The dryer plug will not fit the receptacle in our new house. How can I remedy this?

In most new homes, there should be four-prong dryer and range receptacles. If you have a three-prong power cord, you will need to change it.

What is a polarized plug?

One prong is bigger than the other. This feature is designed to make sure that a 110-volt plug is never put into a socket that is not a 110-volt outlet.

Will a three-pronged plug adapter protect me against electrical shock when I use it in a two-prong receptacle?

Only if the wall plate screw is grounded.

What is the easiest way to test an outlet?

Use a receptacle analyzer. Leave the power on, but make sure nothing is plugged into any outlet on the circuit, and turn off all switches on the circuit. Now, plug the analyzer into the outlet. A series of lights will tell you if the outlet is wired correctly and working.

What is a ground fault interrupter?

It's a safety device that shuts off the power if a wire in an outlet develops a leak that could electrocute someone. This hazard is so serious that the National Electrical Code requires all new homes be equipped with them in the bathroom, kitchen, workroom, outdoor, basement, garage and swimming pool circuits.

Do all of the outlets in my kitchen need to have ground-fault circuit interrupters?

No, if the first in the series is GFCI, then all are protected.

I need to install a receptacle for my kitchen range. Is it okay to use one designed for a dryer?

No, they may look similar, but they have different features. Make sure you check the manufacturers' label to ensure you are buying one that is rated for the proper amperage.

Is there a special receptacle I should install outside?

Yes, there is a special box with a cover designed to protect. In addition, the receptacle should also have ground-fault circuit-interrupt protection.

I have some tools that have three prongs, but the outlet I want to use has only two prongs. Can I safely cut the extra prong off?

No, the third prong is the grounding prong. If you cut it off or use a plug adapter that is not grounded, you will disable a feature that is designed to protect against electrical shock.

Why do some appliances and tools only have two prongs and no grounding prong?

These products are "double-insulated" and do not need the added protection of a grounding plug. You can plug them into ungrounded outlets and still be protected. I've noticed that some outlets have a T-shaped neutral slot. What does this do? It identifies the outlet as a 20-amp grounded receptacle and it should be used only on 20 amp circuits.