On Thu, 21 Jan 2016 04:33:29 -0800, Phil Allison wrote:

wrote:

l wish to know the difference between negative 48 volts and the normal
48 volts.
Also l will be glad if a could have a circuit for a regulated -ve 48
volts power supply at 3A. thanks



** Those two requests ought not be in the same post from the same
person.

Well spotted. Does seem a bit odd.