Two-Prong Outlets in Older Norfolk Homes, Explained
Two-prong outlets turn up in a lot of older Norfolk homes. In Ghent, Colonial Place, Larchmont and many of the brick ranches built across the city in the middle of the last century, at least part of the house still has outlets with only two slots and no round hole for a ground. Some owners have swapped a few of them for three-prong outlets to fit modern plugs, which often makes things look better while making them less safe. This guide explains what those outlets tell you about the wiring, why they matter and the safe ways to bring them up to date.
What the missing third prong means
A modern outlet has three openings. Two carry the power, and the round one connects to a ground wire. The ground gives stray current a safe path back to the panel if something goes wrong inside an appliance, such as a loose wire touching a metal case. Without it, that current can go through whoever touches the appliance instead.
A two-prong outlet means the circuit behind it was installed before grounding was required in homes. It usually also means the wiring is old, often cloth-covered cable or, in the oldest houses, knob-and-tube wiring running on porcelain knobs through the walls and attic.
The problem with a quick swap
The most common shortcut is to replace a two-prong outlet with a three-prong one and connect nothing to the ground screw. The outlet now accepts modern plugs, but the round hole goes nowhere. Anything plugged in looks protected and isn’t. Surge protectors and computer power supplies that rely on a ground can’t do their job either.
A home inspector’s plug-in tester finds these quickly, and they are among the most common items on an inspection report for an older Norfolk house. If you have three-prong outlets in a house you know has old wiring, it’s worth having them checked.
Safe ways to fix it
There are three safe ways to deal with two-prong outlets, and the right one depends on the house and your plans.
- GFCI protection. A GFCI outlet or breaker can be installed on an ungrounded circuit. It cuts the power in a fraction of a second if current leaks where it shouldn’t, which protects people from shock. The outlets then get a “no equipment ground” label. It’s an approved fix, but it doesn’t give electronics a ground.
- Running a ground wire. On some circuits a ground wire can be added from the outlet back to the panel or to a grounded point the code allows. This works well where the walls and the attic or crawl space make the run reachable.
- Rewiring the circuit. Where the wiring itself is worn, replacing the circuit with modern grounded cable fixes the outlet and the wiring behind it in one job. In a house with many two-prong outlets, this often ends up as a partial or full rewire.
Checking what is behind the wall
Before choosing a fix, the electrician needs to know what the wiring is. We open a few boxes, look at the cable and the connections, and check the attic and the crawl space where the runs are visible. Cloth-covered cable that is still flexible and connections that are tight can often stay, with GFCI protection added. Brittle insulation, scorched connections or knob-and-tube wiring that has been buried in insulation are reasons to replace the circuit instead.
Norfolk’s damp crawl spaces add one more thing to check. Old wiring and splices under the house can sit in humid air for decades, and connections there corrode in a way they don’t in a dry attic.
Adapters and power strips are not a fix
A cheater plug, the small adapter that lets a three-prong plug fit a two-prong outlet, does nothing to ground the appliance. Its little tab is meant to be screwed to a grounded cover plate, and in an old house the plate is rarely grounded either. Power strips plugged into ungrounded outlets have the same problem: the surge protection inside them needs a ground to send a spike away. Both are fine for a lamp, and neither makes a computer, a refrigerator or a washer any safer.
Insurers and selling the house
Some insurers ask about the wiring in older homes before they write or renew a policy, and a few won’t cover a house with active knob-and-tube wiring. Buyers’ inspectors almost always note two-prong outlets and ungrounded three-prong ones. A written plan from a licensed electrician, or a closed permit for the work, answers most of those questions quickly.
Where to start
You don’t have to fix every outlet at once. Start where it matters most: the kitchen, the bathrooms, the laundry, the garage and anywhere outdoors, because those are the places water and electricity meet. Then the rooms where computers and televisions live. A good estimate sets out the options side by side, from GFCI protection on the old circuits to replacing them, so you can choose what fits your budget and your plans for the house.
Our rewiring page explains how we approach older houses room by room, and our Norfolk page covers the other work we do across the city. If your house has two-prong outlets and you are not sure what is behind them, book a free estimate and we will take a look.
Questions about this guide
Can I just replace a two-prong outlet with a three-prong one?
Not on its own. A three-prong outlet needs a ground wire behind it to work as designed. Without one, the outlet looks grounded but isn't, which is worse than an honest two-prong outlet. There are safe ways to do it, covered in this guide.
Will two-prong outlets fail a home inspection?
An inspector will note them, and ungrounded three-prong outlets almost always get flagged. They don't usually stop a sale, but buyers and their insurers often ask for a plan or a price to fix them.
Are two-prong outlets a fire risk?
The outlets themselves are not the main risk. The concern is the age of the wiring behind them and the connections in the boxes, which can loosen and run warm after many decades. That's why we check the wiring, not just the outlet.
