Chris Wilson Posted May 24, 2007 Share Posted May 24, 2007 I need to run mains single phase power to the new land we have bought, a distance of about 150 metres from a workshop with a decent mains power feed into it. I want to use 3 core armored and bury it. I need to run a normal 13 amp socket at the field end. What size cable do I need, and is it readily available in more than a 50 metre uninterupted length? On Ebay most seem to be advertising 50 metre lenghts, I'd rather not ahve to try and make a waterproof undergound joint. Are there waterproof lockable boxes available, I'd want the 13 amp mains power socket in it, and a 12 x 10 x 6 electric fence energiser in it, too? Thanks. Quote Link to comment Share on other sites More sharing options...
Digsy Posted May 24, 2007 Share Posted May 24, 2007 I can't answer many of your questions but I do know that there is a formula for the voltage drop along thelength of cable for a cable of a given size. The electric regs state that the voltage drop can't be any more than a certain amount. You need to know the total load in W (or the total current in amps) that you will be pulling through the cable. You plug that plus the length into the equation and it will tel you what size cable you need. There are some pretty good DIY forums about but a lot of them will just point you in the direction of an electrician these days because a lot of work is "notifiable" under the new regs, which prevent you from doing a lot of electrica DIY these days. Quote Link to comment Share on other sites More sharing options...
Kev.O Posted May 24, 2007 Share Posted May 24, 2007 Usually 2.5mm should be ok, so if you go for 4.0mm then it should be fine Any decent electrical wholesalers can get that sort of length. If not try Cleveden Cable Company. (I think) Quote Link to comment Share on other sites More sharing options...
JustGav Posted May 24, 2007 Share Posted May 24, 2007 I ran 4 core 3mm wire to my shed, and put seperate RCD on it in the kitchen where it is wired into the plug, just to be sure. It handles the Arctec 201 185Amp MIG welder... Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 24, 2007 Author Share Posted May 24, 2007 But how far away is the shed? Quote Link to comment Share on other sites More sharing options...
b_have Posted May 24, 2007 Share Posted May 24, 2007 But how far away is the shed? Further since the explosion Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 24, 2007 Share Posted May 24, 2007 Quote Link to comment Share on other sites More sharing options...
Graham S Posted May 24, 2007 Share Posted May 24, 2007 Far enough you can flick a fag at!! Quote Link to comment Share on other sites More sharing options...
JustGav Posted May 24, 2007 Share Posted May 24, 2007 Further since the explosion But how far away is the shed? Hahahahahahha It is about 10m of cable length to be fair, but I'm also putting a fair load on it with the welder so I'd rather be safe than sorry with an underground cable melting. Quote Link to comment Share on other sites More sharing options...
Bob Posted May 25, 2007 Share Posted May 25, 2007 You can buy resin jointing kits from screwfix now for a fairly reasonable price. Quote Link to comment Share on other sites More sharing options...
Mike M Posted May 25, 2007 Share Posted May 25, 2007 Try and get some Hawk Ex 'd/e' glands or some sort of IP 68 rated glands for the cable entry into the JB's as they will almost guarantee no moisture ingress over the years. The Hawk glands are def overkill but they do make off the wire/ braided armour nicely and being brass they wont seize up so quick. Not sure on cable size tho for that sort of voltage. Quote Link to comment Share on other sites More sharing options...
robbieg Posted May 25, 2007 Share Posted May 25, 2007 right go to c.e.ff city electrical factors they can should be able to help for a 150m run id put in at least 4mm and you may want to run a coms cable at the same time you never know net acess and all that;) were no one can see.!!!! they will also do the right type of glands..etc.. or edmonsons not to bad,, Quote Link to comment Share on other sites More sharing options...
