my rccd VL brande 100mA 63A provided by my developer keeps tripping especially lightning times.

i did a check on the life terminal to fuse switch 63A. I notice the incoming from TNB. the terminal is lose. u can slide up and down the life wire with slight force. when i dismantle the fuse switch. i saw inside connector clamp all purple. i presume this was bad installation from developer.

will this be the reason it cause the rccb to trip. if i tighten the wire connection will the prob solve.

thanks and appreciate the advice.

i check the tnb copper wire slightly darker. there are no arching marks on the wire and terminal of fuse switch. just the connectors on fuse switch turns purple. i sand paper life the tnb wire with protective glove to prevent electric shock. i already retighten the connection. i am currently monitor the situation.

under normal operating condition all appliances and lighting works perfectly fine for years. the tripping on rccb is only during lightnings. so long none of mcb trips at all.

anyone had observation this prob in nature cause rccb trips?

This post has been edited by toh2020: Dec 25 2013, 07:57 AM

You are playing with high voltage live wires. This is the job for TNB, not even the developer. Wearing protective gloves is not enough, you should also wear rubber boots and a plastic or wooden stool/ladder on dry floor.

Loose cable can cause rccb to trip I had similar experience but I called TNB and they fixed it for free.

rubber shoes on top of wooden chair with rubber cushion on dry floor. forgot to mention that.

my house at USJ 11 area.
always tripped when got thunderstorm.
i am using Hager ELCB 0.1mA.
Any idea if somethg that can reset back?
I am worry bout long holiday because i need electricity for my cctv and fridge.

what is the model of your ELCB? I presume should be RCCB for newer houses.

Sometimes by changing to a new RCCD will solve the problem even with same brand and made. Even thunderstorm is far away it can affect the RCD to trip. if that is the case get it changed.

There are other causes like loose connection that increase and decrease the resistance and sometimes due to live or neutral wires touching some metal that linked the house like the plaster ceiling metal trusses that are usually connected to earth via the downlight reflector holder. Even if you call an electrician to check it will hell of a puzzle. But never change to higher rating even if being advised to lessen the sensitivity.

even big pure electrical shop nearby my area hardly can hardly get any 100mA rccb. due to demand and supply from the neighbourhood 300mA are selling like hot cakes. they said change your original from 100mA to 300mA solve your problems. most of my neighbours did that and they had no tripping problem especially lightnings.

No trip no protection, Already with 100ma you could be half dead. then don't use at all if tripping is the real problem, afterall it serves no real protection. There are many 30ma around not only 0.1ma except that it is more expensive. I am not being sarcastic, just that you mislead other people and it is an advice you ought to take.

we all in the neighbourhood are told by dealer and local electrician that 300mA safer.

for my case i m monitoring current 100mA rccb and fuse switch after tightening. i update if there are updates.

You are mis inform. 300mA is not safer. You get short and the rccb is not easily trip. That's not call safer.

Lightning happen and the rccb not easily trip. That is call better.

100mA is more easily trip because it is more sensitive to detect minor fault. Which of course have problem with big bow of lightning. The easy and less cost way is just change it to 300mA. It still will trip but lesser.

look like mass are misinformed. this make sense why those local electric shops had so much abundant stock of 300mA rccbs. the misinformed public in large perceive the solution was best way out. just like monkey see monkey do.

meaning the lesser the mA the better protection.

well I had my fuse switch replaced. as mention before due to loose contact with TNB L wire. the inner components are toasted but it had been working all while for years. here are the pictures. the connectors are all dark purple.

The meaning of the number like 100mA or 300mA is how much the current detect will trip the rccb. Lower figure is safer.

The purple color is the constant hot temperature at the contact surface surrounding side. After long period of hot temperature, the material will change color. That show ..
1) A high current is flowing without sufficient surface contact between. Create a bottle neck at that place. This cost resistance and hot temperature occur.
2) Loose connection cost the electron hard to flow over within 2 contact. Occasionally some spark will happen. Resistance and hot temperature occur.

If you can, change that fuse holder to mcb type. Outside your house beside the meter is already have the fuse protect. (black square box) You don't need another fuse in the DB box. That is for the developer cut cost. MCB have better switch surface contact.

Just my bullshit CSI. He....

63A MCB? i had given thoughts about it. however my TNB L wire comes from bottom. Hence just nice to insert into INCOMING ONLY on the fuis switch from bottom up. while for MCB the L wire is not sufficient long to go on top of the incoming terminal. cause the wiring configuration is top down. which is reason i practically notice L wire shorter than N. cause the TNB N wire by defaults go to incoming N of RCCB from top which more longer.

Just put the MCB upside down. The look is same. Just the switch handle opposite.

good suggestion..

since I already installed replaced the new fuse switch. might as well monitor till next thunderstorm.

I do believe there is loss of energy due to heat built up on old fuse switch. which causes in-balance in 2 way current all while. which why during lightings the tolerance no longer there.

btw any comment which is best rccb to date with anti-nuisance tripping. currently using this rccb. anyone had any comments or experiences on this VL rccb product provided by developer.

i also got tripping during lightning even far away

using ABB RCCB 100mA

This post has been edited by ycs: Dec 27 2013, 02:56 PM

I hv two. One 100ma for whole house, one 30ma for my koi pond. No tripping problem

any particular reason in isolating the pond circuit?

i also happen to have a koi pond in the garden. could that be causing the tripping?