Meg Testing

Can A Home Be Tested For Wiring Damage?

Thankfully, the answer to the question is “Yes”. Meg/Ohm testing is the preferred method of evaluating wiring within a structure. It is used to determine the extent of damage caused by a lightning strike or any other type of power surge to the electrical system.

What Are Some Situations Where MEG/OHM Testing Should Be Performed?

  • Lightning Strike
  • Fire
  • Flooding
  • Any Significant Power Surge Event
  • Older Homes Experiencing Problems With The Electrical System

If you have experienced any of these events, or had any type of significant power surge to your electrical system, we strongly recommend that you have Meg/Ohm testing performed to verify the integrity of the wiring. Compromised electrical wiring can present a very real danger, and should be evaluated and repaired immediately. If you are unsure, it is better to be safe than sorry, when it comes to electrical safety. The good news is, your insurance company will usually cover the cost of this testing, because they also understand the risks involved.

The Testing:

Referred to as Insulation Resistance Testing, Meg Testing, Meg/Ohm Testing, or simply as “Megging” by electricians, it is the most widely used and accepted method to verify wiring integrity within a structure. It is a way to evaluate each individual circuit within the structure, to determine if any of the wiring runs have been compromised. Sometimes wiring damage can be visually observed, but not all wiring in a structure is visible (e.g. inside the walls or under attic insulation). A Meg/Ohm test is used to verify the integrity of the entire wiring run, even the areas that cannot be visually inspected. However, the test is only as good as the tester, and the equipment that he is using.

NOTE: Due to the complexity of this test, and the dangers involved with performing it incorrectly, it is imperative that only a highly qualified professional electrician, possessing the right equipment and the knowledge to properly use it, be allowed to perform this test.

What Are The Basic Steps Of MEG Testing?

  • All electrical current to the structure is shut off.
  • All HVAC (heating and cooling equipment), appliances, other equipment or systems (high or low voltage systems), dimmers, GFCIs, AFCIs, and any equipment that is plugged-in or hardwired, must be disconnected, and power to light fixtures disabled, before the circuits are tested.
  • Next, the MEG testing of the wiring is performed:
    1. High voltage DC current is applied
      For a duration of between one and ten minutes
      Test readings are recorded and evaluated for each circuit
  • Circuit wiring that fails to meet the testing standards should be identified asdamaged, and designated for repair/replacement.
  • When performed correctly, by a skilled professional, this is a very reliable test that will provide you with the information needed to make an educated repair decision.
    NOTE: Right Touch electricians are skilled and professionally trained to perform Meg/Ohm testing, and will be happy to assist with any of your testing or repair needs. As part of our service, we will also provide your insurance company with any required claim information, at no additional charge.

  • At Right Touch Electrical In Houston, Your Safety Is Our Top Priority!!!