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Service cable and cut out too hot.

broadgage
I was called by a local hospice to investigate "overheating" and found the DNO service cable and cut out to be alarmingly hot, I would estimate the surface temperature of the service cable to be at least 60 degrees. Definite smell of hot PVC.

Enquires suggested that the supply was originally 60 amps, single phase and was upgraded to 100 amps by fitting a larger fuse.


Measured load was just just under 100 amps, it probably exceeded 100 amps if anyone used a kettle.Service cable looks like only about 10mm. Voltage is rather low at 221 volts, but just within tolerance.


Is it worth calling the DNO, or will they simply say "supply working, do not worry" I suspect that the service cable is very undersized, but am aware that DNOs work to different rules.


I have moved combustibles away from the cable and advised reducing the load a bit,


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  • Former Community Member
    0 Former Community Member

    This might apply:

    Standby power rated generators are the most commonly rated generator sets. Their primary application is to supply emergency power for a limited duration during a power outage. With standby rated generators there is no overload capability built into the units. It is important to note that standby rated generators, under no circumstances, should run in conjunction with a public utility source.


    Standby power rating should be applied to the unit where public utility power is available. The typical rating for a standby engine should be sized for a maximum of 80% average load factor and roughly 200 hours per year. This includes less than 25 hours per year of running time at the standby rating. Standby power ratings should never be applied except in true emergency outage situations. Predetermined outages with the utility company, under UL guidelines, are not considered emergency outages. Manual load shifts for testing purposes can be performed with most automatic transfer switches.


    Regards


    BOD


Reply
  • Former Community Member
    0 Former Community Member

    This might apply:

    Standby power rated generators are the most commonly rated generator sets. Their primary application is to supply emergency power for a limited duration during a power outage. With standby rated generators there is no overload capability built into the units. It is important to note that standby rated generators, under no circumstances, should run in conjunction with a public utility source.


    Standby power rating should be applied to the unit where public utility power is available. The typical rating for a standby engine should be sized for a maximum of 80% average load factor and roughly 200 hours per year. This includes less than 25 hours per year of running time at the standby rating. Standby power ratings should never be applied except in true emergency outage situations. Predetermined outages with the utility company, under UL guidelines, are not considered emergency outages. Manual load shifts for testing purposes can be performed with most automatic transfer switches.


    Regards


    BOD


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Community Rules & Guidelines