Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 12 replies
  • Subscribers 32 subscribers
  • Views 1453 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

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,


Parents
  • 0
    The generator should be fine run at the standby rating. I doubt that it will be called upon for more than a dozen hours a year at the full standby rating. Most failures are in winter when the load is less as space heating and water heating are oil, with LPG for cooking.

    Unless someone has done a load bank test (UNLIKELY) then today was probably the first time that the generator has ever run on full load.

    There is no question of the generator running in parallel with the mains, interlocked changeover contactors.
Reply
  • 0
    The generator should be fine run at the standby rating. I doubt that it will be called upon for more than a dozen hours a year at the full standby rating. Most failures are in winter when the load is less as space heating and water heating are oil, with LPG for cooking.

    Unless someone has done a load bank test (UNLIKELY) then today was probably the first time that the generator has ever run on full load.

    There is no question of the generator running in parallel with the mains, interlocked changeover contactors.
Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines