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 28 replies
  • Subscribers 32 subscribers
  • Views 2443 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

BIG BIG Range Cooker.

Zoomup
I wired up a big range cooker today in a new house. 14kW ish. A 32 Amp 6.0mm2 circuit. Final meter of T&E in 4.0mm2. The big worry is that we could not find a cooker switch on the wall anywhere, just the cooker connection plate. Perhaps not needed by the Regs. nowadays, but nice to turn off when cleaning the cooker, servicing it or in case of emergency, or last thing at night to stop children fiddling.


I warned the owner that it is not a good idea to turn on all ovens and hobs at once.


Z.
Parents
  • 0
    Grumpy:
    Zoomup:

    I wired up a b


    I warned the owner that it is not a good idea to turn on all ovens and hobs at once.


    Z.


    Why did you do that Zoomy?




    To cover myself and to be helpful. 58 Amps of possible load if all heating elements are turned on, and the two ovens are warming up, say initially before thermostats cut anything out, could trip the 32 Amp M.C.B. after a few minutes. Also the M.C.B. when in use is likely to run warm and become more sensitive to load currents. Or if the thing has all controls turned on and the supply is interrupted and then the whole beast demands full plated current when the supply is reinstated it may trouble the M.C.B.


    Diversity is a gamble. There could be a time when all heating elements are in use and demanding current.


    I note that B.S. 7671 does not have a definition for "diversity" any more.


    Also, the new house is a small modern wooden framed bungalow type and may not have a full 100A main fuse.


    Z.


     


Reply
  • 0
    Grumpy:
    Zoomup:

    I wired up a b


    I warned the owner that it is not a good idea to turn on all ovens and hobs at once.


    Z.


    Why did you do that Zoomy?




    To cover myself and to be helpful. 58 Amps of possible load if all heating elements are turned on, and the two ovens are warming up, say initially before thermostats cut anything out, could trip the 32 Amp M.C.B. after a few minutes. Also the M.C.B. when in use is likely to run warm and become more sensitive to load currents. Or if the thing has all controls turned on and the supply is interrupted and then the whole beast demands full plated current when the supply is reinstated it may trouble the M.C.B.


    Diversity is a gamble. There could be a time when all heating elements are in use and demanding current.


    I note that B.S. 7671 does not have a definition for "diversity" any more.


    Also, the new house is a small modern wooden framed bungalow type and may not have a full 100A main fuse.


    Z.


     


Children
No Data

Community Rules & Guidelines