[GreenKeys] Loop currents

[Jim Haynes]

On Sat, 3 Mar 2018, Ralph   Irish wrote:

> It is whether the selector magnets are in  SERIES  or  PARALLEL  that
> determines the need for
> either 20ma or 60ma.  I'm not going to lobby for one situation or the other,

There's more to it that that.  Model 14 and 15 with pulling magnet 
selectors have the magnets in series and operate at 60 ma.  Those with
holding magnet selectors can be wired with magnets in series or parallel
(some have a toggle switch) for 20 or 60 ma respectively.