Good luck with it!
The norm for Irish supplies is TN-C-S "Neutralised" to use the local lingo. You don't need a 100mA breaker across the entire supply with that type of earthing system. That's only used on a TT setup.
Also, don't attempt to convert a TT supply to TN-C-S without getting the ESB involved. It's taken pretty seriously and you can cause a major public safety hazzard if the local distribution system is TT.
Only one connection between earth and neutral is allowed. This is done BEFORE the meter and is carried out by the ESB Networks engineer who will energise / reenergise the supply.
Basically, leave your meter tails, including the main earth in the meter cabinet (entering through the bottom) ESB will do the rest.
On a personal preference note:
I would highly recomend the use of RCDs on lighting circuits. Install them as appropriate to avoid total black-outs should they trip.
e.g. if you split the panel across 2 x 30mA RCDs so that only half the lights will ever go at one time. There are various options available.
My personal view is that one of the most likely ways to get shocked is via a light fitting when changing a bulb.
There are some slight differences in terms of lighting circuit layouts too. We generally use 10A radials rather than 6A.
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Again, just as a footnote... ring circuits are generally not used here although permitted. Most homes have a 2 or 3 row hager / siemens DIN rail panel with either neozed fuses or breakers.
Socket outlets : 20A radials
Water heater: 16 or 20A radial
Lighting : 10A radials
Cooker: >32A
Shower : as appropriate.
Others : as appropriate.
[This message has been edited by djk (edited 03-28-2006).]
