Power and ground in old houses
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Posted by James Knott on March 24, 2005, 10:54 pm
Please log in for more thread options Al Dykes wrote: Back when I worked for a telecommunications company, we told the client what power was required. It was their responsibility to provide it. Advise the client what you've found and have them call in an electrician. Any attempts to bastardize the power cables can bring you a lot of grief, should problems develop. The only legal way to use a grounded plug on two wire circuits, is to use a GFI. Then again, unless you're a licenced electrician, you've got no business touching a clients AC wiring. | ||||||||||||||||||||||||||||||||||||||||
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Posted by Individual on March 30, 2005, 12:13 am
Please log in for more thread options Al Dykes posted for all of us... >
The only way to test a ground is with an Ideal Industries "Sure Test".
> I routinly get asked to work on computers in buildings that have > pre-war wiring. Two prong receptacles, not many of them, and > who-knows-what behind the walls. Of course everything the user wants > to hook up requires 3 prong outlets. > > When I take the wallplate off I find rubber and fabric-insulated wire > that can crumble if I disturb it. There is no way I'm going to try to > put a modern grounded receptacle here. > > I can scrape the paint off the plate and put a 3-wire adapter with a > ground tab in with an OK connection to the ground tab. A wiring test > gadget shows that hot/neutral/ground is correct. (or not, in one > case.) > > What's acceptable practice here ? > > The 3 light testers are a wishing and a hoping. Are you certified in your AHJ for high voltage? Wiremold/Panduit makes surface mount raceway with this situation in mind. Has a divider between the low & high voltage. Get with an electrician and confab what to install. He/she will be familiar with the area & requirements. Look out for an "electrician" who does low voltage also; he will not be your friend. Provide a package solution to the customer by one of you possibly subbing to the other. -- Tekkie | ||||||||||||||||||||||||||||||||||||||||
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> I routinly get asked to work on computers in buildings that have
> pre-war wiring. Two prong receptacles, not many of them, and
> who-knows-what behind the walls. Of course everything the user wants
> to hook up requires 3 prong outlets.
>
> When I take the wallplate off I find rubber and fabric-insulated wire
> that can crumble if I disturb it. There is no way I'm going to try to
> put a modern grounded receptacle here.
>
> I can scrape the paint off the plate and put a 3-wire adapter with a
> ground tab in with an OK connection to the ground tab. A wiring test
> gadget shows that hot/neutral/ground is correct. (or not, in one
> case.)
>
> What's acceptable practice here ?
>