Re: Causes of Ground Faults

["Doug" <not@xxxxxxxx>]

Landscape sprinklers spraying onto PIV and OS&Y switches
Wire crushed between the back box and cover plate


Doug




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"Michael" <sirflannelS@xxxxxxxxxxxx> wrote in message
news:j5geo2535pd69ppr41o5sliiccahf8cp3q@xxxxxxxxxx
> On 18 Dec 2006 12:12:04 -0800, jonlevis@xxxxxxxxx wrote:
>
>>I have been asked to present a training seminar regarding fire alarm
>>systems, in particular addressable systems. I am looking for common
>>causes of Ground Fault Troubles that people have come across. Any one?
>
>
> Let's see....
>
> Wires stripped back too far behind devices touching back box
>
> wires stripped back too far in the control panel
>
> wires pulled tight and tye wrapped or secured around sharp metal
> corners
>
> wires pulled roughly during wiring, causing nicks in the wire
>
> heat detector and pull station  in resturaunt kitchens getting sprayed
> down during nightly cleanup
>
> leaky roof above smoke detector
>
> non-weather resistant horn strobe placed outside, moisture getting
> inside box, corroding wire and damaging horn strobe
>
> 50 feet of slack crammed into a 4-O box behind a horn strobe getting
> nicked and crushed inside the box
>
> Anyone think of anything I missed ?? <g>