rec.arts.theatre.stagecraft

On Sun, 09 Sep 2007 03:23:53 +0100, Phil Allison > =

wrote:

>
> "Duncan Wood"
> Phil Allison
> "Andrew Gabriel"
>>
>>>
>>>> RCDs for protection against high earth fault loop impedance and
>>>> not electrocution should be rated at least 100mA.
>>>
>>>
>>> ** Care to explain you pompous jargon ?
>>>
>>> The mysterious phrase " high earth fault loop impedance " don't me=
an
>>> jack shit to anyone.
>>>
>>> The use of plain language is always preferred when addressing an
>>> audience.
>>
>>
>> Err that is plain language,
>
>
> ** It is plan bollocks.
>
>
>> the its the minimum impedance a fault to ground can flow through.
>
>
> ** Worse gobbledegook than the original verbal diarrhoea.
>

It's the impedance of the entire circuit if you short the phase cable to=
=

ground, including the LV transformer & feed cable. So divide your phase =
=

voltage by the earth fault impedance & you get the maximum current that =
=

can flow. If that's still gobbldegook then you need some basic knowledge=
=

about electricity to play. Or use google.

/ ?title=3DLV_Fault_Calculation_Over=
view

>
>> Jack Shit ...
>
>
> ** Is about all you know.
>
>
>
> ...... Phil
>
>
>
>
>