How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask George-Allsorts Your Own Question

George-Allsorts
George-Allsorts, Senior Appliance Technicial Manager
Category: Appliance
Satisfied Customers: 1448
Experience:  A whitegoods technician with 30+ years service in Domestic Appliance Service & Repair, and General Mechanical & Electrical Repair
19471162
Type Your Appliance Question Here...
George-Allsorts is online now

New bosch hob tripping RCD 70V between case and earth if you

Resolved Question:

New bosch hob tripping RCD 70V between case and earth if you disconnect the earth on the hob and test between the two

Submitted: 1 year ago.
Category: Appliance
Expert:  George-Allsorts replied 1 year ago.
Hello, my name is George..

Can you give the ENR of the appliance please.. It will be on a label underneath the hob.

Kindly be patient whilst awaiting any responses from me as I'm not constantly available.
Customer: replied 1 year ago.

Hi

ERN:PKE611D17E /01 FD9502

Regards

Darren

Expert:  George-Allsorts replied 1 year ago.
First port... Check that the earth is valid at the connection point at the wall
Customer: replied 1 year ago.

Earth has been tested I even tested the case (with earth disconnected) to the earth on the ring main at that showed the same voltage.

Live to earth 230v with the cable taken out of the hob and tested.

Expert:  George-Allsorts replied 1 year ago.
If you are sure that the earth in the ring main is good, and you have your wiring in the connector block correct, then return the product as fauty.
Customer: replied 1 year ago.

Hi Thanks

I am a qualified Electrician but not have done a lot with white goods, the Consumer unit has just been installed 17th edition with two rcd's just wondering if you came across this before.

Regards

Darren

Expert:  George-Allsorts replied 1 year ago.

Normally this would only happen if the interior earth on the appliance failed or if the earth circuit of the property was defective at the point of connection or further.

Problem is, if you open it up to check the earth and find a defective element or something else, you would have invalidated your warranty to get it repaired/replaced

Customer: replied 1 year ago.

Thanks every thing works ok ,washing machine ,dishwasher shower etc. just the hob trips it .Thanks for advice have been on some forums and this has happened before due to a RCD being installed .

Expert:  George-Allsorts replied 1 year ago.
The RCD being installed should not create this problem... Is there an explanation given for the theory?
Customer: replied 1 year ago.

all they say all other appliances may be eating into the tolerance of the RCD ...One even said the service engineer got a belt of a case (80V) on the case..

Expert:  George-Allsorts replied 1 year ago.
It doesn't sound like it is anything to do with the RCD to me.

The fault is an earth fault... There is no argument over that.. It sounds like the appliance is not earthed.

To me it sounds like the earth route to the consumer unit from the appliance is interupted.

Question: does the RCD trip when any other device is operated?
George-Allsorts, Senior Appliance Technicial Manager
Category: Appliance
Satisfied Customers: 1448
Experience: A whitegoods technician with 30+ years service in Domestic Appliance Service & Repair, and General Mechanical & Electrical Repair
George-Allsorts and other Appliance Specialists are ready to help you
Customer: replied 1 year ago.

No only if the hob is connected..

Expert:  George-Allsorts replied 1 year ago.

If the hob is disconnected, you need to put an insulation tester on the feed cable to the appliance. Neg on earth, and live on both neutral and live together, or separately..
Something like a 500v megger would do the job

Let me know what readings you get

What Customers are Saying:

 
 
 
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy
< Previous | Next >
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
 
 
 

Meet The Experts:

 
 
 
  • Rob

    Rob

    Home Appliance Technician

    Satisfied Customers:

    420
    20 yrs. experience with a major worldwide manufacturer.
< Previous | Next >
  • http://ww2.justanswer.co.uk/uploads/RO/royzee1/2012-10-11_16153_serviceengineers.64x64.jpg Rob's Avatar

    Rob

    Home Appliance Technician

    Satisfied Customers:

    420
    20 yrs. experience with a major worldwide manufacturer.
  • http://ww2.justanswer.co.uk/uploads/NE/needapplianceparts/2012-11-9_15310_rickcannon.64x64.jpg Appliance Parts's Avatar

    Appliance Parts

    Home Appliance Tech

    Satisfied Customers:

    82
    Appliance tech since 1992. Factory authorized
  • http://ww2.justanswer.co.uk/uploads/JG/jgrella16/2011-9-12_73730_justanswerheadshot.64x64.jpg Jon's Avatar

    Jon

    Home Appliance Technician

    Satisfied Customers:

    1535
    Home appliance technician with over 12 years experience.
  • http://ww2.justanswer.co.uk/uploads/SE/secondhandheaven/2014-11-23_141828_lge.64x64.jpg George-Allsorts's Avatar

    George-Allsorts

    Home Appliance Technician

    Satisfied Customers:

    1123
    A whitegoods technician with 30+ years service in Domestic Appliance Service & Repair, and General Mechanical & Electrical Repair
  • http://ww2.justanswer.co.uk/uploads/RE/repairman4734/2011-5-21_171048_FarrellPic.64x64.png repairman4734's Avatar

    repairman4734

    Home Appliance Technician

    Satisfied Customers:

    684
    Thank you for your question, it is appreciated
  • http://ww2.justanswer.co.uk/uploads/drcool299/2008-12-16_113651_francis.jpg drcool299's Avatar

    drcool299

    Home Appliance Technician

    Satisfied Customers:

    22
    I have been an Appliance tech for the past 15 years. Worked on most of the branded appliances.
  • http://ww2.justanswer.co.uk/uploads/AS/asterixt/2015-8-31_143917_pic.64x64.jpg Michael's Avatar

    Michael

    Customer Service

    Satisfied Customers:

    2970
    I have been an appliance repair tech for over 30 years and will help you solve your problems.
 
 
 

Related Appliance Questions