Here are some information and understanding about RCCB.

 RCD_The_Best_Way_To_Guarantee_Electrical_Safety_At_Home1.pdf ( 60.29k ) Number of downloads: 939
 RCD_The_Best_Way_To_Guarantee_Electrical_Safety_At_Home.pdf ( 129.5k ) Number of downloads: 840


Why nuisance trip, what happen and some solution without compromise the safety.

 Solution.pdf ( 171.31k ) Number of downloads: 1641


This post has been edited by ozak: Dec 1 2012, 05:58 PM

can we buy and fix the RCCD ourself to replace my told ELCB ? 15 years no touch/change it..

or its better to recommend an "ëlectrician" to fix it ?

Can it trip? Press the test button to try it.

You can change it yourself. Not difficult. Just makesure OFF the main MCB or takeout the fuse. 2 wire in and 2 wire out. Some maybe have direction of incoming and outgoing. Some don't.

If no confident, buy the RCCB and ask the bos change it for you. Pay some fee.

My parent house happen too only when got lighting. Without lighting everything o.k. The house only 7 years. Any solution for me?

Asking Hager 30mA RCCB around 5 shops in Puchong and Serdang, none of them carry 30mA, so just get the 100mA for RM80

I'm planing to install 30mA sensitivity RCBO to replace the MCB for the electric shower heater, is it better than install 30mA at the main switch?

Beside hager, you can get the ABB anti nuisance trip 30mA RCCB. Read the pdf file above.

RCBO is a good idea too. It have extra protection than RCCB. It use after the main RCCB.

I m using RCD+fuse 30mA for heater, kitchen and fountain. Install inside toilet nearer to heater.

has anybody used AOELEC Auto Reclosing (Resetting) RCCB before ?

How is the effectiveness ?

I understand it can auto rest 3 times and after the third time it has to be manually reset (for safety reason).
Can the resetting time be adjustable, ie to auto set after say 30 minutes it has tripped?

How much is the cost per unit ?

Thanks in advance.

dennis

Please don't be silly to disconnect it as it's for your own protection. Many times that my RCCB has tripped, it's due to some malfunction in my house electrical equipment. Sometimes there's a residual leak in your house that's tripping your ELCB/RCCB.

disconnecting an ELCB that cant by definition do what it should do because the threshold is too high is not silly. if the ELCB will only act AFTER its too late because its rating is too high what's the use? i can also place another spare on on top of my meter for the looks of it and it would have almost the same effect.

Its normal for RCCB to trip during lightning strike, its nothing to do with rccb sensitivity, rccb trip due to current imbalance between live n neutral, to avoid rccb from tripping during lightning strike, use S-Type RCCB/anti nuisance rccb.

U can get at any hardware electrical shop...

its nothing to do with good earth, but rccb must be connected to the earth in order for rccb to trip. RCBB installation is compulsory according to Malaysia regulation and some of british colonial country, most of the low voltage system adapted TT system. 30mA sensitivity is used for handheld equipment such as socket outlet, according to malaysia law, all scoket outlet must be connected to 30mA. For the main RCCB must use max 100mA sensitivity.

The question is , does 100mA can save the human live?, the answer is yes...please refer to iec 60479 for more details. Please note that rccb main function is to protect human being/livestock from indirect electrical shock, not from direct electrical shock.

Rccb/elcb must be tested at least once for every 2 years. If ELCB/RCCB is voltage operated, its compulsory to change to current operated. All the electrical installation must be installed by competent person according to malaysia law.

use RCCB + Autoreset. U also can use S type RCCB, but im not sure about the regulation because they didnt stated either G type or S type.

RCBO normally is used for final circuit, not intended to be used for main circuit,

According to Malaysia regulation, for shower heater u must use 10mA sensitivity, but most of shower heater nowadays equipped with 10mA rccb.

Its not advisable to use 30mA for main circuit, it may cause nuisance tripping, u have to consider the leakage from the inductance load such as freeze, lighting,computer,air cond...for the equipment with energy saver, most of it contribute to high leakage current such as inverter aircond, computer & etc.

Auto reset usually is used for industrial application, not for domestic application, but it doesnt matter since its not stated in the law.

Most of autoreset will fall under permanent trips after 3 times tripping in certain period, but its not for safety reason, its to differentiate whether it is nuisance tripping or permanent tripping.

30 minutes is too long, standard practice is 1 min for Malaysia because the lightning strike is frequent, most for the europe country is 3 sec.

For the ABB the cost is around RM800, but not reliable....

i would recommend mikimoto brand, but the price is twice than abb and more reliable.

Please be remind that rccb main function is to protect from indirect contact, not for direct contact, even 300mA sensitivity still can protect from electrical shock.Please read iec 60479 for more details, its depend on the time to disconnect from the current and the magnitude of leakage current. Yes 10mA and 30mA can protect from direct electrical shock, but its not practical to use for the main circuit...

ok, scenario..There's a short/earth leakage in the kettle. ELCB/RCCB detects it and turns off power. If the ELCB didn't work, you could have touched the kettle and electrocuted yourself.

scenario 2.. You touch a live wire and current starts flowing through you. Since it's electricity, your muscles seize and you can't let go. RCCB detects it and cuts off the power. 10mA flows through you compared to 10000mA.

The amount of of mA that it takes to kill you is very subjective. It depends on the path to ground. Whether it goes thru your heart or not etc.

This post has been edited by jovial: Mar 28 2013, 07:50 AM

hi, I am facing rccb tripping during lightning.. currently using TBC 63A 100mA rccb..

I would like to try the Hager Anti Nuisance rccb.. may I know which model have the "Anti Nuisance" feature? or any Hager rccb are equipped with this feature?

Thank you..

It is a RCD. Brand MK. Don't think can get it here and not selling anymore. Order it from UK 13yrs ago.

I am searching to increase the sensitivity of my RCCD to induce more frequent tripping and saw this forum...totally opposite of what i m looking for but here is my comment...Increasing RCCD beyond 100mA is dangerous, please avoid doing so, RCCD is installed to save lifes.
If it is due to lightning, a good surge protection device (SPD/TVSS) will be able to solve the problem, increase in surge will be absorb by the device, look for 1 with 10 modes protection if tripping is too frequent, otherwise 7 modes protection device is sufficient for a house and choose 1 with the longest warranty (rules of thumb..length of warranty=quality), my problem was sorted out...using an american brand, Sine Tamer.