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I know the discussion has moved on a little from the original point....but if anyone is interested the distributor has informed me that it is supposed to be a TT system (which didn't have a earth electrode). However they have now offered to convert it to a TNC-S system. They have confirmed...

Thanks a lot for the replies. I'll be contacted the distributor and find out what the earthing system "should" be and then take it from there. cheers

I know this is a DIY site and so this might be a little beyond what should be posted on here, however i'd really like some opinions on this! Went to look at a system today, earthing arrangement appeared to be TN-S however the earth connection wasn't sweated onto the cable but connected via a...

Sorry for any confusion, i'm not actually in the BVI's!!! Just went there on a wonderful holiday a couple of months ago and put the location to it for a laugh...sorry if it caused confusion

I was just a little puzzled by it. I going to replace it anyway, i didn't get a chance to test it but as i hadn't seen one before i figured i'd ask on here. Thanks for the reply

I just came back ;-)

Does anyone know anything about the old ELCB (or is it ELCD??) units, they were the fore runners to RCD's i believe. I'm about to replace a consumer unit which is running on a TT earthing system (which at present doesn't have any earth!) and i wondered if i could use the existing ELCB in...

Thats great, thanks a lot guys

Can any kind soul tell me the SCC for a BS88 250 Fuse? Thanks in advance

Thanks for the reply It's what i thought but i was way off with the short circuit capacity! :) Thanks again

Am i right in thinking that the standard 100A fuse for a distributors cut out is a BS 1361? Don't suppose they have a standard short circuit capacity do they? or is it 23k A?

this house is officially having no more sockets or downlighters!

I've managed to come up with the figure of 99.24 A ;-) Mainly by classing the Shower circuit as "Power and heating" rather than "instant water heater". Thanks a lot for the advice, sometimes it just really helps to get another opinion.

Yeah totally i agree, the problem i'm having is wondering what figure i'm supposed to the record. The guidelines specifically state not to simply write the rating of the main circuit breaker as the maximum demand. Thanks for replying

In my attempt to ask a billion questions on this board!!!... Here's the next corker thats puzzling me. I'm attempting to work out maximum demand in my house using OSG guidelines My lighting circuits draw a maximum of 975W so 66% of that gives 3.3A Fixed alarm circuit drawing a maximum...

you are a legend!!! thank you

Could some kind sould please help me out of a minor drama.... whats the csa of the cpc of 6mm2 twin and earth cable? hope someone can help, i know its a dull question!!! Thanks

Thank you!!!! Really thanks to both of you for taking the time to make it clear

Honestly i can't thank you enough for trying to help me out with this!!! Although now i'm getting confused again.... i'm sorry if i seem dense, its just i've had 3 different sparks say 3 different things so my head is just blown!!! Yes the shower is bonded to the boiler and all the...