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Old 09-03-2012, 02:20 PM   #1
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Use a 20VAC trans for a 16VAC doorbell?


Hi,
I picked up a new doorbell and it says it requires a 16VAC txfmr. The doorbell I am replacing uses a 20VAC one. Is there typically a tolerance on these doorbells or do I need to get the exact voltage they are saying? (Which, not surprisingly, seems to be only made by the same company)

Thanks,
Jason

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Old 09-03-2012, 02:45 PM   #2
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Use a 20VAC trans for a 16VAC doorbell?


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Originally Posted by j_sun View Post
Hi,
I picked up a new doorbell and it says it requires a 16VAC txfmr. The doorbell I am replacing uses a 20VAC one. Is there typically a tolerance on these doorbells or do I need to get the exact voltage they are saying? (Which, not surprisingly, seems to be only made by the same company)

Thanks,
Jason
If the manufacture says 16 VAC, then I would stick to that voltage. They probably know what they are talking about.

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Old 09-03-2012, 03:00 PM   #3
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Use a 20VAC trans for a 16VAC doorbell?


I agree with stickboy......

If it was 18Vac and you had a pretty good distance to go....ok....but at 20Vac.....unless you have small gauge wire..good chance the new door bell will not last long.
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Old 09-03-2012, 03:06 PM   #4
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Use a 20VAC trans for a 16VAC doorbell?


Are you sure your old transformer is 20 VOLTS and not 20 VA (watts)?
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Old 09-03-2012, 03:11 PM   #5
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Use a 20VAC trans for a 16VAC doorbell?





Typical multitap transformer..
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Old 09-03-2012, 07:49 PM   #6
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Use a 20VAC trans for a 16VAC doorbell?


You can use a resistor to drop that extra 4 volts !
But we need to know how much current the doorbell uses ?
Do you know ?
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Old 09-04-2012, 12:28 AM   #7
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Use a 20VAC trans for a 16VAC doorbell?


CLose enough for me. I bet you a doughnut that the "20 volt" transformer is at least 2 volts either way off of 20 volts.

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