? is a term used to describe an electrical product designed so that a single ground fault cannot cause a dangerous electrical shock through any exposed parts of the products that can be touched by an electrician.

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Double insulated is a term used to describe an electrical product designed so that a single ground fault cannot cause a dangerous electrical shock through any exposed parts of the products that can be touched by an electrician.

The number one reason to test insulation is to ensure public and personal safety. By performing high voltage testing between the dead life and grounded conductors the possibility of life-threatening short circuits or ground faults can be eliminated.

Care should always be taken not to measure the insulation resistance when the temperature is below the dew point. This is the easiest method. Apply the test voltage briefly and record the measured insulation resistance at this point. Network connections are generally of two types: peer-to-peer and network-sharing environments.

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