Re: [Phys-l] Step down transformer trouble

[John Denker <jsd@av8n.com>]

On 07/06/2011 02:58 AM, Paul Lulai wrote:
> We can't keep our doorbell stepdown transformer working.  I thought i
> would check this group for thoughts. The transformer drops to 16v.
> That matches the input for our doorbell. The transformer is connected
> to ground and both the black and white house wires (as directed on
> installation instructions).  It is installed onto a standard junction
> box with (which has a cfl attached). I've changed transformers
> multiple times.  I checked the doorbell.  I found no problem, but
> thought a $20 change of bells might so it, so I changed it anyway
> (after the 2nd transformer).

Hmmm.

> It is installed onto a standard junction box

Heat buildup could be a problem.

Usually I've seen those things installed /not/ in a junction box.

If it needs to be in a box, make sure the box has plenty of holes.