The IT earthing system, when used properly and in the relevant electrical installations, provides numerous advantages, despite the misconceptions held against it. The main advantage is that it increases the availability of the installation. It helps reduce the risk of fires and explosions. It increases the lifespan of the electrical equipment. It also facilitates preventive maintenance and at the same time optimizes the overall maintenance costs, which means that the initial extra-costs are paid back.
With IT earthing system, the power supply has no point connected with earth (source: Wikipedia)
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