That should be “shock”, not “sock”! Hopefully my post now makes more sense…
David
> On 29 Apr 2021, at 10:11 am, David Batho dbatho@...> wrote:
>
> I wonder if the “boots” around the rails in new-build systems are any more effective than return current bonds. There was quite a fuss in the Sydney papers when a teenage (?) girl, walking barefoot down George Street during construction fo the SLR line, got a sock when she stepped in puddle. I seem to recall that the explanation was that they were trying out the electrical supply system.
>
> Does standing water, such as after rain, increase the electrolysis?
>
> David
>
>
>> On 28 Apr 2021, at 10:20 am, Mal Rowe mal.rowe@... mailto:mal.rowe@gmail.com> wrote:
>>
>> A couple of tramway projects are to happen over the next couple of weeks.
>>
>> Firstly, there is a program to install a substantial amount of kerbing in the CBD to enforce tram lane separation.
>>
>> Details are at: https://yarratrams.com.au/media/2176/cbd-kerbing-project-overview.pdf https://yarratrams.com.au/media/2176/cbd-kerbing-project-overview.pdf
>> One of the most common accidents involving cars and trams in the city involves taxis doing an illegal U-turn in the rush to get a fare. This should reduce that - especially since the areas where this is most common are marked for kerbs.
>>
>> Secondly, route 57 trams will be diverted via Haymarket on Monday and Tuesday next for what Yarra call a "Power Supply Upgrade".
>>
>> Details at: https://yarratrams.com.au/media/2174/north-melbourne-tram-works-update-may-2021.pdf https://yarratrams.com.au/media/2174/north-melbourne-tram-works-update-may-2021.pdf
>> Looking at the work sites, my assumption is that the work involves renewal of return current bonds - to reduce electrolysis.
>>
>> While new builds of tramways usually try to insulate the rail return from ground to prevent electrolysis, established systems like Melbourne bury tons of copper in the ground to keep return currents away from buried infrastructure. (Pic attached).
>>
>> Mal Rowe - expecting cab drivers to be quite unhappy
>>
>>
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>> <Earth-bonds_SwanstonSt_22May2011.JPG>
>
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