Over sensitive EHU RCB?

[Paul Wilkins]

Good afternoon fellow 'Funsters'.
On a couple of sites now my Bailey AA794 has tripped the EHU RCB on the post. Not immediately, but perhaps a 15 mins or so after hooking up. Firstly, I thought that perhaps I was on a low amp supply and tripped it when the heating and the kettle were on at the same time. However, having swapped to another socket on the same post, it doesn't trip.
This has happened on three occasions now and I'm starting get a little paranoid. Is it the bus? Is it the post?
I've read articles relating to the Alde boiler/heater and the various 'stages' of elements that are used and that these can 'break down' over time. Yet, the EHU/RCB where I store the bus has never given any trouble when its hooked up all the time with the heater set at 10C.

Is it me... or is it them?

 

[pappajohn]

Does sound like weak breakers.

 

[SpeedyDux]

I hope you let the Wardens know so they can get an electrician to fix the EHU bollard.

There are some faulty ones.

 

[Paul Wilkins]

I hope you let the Wardens know so they can get an electrician to fix the EHU bollard.

There are some faulty ones.

Yes I have done in the past, never got any thanks for doing so though..

 

[stevewagner]

Good afternoon fellow 'Funsters'.
On a couple of sites now my Bailey AA794 has tripped the EHU RCB on the post. Not immediately, but perhaps a 15 mins or so after hooking up. Firstly, I thought that perhaps I was on a low amp supply and tripped it when the heating and the kettle were on at the same time. However, having swapped to another socket on the same post, it doesn't trip.
This has happened on three occasions now and I'm starting get a little paranoid. Is it the bus? Is it the post?
I've read articles relating to the Alde boiler/heater and the various 'stages' of elements that are used and that these can 'break down' over time. Yet, the EHU/RCB where I store the bus has never given any trouble when its hooked up all the time with the heater set at 10C.

Is it me... or is it them?

RCD’s trip with an earth fault. Overloads and short circuits trip MCB’s

^{_{Subscribers  do not see these advertisements}}

 

[Paul Wilkins]

RCD’s trip with an earth fault. Overloads and short circuits trip MCB’s

TBH I don’t know what they are on EHU posts.
“D**n it Jim, I’m a doctor not an engineer”

 

[stevewagner]

TBH I don’t know what they are on EHU posts.
“D**n it Jim, I’m a doctor not an engineer”

Usually there would be an RCD and an mcb

 

[Paul Wilkins]

Usually there would be an RCD and an mcb

Well whatever it is on the post.. it trips and cuts off the power.

 

[Lenny HB]

Had an EHU in Spain a couple of weeks ago, all 2
10 amp MCB's first two outlets I tried tripped with a 3 amp load 3rd one was OK.

 

[ramsthom]

What size kettle (wattage) and what setting did you have the heating on. It could add up to more than the EHU post output.

^{_{Subscribers  do not see these advertisements}}

 

[Paul Wilkins]

What size kettle (wattage) and what setting did you have the heating on. It could add up to more than the EHU post output.

It’s a ‘camping’ kettle, so not Uber amps. Heating set at 2kw

 

[stevewagner]

That would be around 13amps with both in use. On a 10 amp supply that would trip the MCB after a while. You are saying that the posts had RCB’s but I’m assuming you mean RCD’s. An RCBO is an RCD with overcurrent protection which is a sort of cross between an RCD and an MCB. I suspect there is either a loose cable in your set up or the feeder post. I would suggest you take the front of your consumer unit ( while disconnected) and check every terminal for tightness. This should eliminate any issues your end.
If the supply was only 10 amps and the post was fitted with an RCBO then I would expect it to trip after a while.

 

[ramsthom]

Highly likely in Spain the site voltage could have been low which would increase the amperage. Have known it to go as low as 200 volts if the demand is high.

 

[autorouter]

Highly likely in Spain the site voltage could have been low which would increase the amperage. Have known it to go as low as 200 volts if the demand is high.

Sometimes it does, sometimes it doesn't. Devices with electronic controls inside them can increase the amperage to compensate for low voltage and keep the power the same. Battery chargers, laptop chargers, TVs etc. For devices that are basically heaters, if the voltage drops by 10% the amps also drops by 10%, and the power drops by about 20%. Kettles, fan heaters, electric elements for example.