WWilts Posted April 19, 2022 Share Posted April 19, 2022 New build in progress. Three phase supply installed up to our kiosk. Kiosk is about 15m from dwelling. Smart meter will be installed in kiosk. Intention is to have 1 phase in dwelling. But have 3 phase available to dwelling for future proofing. Plus for 22V EV charger near kiosk. Question: Is that a sensible plan? If so, what SWA to run from kiosk to house? (5 core? how thick? etc. Novice here) Link to comment Share on other sites More sharing options...
WWilts Posted April 19, 2022 Author Share Posted April 19, 2022 Additionally, if solar PV panels to be added in future, what can be done now with cabling for some degree of future proofing? Link to comment Share on other sites More sharing options...
tonyshouse Posted April 19, 2022 Share Posted April 19, 2022 I would take 3 phase into house now SWA in duct then only use one phase in the house until you need more juice 1 Link to comment Share on other sites More sharing options...
markc Posted April 19, 2022 Share Posted April 19, 2022 As above, take 3 phase into the house. I pay same standing charge as I did for single phase. If it’s a big house I would even split into two CU’s on different phases or install a phase switch on CU tails in case of a power cut. Rare all the phases are taken out during a fault or line strike so you can still have power if a phase or even two are lost 2 Link to comment Share on other sites More sharing options...
joth Posted April 19, 2022 Share Posted April 19, 2022 5 hours ago, WWilts said: Plus for 22V EV charger near kiosk. What's a 22V EV charger? If you plan to feed it direct from the kiosk, you'll need some sort of distribution board and breaker for it in there. At very least make sure you have a 4 pole isolator switch on the tails after the meter so you can adapt the consumer side without having to open the meter up. 3 phase chargers are uncommon as most EVs don't support 3ph charging, AIUI. 5 hours ago, WWilts said: If so, what SWA to run from kiosk to house? (5 core? how thick? etc. Novice here) If you run 3ph to the house but only plan to use one phase you'll have to oversize the SWA considerably to accommodate it all on any phase. You're probably looking at 10mm2 minimum and in 5 core that's hard work. Another option is to put 3 core in now and duct so you can add more later. We ended up pulling a separate earth core, to keep the SWA more manageable. 5 hours ago, WWilts said: Additionally, if solar PV panels to be added in future, what can be done now with cabling for some degree of future proofing? How much PV will you have space for? If it's more than 3.68kW then putting it into multiple phases will save on paperwork so worth pulling 3phase to wherever you think the inverter might go. (Tip: they're best sited somewhere that will remain cool even on a hot day) 2 Link to comment Share on other sites More sharing options...
WWilts Posted April 19, 2022 Author Share Posted April 19, 2022 13 minutes ago, joth said: What's a 22V EV charger? sorry, 22 kW All Greek to me Link to comment Share on other sites More sharing options...
WWilts Posted April 19, 2022 Author Share Posted April 19, 2022 16 minutes ago, joth said: worth pulling 3phase to wherever you think the inverter might go. (Tip: they're best sited somewhere that will remain cool even on a hot day) Roughly how big are these inverters? Assuming space on roof for 8kW worth of panels Link to comment Share on other sites More sharing options...
TonyT Posted April 19, 2022 Share Posted April 19, 2022 (edited) You need to advise on earthing arrangement. tncs? significant electrical loads to work out current consumption. distance to house consumer unit. size of kiosk? helpful if distribution equipment is going in there too along with EV distribution equipment- Edited April 19, 2022 by TonyT Link to comment Share on other sites More sharing options...
WWilts Posted April 19, 2022 Author Share Posted April 19, 2022 3 hours ago, TonyT said: You need to advise on earthing arrangement. tncs? significant electrical loads to work out current consumption. distance to house consumer unit. size of kiosk? helpful if distribution equipment is going in there too along with EV distribution equipment- Not sure what earthing arrangement. Observed that at the boundary with public footway, where there is a hard black sausage marked "live" with a thick black cable going into and out of it, there is also an apparently copper rod about 1m long partly buried in the earth. Open to any suggestions about cost-effective earthing. Electrical loads: 4 bedrooms, normal lighting & usual kitchen appliances. Occasional power tools usage. Kiosk about 20m from house CU location The kiosk is W1130, H1490, D320. Potentially can take more than the cutouts and smart meter. Open to any suggestions Link to comment Share on other sites More sharing options...
joth Posted April 19, 2022 Share Posted April 19, 2022 1 hour ago, WWilts said: Electrical loads: 4 bedrooms, normal lighting & usual kitchen appliances Do you have Gas hob, oven, boiler, or all-electric? ASHP? 1 hour ago, WWilts said: Open to any suggestions about cost-effective earthing. Generally the DNO will inform you the earthing arrangement when they install the head, normally via some stickers on the cutout. 1 Link to comment Share on other sites More sharing options...
