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Determining the max wattage of a low-voltage transformer?

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Determining the max wattage of a low-voltage transformer? Ken 09-14-2007
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Posted by Ken on September 14, 2007, 1:35 pm
I have a low voltage transformer that was in the house when I bought
it. It doesn't doesn't have any exterior markings at all, so I'm not
able to know the wattage rating for the unit by looking at it. Is
there any way to determine the watt output of this unit?

Thank you.


Posted by CJT on September 14, 2007, 6:26 pm
Ken wrote:
> I have a low voltage transformer that was in the house when I bought
> it. It doesn't doesn't have any exterior markings at all, so I'm not
> able to know the wattage rating for the unit by looking at it. Is
> there any way to determine the watt output of this unit?
>
> Thank you.
>
You could stress it until it breaks, unless you've ruled out destructive
testing for some reason.

--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.

Posted by lee h on September 14, 2007, 6:42 pm
Ken wrote:
> I have a low voltage transformer that was in the house when I bought
> it. It doesn't doesn't have any exterior markings at all, so I'm not
> able to know the wattage rating for the unit by looking at it. Is
> there any way to determine the watt output of this unit?

Why do you say it's a low voltage xformer? was it connected
to your house mains? Where'd the output go? Doorbell?
thermostat? Outdoor lights? Or was the thing just laying
unconnected in a closet? by googling on transformer+intended use, you might
come close to the power rating.

Or put slowily increasing load on the output monitoring the
voltage, temperature, and 'hum', you might get an idea.

lee



Posted by RBM on September 14, 2007, 7:11 pm
There are probably markings on it that may be difficult to see. The two most
typical transformers found in a house would be 24 volt heating transformer,
usually 40 watts, and 8-16 volt bell transformers, usually 10 watts


>I have a low voltage transformer that was in the house when I bought
> it. It doesn't doesn't have any exterior markings at all, so I'm not
> able to know the wattage rating for the unit by looking at it. Is
> there any way to determine the watt output of this unit?
>
> Thank you.
>



Posted by Mark Lloyd on September 15, 2007, 11:21 am
On Fri, 14 Sep 2007 19:11:37 -0400, "RBM" <rbm2(remove
this)@optonline.net> wrote:

>There are probably markings on it that may be difficult to see. The two most
>typical transformers found in a house would be 24 volt heating transformer,
>usually 40 watts, and 8-16 volt bell transformers, usually 10 watts
>
>
>>I have a low voltage transformer that was in the house when I bought
>> it. It doesn't doesn't have any exterior markings at all, so I'm not
>> able to know the wattage rating for the unit by looking at it. Is
>> there any way to determine the watt output of this unit?
>>
>> Thank you.
>>
>

I still have a transformer I found in an old house. It was connected
to the black and yellow wires of the inside phone wiring. It was made
by Western Electric and is marked "105-125V 60Hz sec: 6-8V 1.75VA".
--
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http://notstupid.laughingsquid.com

"DISCLAIMER If you find a posting or message
from me offensive, inappropriate, or disruptive,
please ignore it. If you don't know how to
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