Door bell transformer

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Towzzer

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Is it against the NEC code to seal a lv door bell transformer inside drywall as long as the box it's connected to has a plate to access the 120v splice
 
Re: Door bell transformer

Originally posted by Towzzer:
Is it against the NEC code to seal a lv door bell transformer inside drywall as long as the box it's connected to has a plate to access the 120v splice
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Yes that would be against code and common sense.

110.26 Spaces About Electrical Equipment.
Sufficient access and working space shall be provided and maintained about all electric equipment to permit ready and safe operation and maintenance of such equipment. Enclosures housing electrical apparatus that are controlled by lock and key shall be considered accessible to qualified persons.
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In other words the NEC expects that if the transformer stops working you will be able to get to it for replacement.
 
Re: Door bell transformer

Just out of curiosity, where is the best place in a house to conceal the transformer? Assuming the house has either no basement or has a finished basement.
 
Re: Door bell transformer

I usually put DB xfmr in a closet, either above the door header or high on a side wall.
 
Re: Door bell transformer

I have always seen them in the attic, hanging by one screw from a box.
 
Re: Door bell transformer

Originally posted by bensonelectric:
Just out of curiosity, where is the best place in a house to conceal the transformer? Assuming the house has either no basement or has a finished basement.
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On the oil burner / gas furnace j-box.
 
Re: Door bell transformer

Originally posted by magoo66:
I usually put DB xfmr in a closet, either above the door header or high on a side wall.
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Watch out, the inspector might accuse you of planning to change it to a non-code compliant closet light! :D
 
Re: Door bell transformer

Originally posted by magoo66:
I usually put DB xfmr in a closet, either above the door header or high on a side wall.

It`s ok to do this as long as all wiring within that box is rated for it.Take standard bell wire the insulation is not rated if my old memory serves me well ;)
 
Re: Door bell transformer

Originally posted by allenwayne:


It`s ok to do this as long as all wiring within that box is rated for it.Take standard bell wire the insulation is not rated if my old memory serves me well ;)
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That's not entirely true Allen. There are other things to consider. Read this thread for more info. You might want to read those code section carefully and rethink your answer.
 
Re: Door bell transformer

Also take a look at section 90.3. Its assumed you understand this section when using the NEC. Its why 725.55 overrides 300.3(C)(1)
 
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