Carrerahill Posted April 19, 2022 Share Posted April 19, 2022 (edited) 11 hours ago, WWilts said: If so, what SWA to run from kiosk to house? (5 core? how thick? etc. Novice here) Assuming all of this will be after the meter and it is therefore your responsibility and of no concern to DNO, then 25mm 4 Core SWA, at that size conductor, armour will be suitable for earth. If DNO side they will supply 16mm or 25mm split concentric - probably 16mm as they apply a lot more diversity than anyone else ever would. Edited April 19, 2022 by Carrerahill 1 Link to comment Share on other sites More sharing options...
WWilts Posted April 19, 2022 Author Share Posted April 19, 2022 1 hour ago, joth said: Do you have Gas hob, oven, boiler, or all-electric? ASHP? No ASHP. Gas boiler. Electric double oven, induction hob EV charger will be located not far from kiosk Link to comment Share on other sites More sharing options...
Mr Blobby Posted April 19, 2022 Share Posted April 19, 2022 (edited) 9 hours ago, joth said: 3 phase chargers are uncommon as most EVs don't support 3ph charging, AIUI. Tesla and Renault Zoe have 3-phase chargers on board. Modern Tesla's are 16 amp 3-phase so 11kW. Nearly all public AC charge-points here in Northern Ireland (by ESB) are 3-phase. I'm assuming the OP drives a Tesla 🤔 We're planning a similar setup with a 3-phase charge-point near to a 3-phase meter kiosk, so this thread most informative! Edited April 19, 2022 by Mr Blobby Link to comment Share on other sites More sharing options...
TonyT Posted April 19, 2022 Share Posted April 19, 2022 probably a nice single phase consumer unit for the house, more cost effective a small 3 phase consumer unit for the EV charger at the kiosk. Lots of opinions but I think ensuring you have sufficient sized ducts from kiosk to house, kiosk to garage, kiosk to EV position, etc is worthwhile. We always used 100mm flexiducts with blue rope added in prior to backfilling. 1 Link to comment Share on other sites More sharing options...
WWilts Posted April 20, 2022 Author Share Posted April 20, 2022 On 19/04/2022 at 11:30, TonyT said: You need to advise on earthing arrangement. PME, according to a label in the kiosk Link to comment Share on other sites More sharing options...
Mr Blobby Posted April 26, 2022 Share Posted April 26, 2022 (edited) On 19/04/2022 at 05:43, WWilts said: Three phase supply installed up to our kiosk. Kiosk is about 15m from dwelling I had hoped to do the same. Three phase supply into big kiosk aout 15 metres from house. From kiosk run 3 phases to EV charger close to kiosk and another 3 phases into house. Well that's what I had hoped to do until talking to NIE today. NIE have told me that they only connect temporary supplies to a kiosk. They do not allow a permanent supply to a kiosk, only to a metre box on the wall of the house. Which means running more cable from the house back out the route of the suply to the EV charger. What a pile of crap that is. Has anyone in Northern Ireland got round this restriction and installed a permanent meter in a kiosk away from the house? I assume not. Edited April 26, 2022 by Mr Blobby Link to comment Share on other sites More sharing options...
ProDave Posted April 26, 2022 Share Posted April 26, 2022 37 minutes ago, Mr Blobby said: Well that's what I had hoped to do until talking to NIE today. NIE have told me that they only connect temporary supplies to a kiosk. They do not allow a permanent supply to a kiosk, only to a metre box on the wall of the house. Which means running more cable from the house back out the route of the suply to the EV charger. What a pile of crap that is. So what stops you getting the "temporary" meter in a kiosk, and then never quite "finishing" the house so never asking for the meter to be moved? Are they actually going to come and check and insist they move it? 1 Link to comment Share on other sites More sharing options...
Mr Blobby Posted April 27, 2022 Share Posted April 27, 2022 (edited) On 26/04/2022 at 10:46, ProDave said: So what stops you getting the "temporary" meter in a kiosk, and then never quite "finishing" the house so never asking for the meter to be moved? Are they actually going to come and check and insist they move it? NIE have told me that the temporary connection is disconnected after 12 months. It is possible to request an extension if the build is not complete but NIE will at some point disconnect the temporary supply and insist on a meter cabinet on the wall. Which is crap because as I see it there would be three conduits running down the wall from the meter box to the ground, (i) supply in, (ii) conduit running under house to internal CU, and (iii) conduit out to EV charger at front of house (near to where the kiosk would otherwise have been) I've asked NIE on twitter messaging to explain why they prohibit meter kiosks that are allowed in GB. It will be interesting to see if they come back with a reason. Edited April 27, 2022 by Mr Blobby I can't speel Link to comment Share on other sites More sharing options...
joth Posted April 27, 2022 Share Posted April 27, 2022 Does it have to be the wall of the house, or could it be the wall of an outbuilding? Perhaps a small outbuilding, that's not yet been fully built. 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now