From: nmclain@annsgarden.com   
      
   On Wednesday, June 22, 2016 at 9:31:52 AM UTC-5, gfre...@aol.com wrote:   
   > On Tue, 21 Jun 2016 14:25:32 -0400, "J.B. Wood"   
   >  wrote:   
   >    
   > >On 06/21/2016 11:21 AM, gfretwell@aol.com wrote:   
   > >   
   > >> The typical distribution in SW Florida is ~13kv wye connected with 3   
   > >> phases on the main routes and a single phase going down residential   
   > >> streets. I know they use delta distribution in other places with  all   
   > >> 3 phases going down the streets and the transformers tap 2 of them. I   
   > >> assume that is what you are seeing. They pick up the ground at the   
   > >> secondary of the transformer and again at the service entrance to the   
   > >> home. Can you get a picture of a transformer?   
   > >>   
   > >   
   > >Hello, and if you Google images on 2-bushing distribution transformers    
   > >you'll see a number of examples.  Other than the additional HV insulator    
   > >they have the same footprint as a one-bushing transformer of equivalent    
   > >power handling capability.  Of course you can still use a 2-bushing    
   > >transformer with the HV bushings connected line-neutral as long as the    
   > >transformer HV side is designed for the correct MV distribution voltage.    
   > >  Most of the time these days (at least in the U.S.) you don't see a    
   > >single MV-to-LV transformer connected line-line (as opposed to    
   > >line-neutral) unless for some reason you don't have a neutral to connect to.   
   > >   
   > >Incidentally, in the suburb of metro Washington DC where I reside, the    
   > >above ground 4-wire MV distribution uses 34.5 kV line-line, 19.9 kV    
   > >line-neutral.  I think this is near the practical (safe?) limit for    
   > >line-line MV distribution voltage level.  Sincerely,   
   >    
   > This is what we see here   
   > http://gfretwell.com/electrical/transformer.jpg   
   > This is the transformer   
   > http://gfretwell.com/electrical/50%20KVA%20transformer.jpg   
   > http://gfretwell.com/electrical/50%20kva%20label.jpg   
      
   Are you sure the transformer sitting on the ground is the same as the   
   transformer on the pole?  The transformer sitting on the ground has two   
   insulators for phase wires plus one insulator for neutral.  The image of the   
   transform on the pole appears to    
   have only one phase-wire insulator plus one insulator for neutral.   
      
   Neal McLain    
   aka Texas Cable Guy   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)