3.3 the size of the circuits and devicesThe level of each connection and related protection deviceTo "use the electrical facilities safety regulations" and the CEI as the standard. Each wire cable has been based on a variety of conditions of fixed current and short circuit current can be accepted at the maximum current level and the relevant voltage drop to develop a variety of 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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