OUTLET ANATOMY

Is there really a difference between a 3-prong plug and a 2-prong one? Can I just use an adapter?

 

The answer to a difference is a definite yes. An outlet has three different sized and shaped slots for a few very good reasons. 

 

Let’s start with the two vertical slits. Most all standard 120v electrical devices need a ‘hot’ and a ’neutral’ line to work. The electronics in these devices are sometimes very particular on where they can accept the ‘hot’ line and where they want the ’neutral’ line. To solve this issue, the standard 120v outlet has designated a place for each. As you look closely at the outlet, you’ll notice that the left slit is slightly larger than the right. This side is designed to accept the larger prong on a plug and is designated the ’neutral’ side. The smaller slit to the right is designated the ‘hot’. Now on some electronics, the power input doesn’t matter and the prongs on their plug are the same size. This means you can plug it in either way, it doesn’t matter. Some electronics on the other hand, are particular on how the power is received so the plug will have a larger and a smaller prong to insure that the ‘hot’ line is provided on the correct side since there is only one way to plug the unit in. 

 

Now, for the third and probably most important slot for modern day electronics (and for your safety). The third slot on the bottom, which looks like a circle with a flat side, is the ground. 

 

What exactly is the Ground and why is it so important?

 

The ground on an outlet is designed to be connected from that slot, down to the panel, and ultimately connected to the house’s grounding system. The function of the ground is to minimizes the risk of electric shock and protect electrical equipment from damage. If you have a plug with 3-prongs, it's essential that the outlet your using has a solid ground.