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Type of insulation of the conductor PvC Thermoplastic Thermoplastic 90°C EPR xLPE Thermosetting Rubber 60°C Thermosetting mineral Conductor cross-sect. mm2 < 300 > 300 Initial temperature °C 7090 60 105 Final temperature °C 160 140 160 140 250 200 160 250 k values Copper conductor 115 103 100 86 143 141 115 135 -115 Aluminium conductor 76 ...
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protection devices - Legrand
www.legrand.be- the tN-S system is inadvisable unless residual current devices with sensitivity iAn <300 mA are added - the tt system is possible (limitation by residual current device) - the it system is recommended in intrinsic safety systems as the 1st fault current can be limited to a very low value (a few mA), to avoid the risk of arcing. Caution:
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