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 RCCB for Water Heater

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JinXXX
post Oct 12 2023, 01:50 PM

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QUOTE(stormer.lyn @ Oct 5 2023, 08:37 AM)
Yes, this diagram looks good. What I meant about the water heater live wire is in the picture below.

user posted image

This is the physical connection of the wires. This way the Current to the WH doesn't go through the busbar, but goes wire-to-wire. If you look at a busbar, the bar is rated for 120A (example) but the tines are rated for the Current to an MCB only. They way wiremen stuff the incoming wire into the MCB and get it to distribute is dangerous in my opinion.

Sorry, a bit busy to get on LYN. In the marine line, many ships right now. But I'll try to get back to you asap if you have any further questions.
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your pic shouldn't the wire be 16mm coming out from the main switch ? ? rather than 10mm ?
or cause you have 40a/30ma rccd thats why you ok with 10mm ?
JinXXX
post Oct 12 2023, 05:39 PM

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my concern isnt the rccb or the xxmA , its more about the wire size /carrying amps and the sub switch lower amps
JinXXX
post Oct 12 2023, 09:07 PM

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QUOTE(Emily Ratajkowski @ Oct 12 2023, 02:50 PM)
Edit to add: Of course if you change all the 10mm² to 16mm², and the main RCCBs to 63A xxmA, you don't have to worry about any of the above. But you are now dealing with 16mm² wires within the DB, and that is a whole other issue
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how fat is a 16mm vs a 10mm actually , the diameter ? until well you not wanting to deal with 16mm wire?

ps how u do the mm square thinggy ?
JinXXX
post Oct 12 2023, 10:06 PM

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okie thanks for the sharing so the op, will be doing the electrical db sendiri or what ? since sharing the diagram pigue my interest is this gonna be a DIY or hire someone to do ?
JinXXX
post Oct 13 2023, 08:53 AM

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QUOTE(lowyat101 @ Oct 13 2023, 08:11 AM)
My understanding is, the 10mm2 cable is ok since TS is not expecting the current over this circuit to exceed this, but TS need to install a 40A MCB before the 40A RCCD. To me this is a must, else you are right that the cable should then be 16mm2.
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doesnt the 40A rccd also functions like a MCB ?
JinXXX
post Oct 13 2023, 11:12 AM

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https://chintglobal.com/blog/difference-bet...-rcd-rccb-rcbo/

QUOTE
Circuit breakers are essentially safety devices of any property that uses electricity. These fixtures act as the third party within sophisticated and dangerous electrical wiring systems. MCB, MCCB, RCD, RCCD, and RCBO are all circuit breakers. They are used in homes to protect against human hazards and appliance damage.

The appliances are designed to perform specific functions. It is their particular functionality that makes them different. However, the main difference is that MCB, RCDs, and RCCBs are used for low current, as low as 125 amps. However, MCCBs are used for high currents up to 1000 amps.


MCB
MCB stands for Miniature Circuit Breakers.

MCCB
On the other hand, MCCB is an abbreviation for Molded Case Circuit Breaker.

RCCB
RCCB stands for Residual Current Circuit Breaker. RCCB is also known as RCB or RCD. RCD stands for Residual Current Device, while RCB stands for Residual Current Breaker. RCCB is an electrical wiring device that disconnects the circuit as soon as it detects a current leak to the earth wire. It also protects against electric electrocution or shock caused by direct contact.

RCBO and RCCBs, are residual current protection devices. This protection is achieved by monitoring the current flow in the line and neutral. In a healthy circuit, the current flow via the line equals the return flow in the neutral.

However, this return flow may not be equal to the line’s current flow in the event of any abnormalities. A residual current device will sense such a scenario and interrupt the circuit.

RCBO
RCBO stands for Residual Current Breaker with Over-Current. The RCBO combines the functionality of an MCB and RCD/RCCB. When there is a current leakage, the RCBO trips the entire circuit. Consequently, internal magnetic/thermal circuit breaker components can trip the electronic device when the circuit is overloaded.

QUOTE
RCD Vs. RCBO: What is the Difference?
RCDs can protect against electric shocks, residual currents, and earth faults. On the other hand, RCBOs can do what RCDs can do and protect a circuit from short circuits and overload. RCBOs are essentially a combination of MCB and RCCB. As such, it can protect overload and short circuits.



so RCBO is better than RCCB, since RCBO can do both ?

This post has been edited by JinXXX: Oct 13 2023, 11:14 AM
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