More Blog Posts About Electric Panels and Distribution:

  1. How come my generator hookup got tagged as defective by the home inspector?

  2. My circuit breaker won’t reset. What’s wrong?

  3. What are the most common homeowner wiring mistakes?

  4. Is the electric panel big enough for this house?

  5. The electric panel is marked “Trilliant” and it’s all grey plastic. Is it alright?

  6. Why do you pay so much attention to electrical safety?

  7. What is the right electric wire size for a home?

  8. What is a double tap at a circuit breaker?

  9. Can an electric panel be mounted sideways-horizontally?

  10. Why does that wall plug have push-buttons in the middle?

  11. What is a three-way switch?

  12. Is an ungrounded receptacle/outlet dangerous?

  13. How do the new tamper-resistant electric receptacles work?

  14. Does this place have one of those “bad” electric panels I’ve heard about?

  15. I heard that aluminum wiring is bad. Do you check for it?

  16. What is a split bus electric panel?

  17. What is reversed polarity at an outlet/receptacle? Why is it dangerous?

  18. Why does the bedroom have a light switch but there is no light in the ceiling?

  19. How far apart should kitchen counter receptacles be placed?

  20. How can I figure out what a mystery wall switch does?

  21. What is the switch on the wall with only two pushbuttons for?

  22. What are those strange looking wall switches in houses from the 1950s and 1960s?

  23. What is a lock device on a circuit breaker for?

  24. Can multiple neutral or ground wires be secured under the same terminal in an electric panel?

  25. Why are Zinsco and Sylvania-Zinsco electric panels a problem?

  26. Can wiremold be used at an exterior location?

  27. What is the life expectancy of electrical wiring in a house?

  28. How can adding wood paneling or a wainscot create an electrical safety hazard?

  29. What are the most common electrical defects found in a home inspection?

  30. What is an open electrical splice?

  31. Why is an old fuse panel dangerous?

  32. What does it mean when a wire is “overstripped” at a circuit breaker?

  33. What is the difference between “grounded” and “grounding” electrical conductors?

  34. What is the difference between a Combination Arc Fault Circuit Interrupter (CAFCI) and an Arc Fault Circuit Interrupter (AFCI) circuit breaker?

  35. How can I tell if a receptacle/outlet is tamper resistant?

  36. What is a Dual Function Circuit Interrupter (DFCI)?

  37. Will a GFCI receptacle that is not grounded still function properly?

  38. Does a home inspector remove the electric panel cover plate and examine the inside of the panel?

  39. What are the most common defects with over-the-range microwaves?

  40. Can an electric panel be located over stairs?

  41. Is a house required to have outdoor electric receptacles?

  42. What are the code requirements for NM-cable (nonmetallic-sheathed cable or Romex®) in an attic?

  43. How can I change a 240V circuit to a 120V circuit?

  44. Can old electrical wiring go bad inside a wall?

  45. What could cause an extremely high electric bill?

  46. Why are extension cords dangerous?

  47. What problems does having too many electrical outlets on a single circuit cause?

  48. How can I find out the size of the electric service to a house?

  49. What happens when you press the “TEST” button on a circuit breaker in an electric panel?

  50. How many electric receptacles (outlets) are required in a hallway?

  51. Why does painting an electric receptacle (outlet) make it unsafe?

  52. What is the difference between GFCI and AFCI circuit breakers?

  53. What causes flickering or blinking lights in a house?

  54. Why are some electric receptacles/outlets upside down (ground slot up) in a house?

  55. Why is a fuse box an insurance problem for homebuyers?

  56. What is a “backstab” receptacle outlet?

  57. What electrical hazards does a Ground Fault Circuit Interrupter (GFCI) not protect against?

  58. What are the right words for talking about a house electrical system?

  59. What does “listed” and “labeled” mean for an electrical component?

  60. What does it mean when I find buried yellow "CAUTION" tape when digging a hole in the yard?

  61. How far away should a sink be from an electric panel?

  62. What are the requirements for NM-cables entering an electric panel box?

  63. How can I tell if the electrical service is 3 phase or single phase?

  64. What is the building code requirement for receptacle outlets at stairs and stair landings?

  65. Can a home surge protector be installed loose in the bottom of an electric panel box?

  66. Can a bare bulb “lampholder” light fixture be installed outdoors?

  67. When did arc fault circuit interrupter (AFCI) breakers first become required?

  68. What is the difference between an electrical receptacle, an outlet, and a plug?

  69. Should I buy a house near a high-voltage power line?

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We want you to be an informed homebuyer, and each blog post is a question that we have answered for our friends and customers over the years. Hope they help you make a good choice for your next home.

lack of ground. Unfortunately, this little tester does not detect what is called a “false ground,” a condition in which the ground slot is connected to the neutral wire in the circuit—which is also an unsafe. Detecting a false ground requires a more sophisticated electronic testing device.

   There are three safe and code-approved ways to repair an ungrounded three-slot receptacle:

  1. 1)Run a ground wire to the new three-slot receptacle. This is often the most difficult and expensive solution.

  2. 2)Install a GFCI (Ground Fault Circuit Interrupter) receptacle. It’s the kind with two small push-buttons in the center. A GFCI shock-protection device is considered an acceptable alternative to a ground connection, but the receptacle cover plate must have a small sticker (provided in the box with the receptacle) attached that says “NO GROUND PROVIDED.”

  3. 3)Replace it with a two-slot receptacle, which is still manufactured and available on the shelf at many hardware stores. If not, they can special-order it for you. Since having just one three-slot receptacle in each room is adequate for most homes, this solution is satisfactory for many of the ungrounded three-slot receptacles.


Many appliances require a ground connection to operate properly and have a manufacturer’s sticker, like the one shown below on side of a fluorescent ceiling fixture, that states “FIXTURE MUST BE GROUNDED for safety and proper operation.”



While we hope you find this series of articles about home inspection helpful, they should not be considered an alternative to an actual home inspection by a local inspector. Also, construction standards vary in different parts of the country and it is possible that important issues related to your area may not be covered here.
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