Thanks Torsen,
indeed the link is useful but for some of our servers (DL380G5 was an example because the HW type we own varies) it reports more than one power supplier installable. See
http://partsurfer.hp.com/Search.aspx?SearchText=430240-425
In case of the following the servers accepts two kind of power suppliers and hence how to discern?
That's why I thought of querying the machine in somehow.
Alessandro
