InterceptRadio.com Forums

There are three reasons for the holes:

* If you were to take apart an outlet and look at the contact wipers that the prongs slide into, you would find that they have have bumps on them. These bumps fit into the holes so that the outlet can grip the plug’s prongs more firmly. This detenting prevents the plug from slipping out of the socket due to the weight of the plug and cord. It also improves the contact between the plug and the outlet.

* Electrical devices can be "factory-sealed" or "locked-out" by the manufacturer or owner using a plastic tie or a small padlock that runs through one or both of the prong holes. Construction projects or industrial safety requirements may require this type of sealing. For example, a manufacturer might apply a plastic band through the hole and attach it to a tag that says, "You must do blah blah blah before plugging in this device." The user cannot plug in the device without removing the tag, so the user is sure to see the instructions.

* There also is a small savings in raw materials (metal) for the manufacturer of the actual plug prong. Every little bit helps!

_________________
If I had an antenna, I would; but I can only transmit on 160 meters.
_____
DE K7MHI

I was going to guess it makes jerry rigging a jumper cord easier as you can wrap the wire around the hole...

_________________
Mt Wave SAR member
Support Search & Rescue: Get Lost!
http://www.mwave.org

I thought they were vent holes that allowed air to pass thru to keep the plug cool, like the vent holes in a rotor for a car .

Why do doughnuts have holes?

_________________
" SILENCE IS CONSENT "

Made to Government Specs:
1) Measured with a micrometer.
2) Marked with a chalk.
3) Cut with an axe.

Jim N7UAP - Bellingham, WA / InterceptRadio.com

Give them credit :D

http://home.howstuffworks.com/two-flat- ... -holes.htm


Also found this...

http://cr4.globalspec.com/thread/7948


Everything you ever want to know about plugs....

http://users.telenet.be/worldstandards/electricity.htm

_________________
" SILENCE IS CONSENT "

Made to Government Specs:
1) Measured with a micrometer.
2) Marked with a chalk.
3) Cut with an axe.

Jim N7UAP - Bellingham, WA / InterceptRadio.com

haha wondered if anyone would mention that.. I was lazy and thought eh.. .who cares haha

http://users.telenet.be/worldstandards/electricity.htm

_________________
If I had an antenna, I would; but I can only transmit on 160 meters.
_____
DE K7MHI