Hungarian wiring codes

[happyhippy68]

Hi does anybody out there have an English version of the Hungarian wiring regulations. I am in the process of buying a house there and wish to upgrade the supply and earthing, followed by a full rewire and I want to make sure the contractors are doing it to the correct local codes.

 

[not clever]

I wouldn't worry, they come here and ignore our regs so why would they be any different when on home turf.

 

[Engineer54]

Hi does anybody out there have an English version of the Hungarian wiring regulations. I am in the process of buying a house there and wish to upgrade the supply and earthing, followed by a full rewire and I want to make sure the contractors are doing it to the correct local codes.

I doubt very much if there is such a publication available!! System earthing is probably going to be TT, so advisable to install the rods yourself, and go deep!! ...lol!!

 

[Silly Sausage]

Why don't you do it yourself to our regs, you'll be confident it's done properly then(?)

 

[Engineer54]

Why don't you do it yourself to our regs, you'll be confident it's done properly then(?)

So long as he doesn't use Ring circuits for power outlets, or use our T&E cables, he may get away with it!! lol!! Then again it maybe a plastic conduit containment system that he has, and from my experience if it is conduit, it'll be mostly 16mm....

 

[happyhippy68]

Why don't you do it yourself to our regs, you'll be confident it's done properly then(?)

Hi Guys,

I will probably do it all myself right back to a 3 phase distribution board feeding sub main boards. The problem is that to get a decent supply size you have to step up to a 3 phase supply. (I am informed locally!) This requires that you have your installation inspected prior to connection by an approved inspector. As I don,t know the regs and the locals smell blood and/or cash any time a foreign buyer looks at a property redevelopment I am being a little cautious about letting on I am in "the trade" so to speak. I was hoping to find a decent contractor to then manage the project locally through them. Its been hard going even with a partner/boss/she who must be obeyed that speaks the local lingo. (She just can't translate technical manuals for me unfortunately)

 

[Engineer54]

I will probably do it all myself right back to a 3 phase distribution board feeding sub main boards.

​

How big is this house, to have sub-main boards??

 

[happyhippy68]

How big is this house, to have sub-main boards??

Hi sorry for delay in reply I was out of the country. It has two garden houses/summer houses, 3 workshops and a triple garage, 2 wine cellars and a storeroom, total floor space 695 sq m. The Zs at a 16amp socket in the furthest workshop from the supply was 1039 ohms on a wet autumn day, I figure the TT earth is very poor and that will double during a hot dry spell. At present this is all protected by simple single board and a Main RCD rated 63Amp. The load I intend across the whole property will be in the region of 100 amps and locally I am told this will require converting to a 63amp 3 phase and having an inspection prior to connection.

 

[Engineer54]

If i were you, i'd TT at each building and then link them together, making sure there is at least 1 1/2 times the buried rod depth/length distance between any two rod positions. Use at least 2 X 5/8'' extendable rods at each position, unless you can purchase 8 foot 5/8'' rods over there!!


Do this and you should have a very stable and a pretty acceptable final Ra value, that will only improve over the next 2 to 4 years as the soil consolidates around the driven rods...

 

[happyhippy68]

Thanks Eng 54 that's my take on it as well. Possibly I may go for an excavated grid and link them as TT dependent on their reg requirements. I was planning to follow CENLEC guidance and hope for the best. As for containment I prefer metal galvanised 20/25mm Fed to conduit boxes. I Will radial all circuits as single rooms on a 6/10/20 amp breaker/RCBO via tri rated singles dependent on load and risk. As it is a full strip and rip I can set the conduit and points all in one go and then let the insulation and plaster boarders finish to that

 

[Engineer54]

Thanks Eng 54 that's my take on it as well. Possibly I may go for an excavated grid and link them as TT dependent on their reg requirements. I was planning to follow CENLEC guidance and hope for the best. As for containment I prefer metal galvanised 20/25mm Fed to conduit boxes. I Will radial all circuits as single rooms on a 6/10/20 amp breaker/RCBO via tri rated singles dependent on load and risk. As it is a full strip and rip I can set the conduit and points all in one go and then let the insulation and plaster boarders finish to that

All the better then!!

Excavated grids can be an expensive exercise, and will need to go down over a metre, to counteract any seasonal freezing/drying out, leaving stability a bit of a hit or miss affair. You'll be better off all round with the cheaper driven rod system. That is of course if you property isn't built on rock!! lol!!

If you do need to go with an excavated grid system, line the trenches with a conductive enhancer, (such as ''Bentonite'' which retains moisture for long periods of time, or better still ''Marconite'', which is a conductive mortar) and lay your conductors in it, while still in it's wet condition...