> It's already used for the poles but don't you think it's transformers
> which deserve the most the usage of power=* ?

>In this case no.
>From an electrical viewpoint the transformer is of course important. However, 
>is this the most important aspect for the average user? You see a pole in >a 
>row of poles and this particular one happens to have some kind of lump 
>attached to the top. It may be useful to tag this fact for navigational 
>purposes >but it is otherwise of doubtful use. Very few users will be 
>interested in the details of that transformer or its connections to the grid. 
>Even when I'm >interested in power grids myself I don't find the lower voltage 
>distribution grids particularly interesting. Furthermore, it is mostly 
>impossible to map the >distribution networks to any degree of completeness due 
>to undergrounding etc. Thus I can't see much need to develop an elaborate 
>tagging for this >reason especially if it is not compatible with the existing 
>tagging practice. However, the average mapper may still want to tag the 
>transformer as an >interesting feature of the pole. An additional
 attribute tag (transformer=yes/*) will be sufficient for that and it won't 
break anything. Data consumers can >easily extract this information if they 
need to.

+1 
I have the same opinion
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