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How Do I Add Ground to an Old House?

Mister Sparky Electrician Pete in front of his vanHow do I add ground to an old house?

If you’ve got an older home with those two-pronged outlets everywhere, we need to talk about electrical grounding. I know electrical work isn’t the most exciting topic, but trust me, this is important for keeping your family safe.

Think of electrical grounding as a safety net for your home’s electrical system. You know those three-prong outlets you see in newer homes? That third prong isn’t just there for looks. It’s actually a crucial safety feature that can prevent electrical shocks and fires. Without proper grounding, electricity might decide to take an unexpected path through something (or someone!) it shouldn’t.

But how do you know if your house is grounded correctly?

Grounded Outlets

The quickest way to check your grounding is just to look at your outlets. If you’re seeing only two slots instead of three, you’ve got ungrounded outlets. But, even if you see three slots, that doesn’t automatically mean you’re in the clear. Sometimes, people install three-prong outlets without actually grounding them (yikes!).

Want to be sure? You’ve got a couple of options:

  • Grab a three-prong tester from your local hardware store (they’re pretty cheap and super easy to use)
  • If you want to get fancy, use a multimeter to check the voltage and grounding

Options for Grounding Two-Prong Outlets

Don’t panic! You’ve got several ways to fix this situation. Let’s break down your options from most thorough to most practical:

  1. The Gold Standard: Install New Grounded Circuits This is like giving your house’s electrical system a complete upgrade. It means running new wires from your electrical panel to each outlet. Yes, it’s the most expensive and messy option (think holes in walls), but it is also the most comprehensive solution.
  2. The Smart Alternative: GFCI Outlets These clever devices act like tiny lifeguards for your electrical system. They can’t provide true grounding, but they’ll shut off power instantly if something goes wrong. It’s a great middle-ground solution that doesn’t require tearing up your walls.
  3. The Lucky Break: Metal Box Grounding If your outlet boxes are metal and already grounded (fingers crossed!), you can ground your outlet right to the box. It’s the cheapest fix, but only works in specific situations.

Steps for Replacing Two-Prong Electrical Outlets

This isn’t your typical weekend DIY project. While replacing an outlet isn’t rocket science, working with electricity is dangerous if you don’t know what you’re doing. If you’re determined to try it yourself, here’s the basic process:

  1. First things first – kill the power! And please, double-check with a voltage tester. Better safe than sorry!
  2. Take out the old outlet (carefully – those old wires can be fragile)
  3. Look for a ground wire (it’s usually bare copper or green)
  4. Install either a regular three-prong outlet (if you have a ground wire) or a GFCI outlet
  5. Connect everything up properly
  6. Test it thoroughly before celebrating

When to Call a Professional

Look, there’s no shame in calling an electrician for this kind of work. In fact, it’s often the smartest move, especially if:

  • You’re not entirely confident about electrical work
  • Your house has really old wiring (especially that knob-and-tube stuff – that’s definitely pro territory)
  • You need to run new wiring through walls
  • You want to upgrade multiple outlets or tackle other electrical projects at the same time

Finding the right electrician matters, too. Look for someone who’s licensed, bonded, and insured; that’s non-negotiable. And if possible, find someone with experience providing electrical grounding services to older homes. They’ll understand the quirks and challenges that come with vintage wiring systems.


Living with ungrounded outlets is kind of like driving without a seatbelt. Sure, you might be fine most of the time, but why take the risk? Whether you decide to tackle this yourself or bring in a pro, the important thing is getting it done.

Start by making a simple map of all your ungrounded outlets. Prioritize the ones where you plug in expensive electronics or appliances; these are your high-risk areas. You don’t have to fix everything at once; room-by-room upgrades are fine if that suits your budget better.

Remember: If you’re ever unsure about electrical work, don’t take any malarky – call Mister Sparky.