Why aren't all extension cords grounded if it's code that your outlet be grounded?

Ever need an extension cord at home and all you can find are the two- prong type? (My wife seems to buy them in bulk). Why do they even make a 2-prong type when all outlets are supposed to have a ground anyway?
I've told the wife to never buy a 2-prong extension cord.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 4/11/2011 12:55 PM so spake thus:

Short answer: because there are lots of things you can plug in that have 2-prong plugs. (I ASS-ume you're talking about US/North America?). Most of them are perfectly safe and don't need a ground (double insulated, etc.)
The code (NEC) doesn't have total control over each and every device that gets plugged into an outlet. And 2-prong cord sets may still be UL/CSA approved.

I wouldn't sweat it, unless you have a lot of stuff with grounded plugs and have to use lots of 2-to-3-prong adapters (which does get really annoying).
Grounding is a Good Thing, but its benefits are still often wildly overstated. I've worked on plenty of houses around here with old wiring (no separate ground conductor), and for 99% of devices they're perfectly OK. Even computers and other "delicate electronic equipment".
--
The current state of literacy in our advanced civilization:

yo
wassup
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
David Nebenzahl wrote:

I have just blown 2 soundcards, by connecting those two while on 2-prong outlets.......
I replaced the cards, and about 8 2-prong outlets. :)
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 4/11/2011 1:48 PM Sjouke Burry spake thus:

I'm surious: just how did that happen? Did you plug 2 things into two different outlets? Otherwise, hard to see how you could blow a soundcard just by plugging a computer into a 2-prong outlet.
And I'm ASS-u-ming that your new outlets are actually grounded? Of course, installing grounded outlets won't help you in an old house which has 2-wire circuits.
--
The current state of literacy in our advanced civilization:

yo
wassup
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
David Nebenzahl wrote:

Both computers were on 2-prong. In which case (I should have known at the time), there is about half the net voltage on the case, because of the netfilters build into the computer.(duuu...) I connected the line input of one computer to the line out of the other computer, with a 2-male small connector cord. Well, the tip of that connector touches ground on the computerside first, when inserting, inputting ~100 volt into the other computer, and that was definitely that. Now why both cards were gone, is harder to explain, unless the other card had a floating ground, in which case you can kill both cards..... But I have no schematics for those two cards, one of which was build into mother board card. Luckily the bios allowed to disable the malfunctioning chip. 7 euros for one soundcard and an old soundblaster for for the other (old)computer, restored things.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
David Nebenzahl wrote:

The irritation can be removed by the surgical use of a Dremel equipped with a cut-off blade.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Smitty Two wrote:

Ah! Good idea!
I've been perplexed on how to saw off the ground plug on the Dremel itself !
It takes too long to get the machine up to speed and rapidly yank the plug to feed it to the cut-off wheel.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Natural selection will end your genetic code on earth.
If the device you plug in that extension cord has a hot to chassis accidental connection you can get a lethal shock.
gronds are really key to safe operations
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Bigger question:
Why does wife keep buying extension cords?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
so wrote:

Excellent advice. When you've got a 3-prong appliance and only a 2-prong extension, you're possibly at some risk. Better to have any one you grab have the ground IF needed.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 4/11/2011 2:55 PM, so wrote:

why would you waste a three wire cord on a two wire device? Most household devices are just two pronged anyway.
--
Steve Barker
remove the "not" from my address to email
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.