3.3 the size of the circuits and devicesThe level of the wiring and the protective device the electric facilities safety regulations "and the CEI for quasi. Strands of wire and cable has been based on fixed current and short circuit current of various conditions can accept the maximum current level and is related to the voltage drop formulate various sizes.The protection of all kinds of devices should have an extension until the low voltage distribution box is sufficient to cut off and so on, such as ultra more than 50KA and the rest of the electrical box in terms of the capacity of 10KA.
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