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Share This Page Tweet. The mcb will not move Clip pulled down but no movement on loadstra mcb or on other individual mcb if trying individually to remove even with bus bar screw released. Yes I have thought of it but discounted that as a cause!!

Agree it won’t is highly unlikely! This is crabtree I toggled mcb switch a dozen times! The cable runs are enclosed in plastic trunking so it should not be affected by vermin!!!!

Crabtree Loadstar consumer unit. Changing mcb | Screwfix Community Forum

OP have you tried to remove the breaker? Do you already have an account? Thought it was the pump. Symptoms are this Peter p There is a dedicated mcb for the garden The circuit was installed from new ncb 5 years ago. Disconnected both sockets from junction box. RCDs will also trip if too much current returns via the Neutral, something associated with shared neutrals.

Again thank you all for your help. Yes, my password is: Alun Tom and unphased like this. Thanks peter but no.

It probably easier if you take the bus bar out but when you put it back make sure none of the clamps miss the prong and just tighten up on drabtree. Switch the crabhree off, and inspect all the termination points at the different accessory positions.


BazzaApr 26, For the MCB to be the cause, there would have to be a path for the lost current to take. May I thank you all for you contributions to my query.

Perhaps the UV got to it? Alun TomApr 26, You would spend more lucrative time just visually inspecting all your garden stuff. TBH I think you are better getting someone in for this.

Loadstaar likely to be mcb at fault. Yes my fault re polarity of bus bar!! To do this you would also need to remove the neutral of the suspect circuit.

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You should find water problems in at least one of them. Usually caused by some or all the current leaking to Earth due to a short on either the live or Neutral conductors. Its not, JP, they have special shrouded busbars and a single tab lock-in system unique to the Starbreaker.

The screw is already loose. You must log in or sign up to reply here. Switched off mcb for garden and switch on rcd all ok until mcb switched back on again! Log in or Sign up. Now only the 2.

There is no issue re moisture as this is all in the dry As mcb Has anyone seen this typ3 of thing before?

The circuit is just one twin and earth going directly from mcb to a twin 13a socket which has now been disconnected! Unusual for an MCB to fail, are you sure its not overloaded. Have you had any little furry visitors having a chew at the cable?


Maybe the MCB has another circuit connected to it. Alun Tom likes this. And don’t forget that just switching off the MCB does not fully isolate the circuit. Rcd still tripped immediately whenever mcb was switched on. Today checked again and this time mcb did not trip rcd when switched back on. Yes odd I know! As other poster said that aint the neutral loadstr it is the LIVE busbar. No, create an account now.

crabtree loadstar mcb | eBay

It is a Loadstar. I now need to replace a suspect mcb Looking at the photographs of the cu can you tell me if I need to undo the bottom screw of every mcb in that sector to take off the copper neutral bus bar before I can take out the suspect mcb by pulling down the back release lladstar on the mcb etc.

New cable through house to a junction loadstqr situated under cover in loadshar position supplying two power points to ip67 on house wall One power point supplying small pump Last week rcd tripped. Placed a light attachment to one of the sockets and all was well for some 5 or so hours.

Your name or email address: Does not see daylight! I am glad you corrected me on that issue! I will now get an expert in and see what can be found.

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