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Old 10-06-2012, 05:09 PM   #1
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Blown fuses....


Today i was over at my parents house and my dad told me that 3 different fuses blew over the last 2 days. All on completely different circuits, bedroom, washing machine and the 3rd a basement TV.
The house has 60 amp service and is about 60 years old.
Any info greatly appreciated!
Thanks!

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Old 10-06-2012, 07:19 PM   #2
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Blown fuses....


fuses or Cricut breakers? if fuses they could just be old, and the same for the circut breakers. Are the rooms and circuts that blew close together, might the wiring be running the same wall, or area of the attic or craw space?

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Old 10-06-2012, 08:37 PM   #3
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Blown fuses....


They are fuses like i said the house is 60 years old.
2 of them probably would be fed from the same area, but the washing machine is a fair way away.
thanks.....
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Old 10-06-2012, 08:46 PM   #4
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Blown fuses....


Moving a vacuum cleaner around?
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Old 10-06-2012, 09:21 PM   #5
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Blown fuses....


I'm not a sparky but what if there had been a temporary local voltage drop from the main supply..would that cause over amperage and fuses to blow OR ..just coincidence with old fuses that were of similar old age and just wore out

loose fuses..tighten all..

keep an eye on the situation..if trouble persists check further..
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Old 10-07-2012, 12:59 AM   #6
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Blown fuses....


Could be a combination of two factors !
1 - small service 60a is not much, so its probably pushed to its limits.
2 - old fuses running near there limits.

Check and replace ALL fuses with new ones.
Check what sorts of loads the system is called upon to deliever,
is a 60a service enough ?
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Old 10-07-2012, 08:14 AM   #7
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Blown fuses....


What was being used at the time a fuse blew?

An individual branch circuit fuse is no more likely to blow simply because the complete service (60 amps or so) is inadequate for the house.
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Old 10-07-2012, 09:18 PM   #8
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Blown fuses....


Since a lot of houses have no trouble maxing out a 100 panel,
Then maxing out a 60a panel would be quite easy !
Most people dont think about there houses electrical capacity
when they buy the latest gizmo /creature comfort.
Then think that if there is an outlet, they can just plug it in.
Point is, with a 60a service you could easy max it out
without even realising it. and if it is running close to its limits
then this would explain the fuses poping from time to time.
Power moniters are cheap and readily available,
perhaps using one will soon tell just how much they are using.
It could be more than you expect !

If fuses are poping the two most likely causes are
1 - a fault / short somewhere.
2 - the fuses are running at maximum capacity,
which is never good.

My guess is number - 2.
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Old 10-07-2012, 09:26 PM   #9
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Blown fuses....


The size of the service has nothing to do with the fuses for branch circuits blowing.
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Old 10-07-2012, 09:54 PM   #10
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Blown fuses....


I think you missed my main point !
Overloading is the most likely problem.
And if fuses are run at maximum capacity
then they will frequently fail.
So if you are running 10a continueously thru
a 10a fuse it will fail,
even thou the circuits wiring might not be overloaded.
I beleive 80% is the standard used.
So the fuses are not adequate for the loads used.

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