Tvad - ground adapter plugs are sold so that you can connect a device requiring a safety ground connection to an outlet that does not have a 3rd ground pin, but HAS A GROUNDED OUTLET BOX. It is not designed to allow a device requiring a safety ground to be used without such a ground.
A grounded outlet box is one where the box itself is grounded. If properly grounded, the wallplate screw will be a path to earth.
That is why the adapter plug has a metallic clip or pigtail to connect to the grounded wallplate screw. It is permissible to use this approach, thus the adapter plugs are legal to sell.
Using the adapter plug without connecting to ground is "cheating," which is why it's called a "cheater" plug. Using it to defeat the ground is against NEC. NEC has the force of law in pretty much every locale in the US, so it's illegal to use a ground adapter as a "cheater" plug.
Also, installing new outlets without proper grounding, as you suggest, is illegal, incredibly dangerous, and stupid. If you had a problem because of the installation of an illegal electrical system, your homeowner's insurance could legally refuse to pay any claim.
A grounded outlet box is one where the box itself is grounded. If properly grounded, the wallplate screw will be a path to earth.
That is why the adapter plug has a metallic clip or pigtail to connect to the grounded wallplate screw. It is permissible to use this approach, thus the adapter plugs are legal to sell.
Using the adapter plug without connecting to ground is "cheating," which is why it's called a "cheater" plug. Using it to defeat the ground is against NEC. NEC has the force of law in pretty much every locale in the US, so it's illegal to use a ground adapter as a "cheater" plug.
Also, installing new outlets without proper grounding, as you suggest, is illegal, incredibly dangerous, and stupid. If you had a problem because of the installation of an illegal electrical system, your homeowner's insurance could legally refuse to pay any claim.