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Discuss Ring Main Tripping MCB in the Electrical Forum area at ElectriciansForums.net

I

irishsailor

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A friend has just called saying his power circuit keeps tripping the MCB, he said all appaliances are plugged out?

Any suggestions lads

Irish
 
K

kduck

  • Thread Starter Thread Starter
  • #2
You need to ask some BASIC questions first, Has any one been playing with the wiring, is it the upstairs or downstairs ring, if downstairs is it wooden floors.

Number of outcomes downstairs with wooden floors could be water under the house seen this a few times, Rodent damage or even a loose wire.To be honest you would need to test it, Start with basic testing continuity then insulation test. Minimum insulation is 0.5 at 500v test.
 
we're working to the 17th now kduck, minimum IR 1 megohm, latent defect under 2 megohm ;)
 
K

kduck

  • Thread Starter Thread Starter
  • #4
yeah your right sorry 1.0 complies with the 17th
 
G

Guest123

  • Thread Starter Thread Starter
  • #6
Hey chaps.

I'm a little confused, an MCB provides overcurrent protection, where as an RCD provides earth fault protection.

The only time an MCB would operate is under overload conditions. (See below)

Do you mean RCD??

Cheers.

PS, sorry short circuit also, just become a Dad for second time no sleep and too much work....bad combo.
 
Last edited by a moderator:
S

Spudnik

  • Thread Starter Thread Starter
  • #7
MCB does overload and short circuit protection.

Come on. Get it right:D
 
M

Mark2009

  • Thread Starter Thread Starter
  • #8
Hi
Has anyone put a nail through the cable?

Thanks

Mark
 

Had8Lives

-
Arms
Check there's no spurs off the ring. Naughtily connected immersion heater?
 
K

kung

  • Thread Starter Thread Starter
  • #10
Also worth checking i know it sounds silly but he might be confused and think an rcbo is an mcb !
Regards
Kung.
 
Last edited by a moderator:
W

weyboy

  • Thread Starter Thread Starter
  • #11
Test the circuit......!!!
 

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