Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bionet!agate!ucbvax!hplabs!hpl-opus!jewett
From: jewett@hpl-opus.HP.COM (Bob Jewett)
Newsgroups: sci.electronics
Subject: Re: Transformer Troubles
Message-ID: <65200004@hpl-opus.HP.COM>
Date: 20 Jul 89 02:55:23 GMT
References: <536@winnie.fit.edu>
Organization: HP Labs, High Speed Electronics Dept., Palo Alto, CA
Lines: 19

> I have a 120v/12v transformer driving about 25 12v, 20
> watt halogen bulbs (I am not sure of the output current of the trans-
> former).
...
> Since this is for a pre-wired house, not a lot of rearranging of bulbs,
> wires, etc can be done.

12V and 20W implies about 2 amps per bulb, times 25 bulbs gives 50 amps.
Check your wires out.  If they are not rated for 50 amps, you are risking
starting a fire.

One solution that requires at least a little rewiring is to put 10 bulbs in
series rather than parallel.

> I appreciate any and all discussion about my problem...

What does the electrical code in your area permit?

Bob