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Meg Testing Circuits

What Is a Meg Test and When Do You Need One?

Electrical wires are covered with insulating material to help protect the conductors, prevent short circuits, and help reduce the chances of electrical fires. But this insulating material can breakdown over time, leaving your home or business at risk. Fortunately, by using a tool called a megohmmeter, our licensed electricians can test the condition of your wire installation (something called meg testing) and determine if your wires are in need of repair.

Meg Testing Reason #1: Lightning Damage

Lightning strikes can damage your home’s electrical system, including the wire and component insulation. This means meg testing is critical following all home lightning strikes. In fact, meg testing and documentation is sometimes required by homeowners insurance providers and code enforcement authorities anytime a home is struck by lightning -- even if no obvious damage is observed.

Meg Testing Reason #2: Melted Wires

The insulation surrounding the wires in your home may melt for a variety of reasons, including poor connections, short circuits, or improper installation. Even high ambient temperatures may cause wire insulation to melt in poorly ventilated areas. But no matter the cause of your melted wires, meg testing can identify the problem so that repairs can be made.

Meg Testing Reason #3: Grounding System

Because your home’s grounding system helps to protect your family, major appliances, and overall electrical system in the case of a fault, it’s vital that it works as intended. Fortunately, meg testing can help spot many potential problems before they occur. Some municipalities even mandate grounding system meg testing as part of their routine inspection and compliance requirements.

Meg Testing Reason #4: Proactive Safety

While there are times in which meg testing is required to address an existing issue, it is never a bad idea to have your home’s wiring meg tested to spot problems before they occur. This is especially true for older homes those in high-risk environments. It’s also a good idea to have meg testing conducted anytime you’re installing new electrical equipment or having your electrical system upgraded.

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