NoDisplayName Posted September 10, 2023 Share Posted September 10, 2023 I've got 10 MCB's in the house unit, selection of Schneider, Square D and Chang, with a 2P 63A Schneider main breaker. Would like to replace the main breaker with a 2P 63A RCBO unit. Chang and Schneider appear to be interchangeable. Chang is available locally, Schneider is a bit of a drive. Not sure if I want to order online. No desire to switch out the 10 MCB's. Can live with one RCBO to rule them all. Any reasons NOT to go with the Chang instead of Schneider? Link to comment Share on other sites More sharing options...
CDG931 Posted September 10, 2023 Share Posted September 10, 2023 ABB is better Link to comment Share on other sites More sharing options...
NoDisplayName Posted September 10, 2023 Author Share Posted September 10, 2023 24 minutes ago, CDG931 said: ABB is better I'll look into ABB, but for now the choice is between Chang and Schneider. 1 Link to comment Share on other sites More sharing options...
Crossy Posted September 10, 2023 Share Posted September 10, 2023 36 minutes ago, CDG931 said: ABB is better Do ABB do a compatible "plug-in" unit? @NoDisplayName I'd go with the Schneider unit for a main switch. 2 Link to comment Share on other sites More sharing options...
TimeMachine Posted September 10, 2023 Share Posted September 10, 2023 59 minutes ago, NoDisplayName said: Can live with one RCBO to rule them all. In oz the regulation is one rcbo for max 3 MCB. Not sure why though ? Link to comment Share on other sites More sharing options...
Crossy Posted September 10, 2023 Share Posted September 10, 2023 5 minutes ago, TimeMachine said: In oz the regulation is one rcbo for max 3 MCB. Not sure why though ? The idea is that you never lose all power, specifically lighting. The UK like the board split over two RCDs. It's all about safety in the event of a trip. 1 Link to comment Share on other sites More sharing options...
NoDisplayName Posted September 10, 2023 Author Share Posted September 10, 2023 14 minutes ago, TimeMachine said: In oz the regulation is one rcbo for max 3 MCB. Not sure why though ? I read somewhere that the latest Thai reg is for main breaker RCBO. Not worried if I lose all power. If it trips at night, I have flashlights. I can switch off all the MCD's and go from there. Link to comment Share on other sites More sharing options...
TimeMachine Posted September 10, 2023 Share Posted September 10, 2023 12 minutes ago, Crossy said: The idea is that you never lose all power, specifically lighting. The UK like the board split over two RCDs. It's all about safety in the event of a trip. Yeah. I have all rcbo for every cct.best practice 1 Link to comment Share on other sites More sharing options...
Crossy Posted September 10, 2023 Share Posted September 10, 2023 19 minutes ago, NoDisplayName said: I read somewhere that the latest Thai reg is for main breaker RCBO. Yeah, that's a minimum requirement. no problem with an RCBO per circuit. Link to comment Share on other sites More sharing options...
TimeMachine Posted September 10, 2023 Share Posted September 10, 2023 You just lucky not doing things in oz. Authorities are fascists there. Landlords need to spend hundreds of dollars each year for safety checks every two years. Poor renters have just had to endure major increases. Friend said 50 bucks more a week for his rent just recently. Anyway, with the cost of breakers being so cheap consider rewiring in all rcbo. It will save you in the future from trying to hunt down any earth leakage. If a tiny place no big deal. 1 Link to comment Share on other sites More sharing options...
carlyai Posted September 10, 2023 Share Posted September 10, 2023 17 hours ago, NoDisplayName said: I read somewhere that the latest Thai reg is for main breaker RCBO. Not worried if I lose all power. If it trips at night, I have flashlights. I can switch off all the MCD's and go from there. Trouble is that if it is the main house breaker it could trip on a close lightning strike or an incoming power flick (on, then a short duration off, then on again), or genset start up. Mine sometimes trips on any of these. And the chances are that it will trip just as you go out the gate for a couple of days holiday and you come back to a defrosted fridge. 1 Link to comment Share on other sites More sharing options...
bluejets Posted September 11, 2023 Share Posted September 11, 2023 On 9/10/2023 at 3:54 PM, TimeMachine said: In oz the regulation is one rcbo for max 3 MCB. Not sure why though ? Reason is, if wired as the Op suggests, (bad idea) any trip limits power outage to just those circuits. Many (most if not all new installs/or modifications) these days are separate RCBO on each and every circuit. They're cheap enough......... As for the different brands....you get what you pay for.???? 1 Link to comment Share on other sites More sharing options...
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