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Ah, but to do that you would have to mix and match. ?Single width with plug in busbars for L & N sounds like a good way forward...
Discuss Global IR testing on RCBO populated CU in the UK Electrical Forum area at ElectriciansForums.net
Ah, but to do that you would have to mix and match. ?Single width with plug in busbars for L & N sounds like a good way forward...
Aaaaagjhghjkh!!!!! No........Ah, but to do that you would have to mix and match. ?
Ah, but to do that you would have to mix and match. ?
For our current project we initially assumed a 60-100A single phase supply as all our equipment is single phase, and we assumed we would have a lot more to pay for getting 3-phase in. Then we actually got to see the supply arrangement and to speak to the sparky who normally deals with it and found we could get 500A 3-phase if we needed it all for the same price!I did once enquire about a 3 phase supply for a workshop at the same property, but the costs were astronomical - new poles, transformer, underground cables etc ?
The Pro-Elec (CPC's own brand) RCBOs I used in our rental properties test out at (from memory) 165k one way, but open the other way - L+N to functional earth fly lead. Can't do a whole installation test with my MFT as it doesn't run the test long enough to charge up capacitors - but the trusty old Megger BM10 works a treat holding the button down for a few seconds.Look out for RCBO with functional earths as they show up when doing global or L+N to E testing. The Hager commercial RCBO have them but I don't know about the domestic ones.
There are single module compact RCBOs available - some of them without flying neutral leads. I can understand why somsone might have reasons not to use SBS - but at least they do have single module RCBOs with switched neutrals and N busbar.The only problem with switched neutral RCBO's is they are dual module, not a problem in a continental type CU but very restrictive in a normal UK domestic board, I had to use single module RCBO's for the lighting circuits due to lack of room.
Convenience - and getting one result.Why not test N-earth and then test live - earth. What are you gaining/preventing by joining them together?
The southern Wiring Rules are a sort of strange mix of German and British Standards. I think much of the reason for this is that the ESB (Electricity Supply Board - the DSO) had historic ties with Siemens if I'm not mistaken in their early days. So Diazed and later Neozed fuses were the usual fuse standard here rather than BS 88s or BS 1361s as an example, and multi-row DBs are used in domestic premises.In the case of ROI I would not be surprised if it was a mix of the single-pole OCPD based on the historic ties with the UK regs, and the move to double-pole switching from more recent EU influence and/or historical use of TT or similar, leading the 1P+N being normal for RCBO.
Might explain the difference in part number for the same basic module size between the Hager .ie and .fr sites.
Maybe @Risteard knows more on the background?
Yes, Germany had a huge influence on our electrical system. After the war a decision was taken here to electrify the entire country regardless of how remote a dwelling was located.A massive project, It was completed in the 1970,s. More by accident than design, an Irish engineer working for ESB but who previously worked for Siemens got them involved in the project. Germany was undergoing its own regeneration at the time, so the relationship worked well.The southern Wiring Rules are a sort of strange mix of German and British Standards. I think much of the reason for this is that the ESB (Electricity Supply Board - the DSO) had historic ties with Siemens if I'm not mistaken in their early days. So Diazed and later Neozed fuses were the usual fuse standard here rather than BS 88s or BS 1361s as an example, and multi-row DBs are used in domestic premises.
What about the incoming protection for the installation?Ironically you mention fuses (neozed etc). Well, in five years time, only place you will see a fuse in this country is likely to be a museum
A 63 amp mcb for a standard 12kva supply. As of February this year, new regs stipulate that now becomes a double pole 63ampWhat about the incoming protection for the installation?
That is interesting. Certainly makes it easier to disconnect the CU supply to do any work!A 63 amp mcb for a standard 12kva supply. As of February this year, new regs stipulate that now becomes a double pole 63amp
Ironically you mention fuses (neozed etc). Well, in five years time, only place you will see a fuse in this country is likely to be a museum
Of Course, but I do believe that the majority of rural ROI properties are still TT, but I have no facts to back that up except for the lodge I stay at in Enniskillen.I think ROI is mostly TN-C-S now so no need for an incoming RCD. In any case there has to be some form of over-current protection so it would need to be an RCBO here.
Of Course, but I do believe that the majority of rural ROI properties are still TT, but I have no facts to back that up except for the lodge I stay at in Enniskillen.
Yes.The difference between it and the other mcb, s is that it may be a "C" instead of a"B" type if the supply characterises allow. You raise an interesting question in my mind though as to why it can be a regular MCB instead of an MCCB and offhand I suspect it may have to do with the DSO, s protective fuse in the meter cabinet. Must look into that.That is interesting. Certainly makes it easier to disconnect the CU supply to do any work!
It is just a regular MCB (not MCCB)?
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