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  1. faraway73

    Connecting different sized cables

    Just wondering how everyone would connect a 120mm2 2C+E cable (Cable 1) to a 16mm2 cable 2C+E(Cable 2). Cable 1 is from the switchroom (upstream CB is 32A) to a remote room (very long run I have been told) and is 120mm2 for volt drop. Both cables are copper. Once Cable 1 enters the remote room...
  2. faraway73

    Non synchronous power sources

    I am testing a transfer switch that is supposed to be able to handle two single phase sources that are asynchronous, and switch seamlessly from the first source to the second when the first one fails. In our office we have a three phase supply. So if I took one single phase supply off red to...
  3. faraway73

    Protection of ELV circuits

    Thanks all, the datasheet does state that the PSU has overload (constant current limiting) protection that limits the PSU to 150% of the rated output power. The units rated power is 75W and rated current at 24V is 3.2A. This means that in short circuit condition, the current is limited to 150%...
  4. faraway73

    Protection of ELV circuits

    Hi Everyone I am new to the forums and would like some advice for circuit design. I have an AC/DC (240VAC/24VDC) power supply unit supplying one DC circuit. My question is, should I have a circuit breaker on the DC side to protect the DC circuit? And if a circuit breaker is required on the...

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