart!
elizondo inspection 100.jpg
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08-28-2008, 09:29 PM
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Join Date: Mar 2007
Location: Dallas, Texas
Posts: 1,578
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Re: AC DISCONNECT OVER AMPED
Yep, that looks like the standard disconnect switch, no over current protection. That is a very common disconnect switch arrangement here. Of course we see more central A/C than you guys in the more temperate climates. I can't remember the last house I inspected that did not have central a/c.
The breaker at the main panel will be the over current protection.
__________________
Jim Luttrall
Mr. Inspector.net, Inc.
Allen, Texas 75002
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08-28-2008, 09:40 PM
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Re: AC DISCONNECT OVER AMPED
Fritz,
I was reading the writing on the breaker itself.
But I was cheating ... I knew what I expected it to say.
I also 'think' that next line down that I can't read says something like '10,000 A.I.C' before the UL symbol.
Below that, I'm not remembering what should be there, so it is all just fuzzy 'something'.
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08-29-2008, 06:32 AM
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Join Date: Jul 2008
Location: Costa Rica
Posts: 7
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Re: AC DISCONNECT OVER AMPED
Very good Jerry,
If it is just a switch why does it have a 60 amp rating. I am also surprised the NEC allows look alike equipment. Someone with much less vision than Jerry (like me) could confuse that for a breaker.
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08-29-2008, 06:55 AM
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Location: Dallas, Texas
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Re: AC DISCONNECT OVER AMPED
I'm not Jerry, but somewhere on the switch it usually says something like "no overcurrent protection", usually on the face. I think the UL sticker on the one pictured says "misc. switch". When installing, there is no doubt that it is just a switch.
The 60 amp is the rating of the switch, just like a duplex outlet is rated for 15 or 20 amps depending on the construction.
__________________
Jim Luttrall
Mr. Inspector.net, Inc.
Allen, Texas 75002
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08-29-2008, 06:56 AM
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Join Date: Aug 2007
Location: Memphis TN.
Posts: 1,602
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Re: AC DISCONNECT OVER AMPED
Originally Posted by Paul Johnston
Very good Jerry,
If it is just a switch why does it have a 60 amp rating. I am also surprised the NEC allows look alike equipment. Someone with much less vision than Jerry (like me) could confuse that for a breaker.
.
Good morning Paul,
I kind of look at it like a lighting fixture rated at a maximum 100 watt that can safely burn a 60 or 75 watt bulb. 
.
__________________
It Might have Choked Artie But it ain't gone'a choke Stymie!
Billy J. Stephens HI Service
Memphis TN.
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08-29-2008, 08:24 AM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
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Re: AC DISCONNECT OVER AMPED
Originally Posted by Paul Johnston
If it is just a switch why does it have a 60 amp rating.
As Jim (and Billy) said, that's just the maximum rating of the switching mechanism and its contacts.
I am also surprised the NEC allows look alike equipment. Someone with much less vision than Jerry (like me) could confuse that for a breaker.
Paul, you are not admitting that you don't read what it is that you are going to install, are you?
Many times I've installed fixtures in our house and my wife (who happened to read the box which said 60 watt maximum wattage in large print on the picture of the fixture) asks 'Why are you putting 100 watt bulbs in there, it says 60 watt maximum?' 
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08-29-2008, 10:29 AM
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Join Date: Jul 2008
Location: Costa Rica
Posts: 7
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Re: AC DISCONNECT OVER AMPED
No I'am not saying I don't read it its just that big brother is always trying to protect us from our self. A untrained person could instal it like as a 60apm breaker. That is way they changed the old screw in fuses to keep them from being inter changeable.
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08-29-2008, 10:47 AM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
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Re: AC DISCONNECT OVER AMPED
Originally Posted by Paul Johnston
A untrained person could instal it like as a 60apm breaker. That is way they changed the old screw in fuses to keep them from being inter changeable.
Actually, that is a bad analogy.
To fit that analogy, all breakers of different ratings would not be interchangeable into the same breaker space. I.e., you would not be able to install a 30 amp breaker where a 15 amp breaker would fit.
Now that would *really screw up* panelboards as we know them.
I do understand what you are saying, though. Mr. Average Joe Homeowner goes down to the Big Box store and Mr. Unknowing Salesperson direct Joe over to Aisle 14, down by the end, on the left side, where Joe picks through the breakers and pulls out a molded case switch because the molded case switch is in the wrong place.
Yeah, with those set of events, that could happen. But so could lots of other *bad things*.
The code does not, cannot, protect against unknown stupid people tricks 'just because someone might do something'.
You think the code is to complicated now, you would have to carry around a 32 volume set, like Encyclopedia Britannica, one volume address different 'stupid people tricks' and why you are not allowed to 'use this' under 'those conditions'.
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08-29-2008, 12:14 PM
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Join Date: Aug 2008
Location: Altoona, Iowa
Posts: 39
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Re: AC DISCONNECT OVER AMPED
Rick and Victor are correct!  Just remember Charlie, the outside is a service disconnect only(Service Disconnect for the HVAC Tech) as long as the interior main service panel has the proper size breaker and wire size, the condenser, and wiring, are protected properly.
ProSite Home Inspections
Altoona, Iowa
Dan Hagman
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