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-   -   2 wire service and laptop computers (http://www.diychatroom.com/f18/2-wire-service-laptop-computers-46332/)

gregdonovan 06-10-2009 08:28 AM

2 wire service and laptop computers
 
when our potential new (first) home was inspected we learned that it has a combination of 2 wire service and updated 3 wire service. the house was built in 1917 and the wiring was updated and a breaker box was installed in '03.

during the inspection the inspector mentioned that computers dont like 2 wire service outlets. does that apply to laptops as well? i was thinking no since my power cord is not a 3 prong plug and it converts whatever power it gets over to DC to charge the battery.

am i wrong or do i need to string up a lot more 3 wire outlets? there are some in the house and we plan on adding a bunch of GFCI outlets when we move in.

skipjack 06-10-2009 09:17 AM

Most laptop external power supplys contain some sort of power conditioner in them to handle any fluctuations and spikes in power (I know my Dell does). So, you should be okay in a two pronged outlet with your two pronged power supply.

hayewe farm 06-10-2009 09:27 AM

If you only have 2 prongs what would the added ground wire connect to. Computers with 3 prong plugs depend on the ground for a filtering path for noise but lap tops do not. They are basically self contained and the power cord does little more than recharge the batteries.

ScottR 06-10-2009 10:07 AM

Quote:

Originally Posted by hayewe farm (Post 285395)
and the power cord does little more than recharge the batteries.

... powering the computer is more than little more. :whistling2:

But agreed, if the power brick has no ground connection you'll be fine.

gregdonovan 06-10-2009 12:24 PM

Quote:

Originally Posted by hayewe farm (Post 285395)
If you only have 2 prongs what would the added ground wire connect to. Computers with 3 prong plugs depend on the ground for a filtering path for noise but lap tops do not. They are basically self contained and the power cord does little more than recharge the batteries.

that is what i was thinking. thanks. we only have laptops so we are good to go in that respect.

at one point one bedroom had the plaster ripped out and sheetrocked. however, whoever did the job didnt bother to update that room to 3 wire service.:censored:

Yoyizit 06-10-2009 03:37 PM

Quote:

Originally Posted by gregdonovan (Post 285375)
the inspector mentioned that computers dont like 2 wire service outlets

I think it is a faulty conclusion from symptoms he saw.

rjniles 06-10-2009 03:43 PM

Quote:

Originally Posted by gregdonovan (Post 285375)

am i wrong or do i need to string up a lot more 3 wire outlets? there are some in the house and we plan on adding a bunch of GFCI outlets when we move in.

BTW, Gfci's are a good idea and provide additional personnel safety, but they do not provide a ground. They do nothing to provide protection for a computer or a device with a 3 wire grounded cord.

gregdonovan 06-10-2009 04:06 PM

Quote:

Originally Posted by rjniles (Post 285588)
BTW, Gfci's are a good idea and provide additional personnel safety, but they do not provide a ground. They do nothing to provide protection for a computer or a device with a 3 wire grounded cord.

that is what i figured, thanks for the clarification. the bathroom has 3 wire but no GCFI.:eek:

vsheetz 06-10-2009 10:11 PM

Quote:

Originally Posted by gregdonovan (Post 285611)
that is what i figured, thanks for the clarification. the bathroom has 3 wire but no GCFI.:eek:

The GCFI could be somewhere else, and the outlets in the bathroom are downstream from the GCFI.

jimmy21 06-11-2009 12:42 AM

older computers used to be much more prone to grounding problems. Newer computers it is less of an issue


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