low voltage device in panel

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Rewire

Rewire

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Got a call from a home buyer who told me at buyers inspection it was noted that the doorbell transformer was located in the panel and should be removed,I can't find the needed code reference to back this and I am not sure if this was ever allowed could use help.
 
If the class 2 wiring feeding the doorbell is within the panel you may have a problem with 725.55(A).
 
If I'm not mistaken, it is compliant for the line-voltage wires/terminals to be within the panel. Most modern transformers mount via a threaded hub and locknut, or a setscrew, into a 1/2" KO.
 
LarryFine said:
If I'm not mistaken, it is compliant for the line-voltage wires/terminals to be within the panel. Most modern transformers mount via a threaded hub and locknut, or a setscrew, into a 1/2" KO.
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those kind put the primary wires through the hub and locknut, which puts the transformer itself outside the box[/panel] being mounted to, and thus the secondary (lv) terminals and wires outside of the box/panel.

OP said the transformer was *inside* the panel.
 
LarryFine said:
If I'm not mistaken, it is compliant for the line-voltage wires/terminals to be within the panel. Most modern transformers mount via a threaded hub and locknut, or a setscrew, into a 1/2" KO.
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I have not seen the panel but I believe the transformer is in the panel enclosure and not mounted to the enclosure
 
cadpoint said:
Mix and Match, as long as the insulation matches the other ...
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The transformer still needs to be mounted to the box regardless of the insulation of the wire on the secondary side. I am not even sure the transformer itself is allowed to be in the enclosure. It certainly isn't designed to be.
 
match existing

match existing

780.6 if other than 725.55 (A- J) *(Thanks Infinity)

Granted its not your classic appliaction, JMO and surely others :rolleyes:

*Tom Cruise, "The made me study the Law", The Firm
 
cadpoint said:
Mix and Match, as long as the insulation matches the other ...
Click to expand...


I don't know how you would get around the separation issue with a class 2 transformer regardless of the insulation type.
 
cadpoint said:
OK. and if it rated for the service of V to whatever what makes it a Class 2 install ?
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This is a typical doorbell transformer where one side (primary) is 120 volts and the other side (secondary) is 10 or 16 volts and listed as Class 2.
If you simply dropped this into the bottom of a panel the Class 2 secondary wiring would be inside of the panel with the power conductors.
1533900.jpg
 
Panels are not listed to have anything installed inside but breakers.
One phone call to the manufacturer will conferm this. I had an electrican tell me it was ok to install photo cell in the panel. He called SQD and was told not only could he not install a photo cell inside, he also could not install on one the outside either. He was told it must be install in a box with a nipple to the panel. Go figure. I do allow the photocells installed on the outside without the box. Too much of a fight not to.
 
Cavie said:
I had an electrican tell me it was ok to install photo cell in the panel. He called SQD and was told not only could he not install a photo cell inside, he also could not install on one the outside either.
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This may be a dumb question, but why would one install a photocell inside a panel?
 
jerm said:
This may be a dumb question, but why would one install a photocell inside a panel?
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It is the type designed to be monted inside a post light with just a nipple and the window exposd.
 
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