Is this an RCB

[stubuzz]

Does the one in the picture protect overload or only leakage?

[Crossy]

Does the one in the picture protect overload or only leakage?

Yes, it's an RCBO so overload as well as leakage.

[stubuzz]

Could i use this as the main breaker. It does not specify overload

.

[Crossy]

Could i use this as the main breaker. It does not specify overload

Yes, it specifies "C32" which would be a C curve 32A breaker so it includes overload.

[stubuzz]

The one above is 475 bt from a Thai company. I may order it after i check out the other stuff on the site.

Thanks for the help and advice.

[stubuzz]

Just had a look at the Safe T Cut breakers ( see post 25) it looks like the neutral wire has to be grounded. Is that right?

[lopburi3]

Not on mine - but mine is 35 years old.

[bankruatsteve]

Not on mine - but mine is 35 years old.

Do you have to wind it up?

[lopburi3]

No and it still works fine - this is one area that Thailand was ahead of much of the world - now if they would only require ground wires.

[Crossy]

Just had a look at the Safe T Cut breakers ( see post 25) it looks like the neutral wire has to be grounded. Is that right?

PEA and MEA insist on MEN (grounded neutral) connection for new installations and won't connect a permanent supply if it's not implemented.

If it's an existing system my usual advice is DO NOT ground the neutral unless you KNOW that MEN is implemented in your area, the earth leakage portion of the Safe-T-Cut will work just fine without the N-E link.

If you see a ground spike connected to the neutral wire on every 3rd pole or so you have MEN so a N-E link will improve the overall safety of your installation.