Transformer in junction box
#1
Transformer in junction box
As I redo the wiring in my house I found a hot line leading to the chime (from the door bell). Inside the junction box is a bunch of wires but tossed in their is what I assume to be a transformer. From there the wires is low voltage one line goes to the chime, one goes to the door bell.
Is it OK for a low voltage transformer to be sitting in a metal 4x4 junction box along with a bunch of other wires? or is there a better way to secure/mount it?
The low voltage line is white and blue wires. It is not shielded in any conduits like the other wires. Is that OK, I assume it is not shielded because it is low voltage?
Is it OK for a low voltage transformer to be sitting in a metal 4x4 junction box along with a bunch of other wires? or is there a better way to secure/mount it?
The low voltage line is white and blue wires. It is not shielded in any conduits like the other wires. Is that OK, I assume it is not shielded because it is low voltage?
#3
Member
My house (1920s) had the original doorbell transformer in a basement junction box mounted on a wooden backboard near the old meter box. That junction box contained 120V, 240V, and the secondary (16V) doorbell circuits. I am guessing this was not a code violation in the 1920s, and therefore it was grandfathered, but it would not be allowed for new work today.
So, when I rewired I installed a new transformer on the outside of the same junction box. The new transformer was designed with a set screw that is tightened to hold it in a 1/2" knockout, and the primary wires thread through the same knockout into the 120VAC box. The transformer's secondary is terminated outside the box. That meets current code.
So, when I rewired I installed a new transformer on the outside of the same junction box. The new transformer was designed with a set screw that is tightened to hold it in a 1/2" knockout, and the primary wires thread through the same knockout into the 120VAC box. The transformer's secondary is terminated outside the box. That meets current code.
#4
The HV in the box, LV outside of box, what about the actual transformer itself, should it be in or out of a box? I'll take a pic today and post it.
#5
Member
#7
Thank you.
I am assuming the transformer came with the chime as a unit. There is no writing on that either as to what kind. May be I would need to buy a new chime that comes with a compatible transformer?
I am assuming the transformer came with the chime as a unit. There is no writing on that either as to what kind. May be I would need to buy a new chime that comes with a compatible transformer?