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I'll take a new photo tomorrow.It should also say the trip current (30mA, 100mA, 300mA typically). That photo is not detailed enough to see that.
Thank you for your help
Discuss three phase board separation in the Commercial Electrical Advice area at ElectriciansForums.net
I'll take a new photo tomorrow.It should also say the trip current (30mA, 100mA, 300mA typically). That photo is not detailed enough to see that.
It should also say the trip current (30mA, 100mA, 300mA typically). That photo is not detailed enough to see that.
OK, that sort of confirms it.It's 30mA, if you zoom in a bit you can see it.
Thank you very much for your answers. That helps a lot to understand which is the best option. And if anyone else has any other options i would like to hear them please.OK, that sort of confirms it.
The best suggestion is from @westward10 and as it looks like a Hager board you can probably get RCBO for the single phase circuits easily enough. However, I'm not sure you will find a RCBO to replace the 3-pole MCB in that board (and no space for another pole beside it) so your best/cheapest option might be:
Maybe others will have better ideas?
- Replace the RCD incomer with a switch (4P matches, but 3P might be fine).
- Replace the single pole MCBs with RCBOs for all circuits needing that protection (sockets, lights, etc)
- Put the RCD incomer from (1) in to a "garage CU" enclosure to provide separate protection for the 3-phase supply to the sauna.
It might be worth inquiring of the sauna company what sort of RCD protection the recommend, as 30mA might be less than normal for that sot of load (assuming cable route does not require it).
So I have to replace all mcb's to rcbo's and replace rcd to this switch? What about the 3P mcb?This is what you need to replace the rcd switch.
JK11004S - Hager 100A 4 Pole Mains Switch Incomer Kit, JK11004S Four Pole Switch Disconnector / JK1 Isolator Kit
Buy this Hager Hager 100A 4 Pole Mains Switch Incomer Kit, JK11004S Four Pole Switch Disconnector / JK1 Isolator Kit JK11004S online from Sparks Direct at our low price of £53.87. Archway, London UK.www.sparksdirect.co.uk
That is a good price. I was going to say you can probably buy just the switch on its own, but depending on your local trade outlet stock/staff levels, that might be the best option.This is what you need to replace the rcd switch.
Maybe others will have better ideas?
Yes, a couple of things to find out, such as did it always do this? (i.e. is a 30mA trip too low for that sort of installation) or has something changed.Yeah, my idea would be to find the fault that causes it to trip when water is poured on the stones in the sauna. This sounds like a definite link has been made between this action and the tripping of the RCD, so it needs to be investigated.
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