scenaro

[domestic spark]

needs further investigation. Unplug all appliances in kitchen. Clamp meter 1 leg of ring in cu. See if any current flow. Clamp meter other leg . Ditto. Plug in one appliance at a time . Meter both legs ( one then the other, not together. ). Looks like a fair bit of rewiring needed. Get rid of spurs. Maybe the mcb has gone a bit tired after being heavily loaded for so long.

i dont have one

 

[telectrix]

how about 2 4mm radials each on a 32A MCB. that will handle any forseen load.

 

[domestic spark]

how about 2 4mm radials each on a 32A MCB. that will handle any forseen load.

with what is in the kitchen, a 2.5mm ring should suffice.

 

[bugsy]

Find that JB and investigate further ar the end of the day your going have to rewire it anyway

 

[domestic spark]

all i wanted was for post 01 too be read, and that the most probable cause to all this was because the spurred 2.5mm leg was overloaded at times causing MCB too trip? this logic IS possible?

i just didnt want to rewire and the same problem to occur! how silly would I look!

i just want too make sure there was logic in my conclusion!

 

[bugsy]

The mcb ( unless it's knackered ) is tripping through overload, ( you've verified I/R) so obviousley if the connected appliances are exceeding 32a somthing else must be connected to that circuit, if you havent got a clamp meter I suggest you trace all the cables to verify there connections, it is possible the other leg has been used to supply somthing else

 

[domestic spark]

i see. so a 2.5mm leg radial still shouldnt trip the MCB just because the cable its self is being over loaded?

 

[telectrix]

no it shouldn't. the single cable can be overloaded i.e. in excess of 27A, but the MCB will not trip because of this.

 

[bugsy]

yes, the MCB is eated at 32a and in theory you could stick a 30a load on a bit of .75mm cable ( get bloody hot though )

 

[domestic spark]

All clear now, so forget that and i need to investigate what is overloading the circuit.

 

[telectrix]

borrow a clamp meter.

 

[Chr!s]

32 amp Type B, shouldn't trip upto 36 amp within 1 hour , and should trip within 1 hour at 46 amp, now i doubt the ring circuit is being loaded to that degree, washer elements on for what 10-15 MINS MAX, TOASTER 5 mins, what sort of cooker is connected?

Sound more like an L-N fault, possibly on a element?

 

[domestic spark]

cooker NOT connected on kitchen ring

 

[bugsy]

32 amp Type B, shouldn't trip upto 36 amp, and should trip within 1 hour at 46 amp, now i doubt the ring circuit is being loaded to that degree, washer elements on for what 10-15 MINS MAX, TOASTER 5 mins, what sort of cooker is connected?

Sound more like an L-N fault, possibly on a element?

I think if it were it would be self evident

 

[domestic spark]

borrow a clamp meter.

best one for me to get, mite just treat myself? TAR