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Replacing Safe-T-Cut with individual RCBO Breakers


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We have in our old House one of these

 

SpV3-A.jpg.6d52fa7af85fb74951cb1fec8a41bd38.jpg

 

And the individual breakers are the "normal" kind.

 

Can we replace the breakers with these (see link) and then set the Safe-T-Cut to DIRECT?

 

https://www.lazada.co.th/products/schneider-rcbo-1p-10a-40a-circuit-breaker-i962890702-s2049980012.html?

 

We have the Schneider Box (so the plug-on type should work)

 

Can send pictures tomorrow!

 

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Yup, no problem going to individual RCBOs on those "risky" circuits.

 

The hardest bit in an older house will be ensuring the relevant neutrals go to the correct RCBO, get it wrong and it won't stay "on".

 

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Thx DC.

 

That is a problem for the Sparky!.

 

We have a couple of those left from our new build and those will let the Sparky try to replace a couple and see how that goes.!

 

Will post some pictures of the whole setup tmrw!

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1 hour ago, MJCM said:

Thx DC.

 

That is a problem for the Sparky!.

 

We have a couple of those left from our new build and those will let the Sparky try to replace a couple and see how that goes.!

 

Will post some pictures of the whole setup tmrw!

Just a word of warning, we had a “Thai sparky” do most of the wiring.
 

They were totally incompetent when it came to tracing and eliminating a borrowed neutral. We had to (and did) find a real qualified electrician to come in and put the circuits into the correct configuration. It was something north of 20,000 

 

So don’t believe that your sparky actually understands and can sort out the situation if it happens, until proved that he really can.

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Posted (edited)

Unless there is a specific reason (like some circuits not on RCBO) I would let sleeping dogs lie.  That one RCBO should provide good protection if tested occasionally and set at 30ma or below.  You start placing individual breakers and nobody is going to know how to fix, much less install.  In western countries they are the standard - here one RCBO is the standard and with missing earths - very much needed. 

Edited by lopburi3
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Posted (edited)
24 minutes ago, sometimewoodworker said:

 

So don’t believe that your sparky actually understands and can sort out the situation if it happens, until proved that he really can.

Thx, but our Sparky fortunately knows what he is doing he wired our whole new house all with individual RCBO breakers and was totally approved by the PEA after their inspection. And never an issue in almost 2 years now.

 

The only problem with him is that he likes the Lao Khao too much :whistling:

Edited by MJCM
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Posted (edited)
13 minutes ago, lopburi3 said:

Unless there is a specific reason (like some circuits not on RCBO) I would let sleeping dogs lie. 

There is 1 good reason, once in a long while the Safe-T-Cut trips, and thus with the current setup the Whole house is in Darkness because the Safe-T-Cut cuts the power, with the individual RCBO's we know which one the problem lies with!

 

And then we tackle that problem!

 

Edit: Plus we have some spare ones from our current build so we don't have to buy new ones! If it doesn't work, we just put back the old ones 😉

 

Edited by MJCM
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4 minutes ago, MJCM said:

There is 1 good reason, once in a long while the Safe-T-Cut trips, and thus with the current setup the Whole house is in Darkness because the Safe-T-Cut cuts the power, with the individual RCBO's we know which one the problem lies with!

 

And then we tackle that problem!

 

 

Indeed makes trouble shooting easier but not sure that for most a change of operating system is justified - especially as most workers are not going to have a clue.  As for light have flashlights within reach as power fails much more often than have RCBO trip.  I am still using an original Safe-t-cut from 1978 but have several sub panels with own RCBO these days.  

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Posted (edited)
12 minutes ago, lopburi3 said:

Indeed makes trouble shooting easier but not sure that for most a change of operating system is justified - especially as most workers are not going to have a clue.

Fortunately our Sparky knows what he is doing.

 

12 minutes ago, lopburi3 said:

As for light have flashlights within reach as power fails much more often than have RCBO trip.

Let me tell you this, we live 20 kms from our old House, at 11pm one day we got a call, my wife's 68 year old uncle was on the phone (he was visiting and staying in our old house).

 

He - "No lights in House"

We - "Power Outage??"

He - "No, neighbor has light"

We (read I)  - "Ooh ... Safe-t-cut

We (for the next 25 min) - tried to explain how reset the Safe-T-Cut

We (After those 25 mins) gave up and we jumped in the car drove the 20km's reset the Safe-T-Cut and then drove back!

 

Since then we wanting to change the Safe-T-Cut for the individual ones. At least then either the AIrcon/Lights/Water Pump/Water heater keeps working 😉

Edited by MJCM
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5 minutes ago, MJCM said:

Fortunately our Sparky knows what he is doing.

 

Let me tell you this, we live 20 kms from our old House, at 11pm one day we got a call, my wife's 68 year old uncle was on the phone (he was visiting and staying in our old house).

 

He - "No lights in House"

We - "Power Outage??"

He - "No, neighbor has light"

We (read I)  - "Ooh ... Safe-t-cut

We (for the next 25 min) - tried to explain how reset the Safe-T-Cut

We (After those 25 mins) gave up and we jumped in the car drove the 20km's reset the Safe-T-Cut and then drove back!

Indeed pull down push up seems to be a hard concept for many of us (we just want to push up).  😀

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Chips, I am mistaken, the box with the Breakers is NOT Schneider but it's ABB!!

 

Does this mean we also have to change the Box?

 

abb.jpg.599767250add7e91c1e784e85b6d0ffc.jpg

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There may be cheaper ones than the BtiCino ones, also note that the Bti ones have a "functional earth" lead, it's supposed to help discriminate when you have a N-E fault.

 

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Wow, that is very cheap. Tomzn stuff is generally very good, I wonder if it's real.

 

I think Tomzn have an official Lazada store, have a look there for the same item.

 

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