Well that clearly shows the thermal/magnetic element (square & curve zig-zag bit) is only in the line path.This should be clearer:
Discuss Global IR testing on RCBO populated CU in the UK Electrical Forum area at ElectriciansForums.net
Well that clearly shows the thermal/magnetic element (square & curve zig-zag bit) is only in the line path.This should be clearer:
That shows the trip part as the 'X' crossing the live path just after the switch symbol.Crabtree single module
That shows the trip part as the 'X' crossing the live path just after the switch symbol.
I think it is often seen that a MCB/MCCB is shown just as an X on power schematics.
I think it is just one of conventions.What are the practical differences between the two schematics? I don't fully understand either, but this is a great alternative to painting the kitchen.
So RCCB really means "residual current, concealed -----"?No ----- on this image:
That is a fair point.Often the space is, nt available in older installations. In newer installs space is generally a non-issue. But I can assure from experience that once you install a CU with dual module rcbo, s you will find yourself seeking to "make the space" on your next install. I find installation time is nearly halved. Its a bit like comparing a WAGO push in to a traditional connector. They are also very convenient for testing and for faultfinding.Is a neutral busbar worth the additional space required for 2 module RCBOs?
That is a fair point.Often the space is, nt available in older installations. In newer installs space is generally a non-issue. But I can assure from experience that once you install a CU with dual module rcbo, s you will find yourself seeking to "make the space" on your next install. I find installation time is nearly halved. Its a bit like comparing a WAGO push in to a traditional connector. They are also very convenient for testing and for faultfinding.
Again a valid point. But nowadays (down here at least), CU, s tend to be located in utility areas rather than hallways. CU, s are also much more presentable than they used to be and with cover attached fade into the background. And realistically, how much extra space are we talking about? The new GE CU is basically an enlarged 2 row CU. They added 2" to the the width and approx 4" to the length. More than adequate for a complete rcbo CU in a 3 bedroom house here. And that's allowing for the fact we use more circuits per domestic dwelling than the UK.I don't doubt the benefits, but was thinking more from a customer perspective in domestic settings and exterior space used as opposed to interior space available.
Again a valid point. But nowadays (down here at least), CU, s tend to be located in utility areas rather than hallways. CU, s are also much more presentable than they used to be and with cover attached fade into the background. And realistically, how much extra space are we talking about? The new GE CU is basically an enlarged 2 row CU. They added 2" to the the width and approx 4" to the length. More than adequate for a complete rcbo CU in a 3 bedroom house here. And that's allowing for the fact we use more circuits per domestic dwelling than the UK.
From an electrical safety point of view, I would have no concerns vi's, a vi's single module or double module rcbo, s. From an installation and maintenance (faultfinding) and testing point of view, (IR testing and neutral earth fault finding) I would suggest that dual module are a standout winner.Answers in simple terms please as you're not conversing with an expert.
I think (not sure) that the original question being asked by @nicebutdim was more about single versus double width for the 1P+N style like the new Wylex, Crabtree, Fusebox RCBOs.From an electrical safety point of view, I would have no concerns vi's, a vi's single module or double module rcbo, s. From an installation and maintenance (faultfinding) and testing point of view, (IR testing and neutral earth fault finding) I would suggest that dual module are a standout winner.
It is not that uncommon to have 3-phase to domestic for higher power, but fairly unusual to have multiple phases around a house. Usually it is one phase for home, another for EV, etc., or the home is so large it has sub-DB per floor or wing, etc, and single-phase within there.Regarding a 3 phase supply in domestic dwellings, your question is entirely sensible. We don't have it in ROI or UK "because...". You will hear plenty of reasons why its not a good ideabut no valid ones in my opinion. Lots of European countries have them and I see nothing but advantages.
I think (not sure) that the original question being asked by @nicebutdim was more about single versus double width for the 1P+N style like the new Wylex, Crabtree, Fusebox RCBOs.
To me having neutral switch just make so much sense, for testing as you say, as well as for TT with any up-front delay RCD to provide selectivity on N-E faults.
I also agree that we should already have neutral as a bus-bar so you don't have the nest of RCBO tails to deal with.
That was certainly my assumption as well, but was educated on here about two years or so ago, I think by you PC1966 when you said that the N was just dragged along with the L when the thermal/magnetic trips operated, you have to wonder why they did that when there is obviously room inside for two trips, perhaps it's just cost?My original assumption was the double-width was for 2P OCPD action, so it needed 2 sets of thermal/magnetic trips and related arc-chutes, etc.
My original assumption was the double-width was for 2P OCPD action, so it needed 2 sets of thermal/magnetic trips and related arc-chutes, etc.
But given the Hager ones seem to 1P+N and presumably others for the EU are also that, I do wonder. Maybe just historically that was the space needed for the RCD electronics, etc?
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