[Amps] 2 more questions-- electrical

[Ron Youvan]

Charles Harpole k4vud at hotmail.com wrote:

> 1.  Is it possible for the shack ground via a couple of earth implanted ground rods to be a "better" ground than that on the breaker box?  (The one with a 3 foot steel rod.)

  No, that is not possible. The power company grounds IS thousands of 
ground rods one under every other power pole all the way back to the 
generating plant in parallel.  AC impedance measurements here always go 
off the scale in the direction of .000001 Ohm. (W.C. Florida)

> 2.  If you have a battery operated device which charges from the car 12 VDC and it is hot on the car battery all the time....  will the car battery draw a drain from the device battery when the car is not running?
> Thank you all for very thoughtful replies to the 230VDC question.  73

  Yes always, it is called "surface leakage" and it is usually between 2 
and 3 Amperes for a full sized car battery, it generates heat in the 
battery. (possibly less dependent on chemistry)  This is what causes a 
fully charged battery to self discharge.
-- 
    Ron  KA4INM - Endless Loop: n.        see Loop, Endless.
                  Loop, Endless: n.       see Endless Loop.
                  -- Random Shack Data Processing Dictionary