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  • Users: biglee82
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  1. biglee82

    Increased Safety Exe and Circuit Breaker Sizing

    Hi all I've had the following put to me and can find no reference in relevant parts of BS EN 60079 (elec apparatus for explosive environments) nor a previous standard BS 5345 (selection, installation and maintenance of ...) We apply a rule of thumb of 4A per mm2 for cables running through...
  2. biglee82

    Cable Installation - Bringing Cables Above Ground

    Gents Folowing a 240mm2 3c 3.3kV cable failure i have been taksed with replacing the cabling of the circuit that experienced the fault. The cables (3 parallel 3c 240mm2 XLPE) run from an incoming 3.5MVA transformer to our 3.3kV Motor Control Centre for a run of approx 50m, with around 30 direct...

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