1. 3)Rodents or squirrels in the attic gnawing on the wires can also be a problem, although we see this issue rarely. But we look for damaged wires, like in the photo below, whenever evidence of animal activity in the attic is found, such as urine stains, fecal pellets, and nesting material.


    Because wiring inside a wall is not accessible without tearing out wallboard, it is entombed and protected in place for life. Only an unlucky nail into a stud without the required protective plate over the electric cable crossing point has the potential to damage the wiring. Any electrical shorts or arcing inside a wall are more probable around the connections at the outlet and switch boxes that are accessible to meddling by weekend warrior home-improvers.

    To read more about the problems encountered with vintage residential electrical systems see our blog posts  What is the life expectancy of electrical wiring in a house?” and “How dangerous is old electrical wiring?”. Thinking about rewiring your home? See our blog post “How much does it cost to rewire a house?”.



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.
©2016 - McGarry and Madsen Inspection

 
 

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HOME INSPECTION
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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.


More blog posts about electric service and distribution:

  1. What is the best emergency back-up generator for the power outage after a storm?

  2. How can I tell if the electric outlets are grounded?

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

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

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

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

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

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

  9. What is the life expectancy of a circuit breaker?

  10. What is a split bus electric panel?

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

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

  13. Is a bare bulb light in a closet alright?

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

  15. My bathroom electric receptacle/outlet is dead, and there is no tripped breaker in the electric panel. What’s wrong?

  16. What is a “missing twistout” at an electric panel?

  17. Where are smoke alarms required to be located?

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

  19. How far apart should electric receptacle outlets be placed in a garage?

  20. Will the electric company remove branches rubbing against the overhead service lines to my home?

  21. What is the lock device on a circuit breaker for?

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

  23. Can wiremold be used at an exterior location?

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

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

  26. What is an open electrical splice?

  27. Why is an old fuse panel dangerous?

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

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

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

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

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

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

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

  35. Can an electric panel be located over stairs?

  36. Does a GFCI-receptacle that is not grounded still function properly?

  37. Is a house required to have outdoor electric outlets?

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

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

  40. What could cause an extremely high electric bill?

  41. How do I trace and identify each circuit breaker in my electric panel to make a circuit directory?

  42. Why are extension cords dangerous?

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

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

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

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

  47. Why are electrical outlets and plugs polarized?

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

  49. When was the three slot (grounding) outlet/receptacle first required?

  50. Why are old electric components not always “grandfathered” as acceptable by home inspectors?

  51. When were GFCI receptacle outlets first required?

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

  53. Why is bundled wiring in an electric panel a defect?

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

  55. Why is undersize electric wiring in a house dangerous?

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

  57. What is a “backstab” receptacle outlet?

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

  59. What is the color code for NM cable (Romex®) sheathing?

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

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

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

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

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

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

  66. What is the minimum clearance of overhead electric service drop wires above a house roof?

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

  68. Can you add circuit breakers by different manufacturers to an electric panel if they fit?

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

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

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

  72. When should I replace electric receptacle outlets?

  73. What is a “while-in-use” weatherproof electrical receptacle outlet cover?

  74. When should a corroded or damaged electric panel cabinet or disconnect box be replaced?

  75. What is the maximum number of circuit breakers allowed in an electric panel?

  76. Why do home inspectors get so picky about calling out minor electrical safety defects?

  77. Which house appliances need a dedicated electrical circuit?

  78. What causes copper wires to turn green or black in an electric panel?

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