If you live in the United States, you’re likely well-familiar with
our typical wall-socket setup. Your plug has two flat pieces of metal
roughly half of an inch wide, with one side sometimes being slightly wider
than the other. Your wall socket has two slots that match this, with one
side also being slightly larger than the other. However, sometimes there’s
a variance: some plugs have a third prong below and between the normal
two, and most electrical sockets also have a third hole to match this
plug. What’s the difference between these two types of plugs and
is one better than the other?
To put it simply, yes, one is better than the other. When it comes to electrical
plugs, the old adage “less is more” does not apply—the
three-prong plug is far better than a two-prong. To learn why, let’s
discuss the difference between the two.
How a Plug Works
In order for electricity to flow, you must complete a circuit. A circuit
essentially is a connection from your power source to the device, and
then from the device back to the power source. The line that brings power
from the power source to the device is called your “hot wire”,
which is most often red and comes off the positive terminal (noted by
the large “+” sign). The line that then returns from the device
to the terminal, usually a black wire connected to a “-“ sign,
is known as the “neutral wire.” A plug must have both of these
lines in order to work.
However, the third prong in a three-prong plug is a “ground”
plug, which dramatically improves safety. When an unexpected burst of
electricity happens, such a short in the device or a surge from your power
supply, the ground plug will take that abundance of additional electricity
and move it away from the device and down into the ground where it is
safe. This prevents your device from being overloaded which can cause
overheating, sparking, and fires in addition to ruining it.
I Have a Two-Prong Plug; What Should I Do?
Three-prong plugs didn’t become the standard in homes in North America
until the late 1960s. If you have a home that was constructed around this
time or after, odds are your wall sockets are probably already of the
three-prong variety. Two-prong plugs can work with three-prong sockets
just fine, and you’ll rarely experience any issues.
However, if you have any old two-prong plugs, you’ll likely need
your electrical system updated in order to upgrade to a three-prong setup.
Properly installing ground wires can involve several hours of electrical
work and even cutting into your walls in order to do so properly, so it’s
a rather large undertaking. However, it’s by far the safest and
most prudent option.
Another option that doesn’t involve tearing open your walls is to
install a ground fault circuit interrupter outlet, otherwise known as
a GFCI. These sockets are two-pronged, but feature a miniature circuit
breaker that measures the resistance through a plug and mechanically shuts
off when the risk of a shock is present. While this can help you avoid
being shocked by a faulty device, there is still no ground wire present
so your electronics are not protected from a power surge.
If you would like to upgrade your old two-prong wall sockets to new, safer
three-prong outlets, call Lightning Bug Electric today by dialing (404)
request an estimate!