Crabtree Starbreakers are like that. Not sure why?
New build site RCD issues
- Thread starter ScottishGasMan
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See post #9. It seems that the left-hand RCD is a rather 'special' one ("Split Load", as it says), the likes of which I personally have never seen (or heard of).
Kind Regards, John
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Bugger. Missed that one
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What about where inserted into the bus bar chamber, never used them, but would assume from pictures there is a gap in bus bar which is breached by the RCD, so if inserted one hole to left then maybe it would connect two lines together which would result in imbalance?
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As I understand it .... if it were inserted 'one hole to the left', none of the 'protected' MCBs would be connected to it (the left-hand prong would be getting power from the main switch, and the right-hand prog would be connected to nothing (being in the 'gap' in the bar) - so none of those 'protected' circuits would work.
Kind Regards, John
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With left hand one yes, but with right hand one would it not result is two RCD's feeding same bus bar?
Correct,
or two to the left, or indeed anywhere to the rightit is not supposed to be.
As a matter of interest, why does anyone think it is called a split load RCCB?
I would think that it refers to being for use in a split load CU, but of course it doesn't have to be and that depends on the busbar.
Edit - incorrect - the other RCD is of course connected to the main switch.
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However, when you asked ...
... maybe you weren't intending to ask why anyone thinks it is called a split load RCCB (the answer being 'that's what is says on the tin') but, rather, were asking why Crabtree called it that. Is that the case?
Kind Regards, John
Edit: Ah, too slow - you've answered that question
Yes, it is the formation of the busbar that determines if the CU is split load, not the fact that it has one of those 'odd' RCCBs.
You tell me. As you've said it could be used however one wanted - it's really a way of allowing the L's of one (but only one) RCD within a CU to both be plugged in to busbars - but that could be done with a 'single RCD CU' (e.g. a 'garage' one) just as much as for one of those in a 'split-load' 2-RCD one.
Kind Regards, John
It's different from the other, because the N terminals are on your right as you look at it, and it's three units wide with offset terminals.
Other brands I've seen also swap left and right.
It would works just as well either way, but the labelling and colours (if any) would be incorrect and encourage errors.
On the Starbreaker, it may need a special arrangement of those "stabbers" for the busbar, which other brands don't have.
Here's one I did long, long ago (not a current one)
View media item 1092
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