Re: [Repeater-Builder] cart wheels...

Thu, 05 Jan 2006 19:09:04 -0800

ALDI  has the 25 cent cart release mechanism, only to get it back when you put the strap back in the slot and you get your 25 cents back.

Id rather Shop @ Wal-Mart or Sams Club.


skipp025 wrote: 
Now the cart mfgrs are replacing at least one 
cart wheel with same size unit made with/from 
conductive material (composite). 

The new neat'o trick is the replacement locking 
wheel - latch set up if you try to leave the 
market parking lot with a cart. All built into 
the wheel hub assembly.  

cheers, 
skipp 

  
Dale Pratt <[EMAIL PROTECTED]> wrote:
I don't know what you are talking about by straps 
on shopping carts but the state of WV has been using 
chains fastened to axle housings and let them
drag roadway for years is this same idea?
                 Oldmax


On 1/2/06 1:56 PM, "Laryn Lohman" <[EMAIL PROTECTED]> wrote:

    
--- In [email protected], "Dick" <[EMAIL PROTECTED]> wrote:
      
The strap dangled from the bottom of the vehicle.
Is a road a good ground?  Is dirt a good ground?
In terms of lightning, yes.  In terms of static charge,
no.  The straps had about a megohm of DC
resistance and, in cold, dry air they caused a charge
by being dragged along the road.
        
Dick,
I've always looked at it this way-- A "good ground" is not required.
The strap would simply provide a <leak> to ground to prevent the
charge on the vehicle from ever reaching a level that could arc,
probably at the hose end where an arc to something could ignite the
vapors.  And this charge would only be a problem while stopped and
preparing to dispense fuel.  Maybe I'm wrong, but a charge on a
vehicle while traveling would not be a huge problem...

Anyway, you're right that these straps were probably not the best
idea, since they have been replaced by other static mitigation means.

Happy New Year!

Laryn K8TVZ







 
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