edge Posted May 25, 2007 Share Posted May 25, 2007 I need to run mains single phase power to the new land we have bought, a distance of about 150 metres from a workshop with a decent mains power feed into it. I want to use 3 core armored and bury it. I need to run a normal 13 amp socket at the field end. What size cable do I need, and is it readily available in more than a 50 metre uninterupted length? On Ebay most seem to be advertising 50 metre lenghts, I'd rather not ahve to try and make a waterproof undergound joint. Are there waterproof lockable boxes available, I'd want the 13 amp mains power socket in it, and a 12 x 10 x 6 electric fence energiser in it, too? Thanks. You can buy lockable isolator swtich boxes and they are water proof - IP55/65. How many sockets are you wanting to have and how much current does the fence enegiser use ? You can save money on whatever size cable you want by using two core armoured as you should earth the armoured part anyway. A good electrical wholesale place should be able to get you any size upto a 500 meters Also you can work out volt drop and factors here http://www.ktassemblies.co.uk/technical.html It has no table for armoured but you know what i mean. Quote Link to comment Share on other sites More sharing options...
JustGav Posted May 25, 2007 Share Posted May 25, 2007 ryou may want to run a coms cable at the same time you never know net acess and all that;) were no one can see.!!!! And people laughed at me when I said I was throwing in a cat5 lead inside a conduit for data comms.... Quote Link to comment Share on other sites More sharing options...
Kev.O Posted May 25, 2007 Share Posted May 25, 2007 Might also be an idea to run an alarm cable down there Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 25, 2007 Author Share Posted May 25, 2007 Might also be an idea to run an alarm cable down there An alarm cable? What for, in case Janes little babies want mummy? Quote Link to comment Share on other sites More sharing options...
Chewie Posted May 25, 2007 Share Posted May 25, 2007 The bureaucrats introduced red tape in 2005 that stops you from doing any elecrical work like this unless you're a registered sparky-nician. If you do the work yourself you have to find one who will certify it as a job well done. Apparently. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 25, 2007 Author Share Posted May 25, 2007 I wouldn't dream of doing the beureaucrats out of their pound of flesh Quote Link to comment Share on other sites More sharing options...
edge Posted May 25, 2007 Share Posted May 25, 2007 The bureaucrats introduced red tape in 2005 that stops you from doing any elecrical work like this unless you're a registered sparky-nician. If you do the work yourself you have to find one who will certify it as a job well done. Apparently. use some red and black cable then its anyones guess when it was done. Quote Link to comment Share on other sites More sharing options...
suprasteve1979 Posted May 25, 2007 Share Posted May 25, 2007 Depends on the load at the other end. A 4mm cable at 150m will carry about 1.5KW without too much of a volt drop at the other end, any more then you should look at getting some 6mm cable. So if its just a few lights and light tools 4mm but if you want a kettle and toaster in the shed get some 6mm Thinks its about £1.90 a metre form lockwells/edminsons etc and they will cut it too length Quote Link to comment Share on other sites More sharing options...
Thorin Posted May 26, 2007 Share Posted May 26, 2007 An alarm cable? What for, in case Janes little babies want mummy? http://www.chriswilson.tv/cows.jpg Ah you got them now then? More pics please You wouldn't want one of those charging at you! Quote Link to comment Share on other sites More sharing options...
Paul Posted May 26, 2007 Share Posted May 26, 2007 use some red and black cable then its anyones guess when it was done. Get some of the old colours if you can as it loads cheaper, got this for my garden. As far as the new colours letting them know when it was done, they were selling the new colours six mths to a year before bringing in the regs so it's no real gauge on the time it was fitted. Quote Link to comment Share on other sites More sharing options...
robbieg Posted May 26, 2007 Share Posted May 26, 2007 dont for get to dig the trench deeper than 18" or more and then put plastic id marking tape over it..!! find a local sparks to test it when done dont want to blow the missus up now do we!! just make sure you follow the regs.. loads of info, people can get killed if not done right and its your neck on the block!!!! if you dont have it tested.. or there neck !! Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 3, 2007 Author Share Posted June 3, 2007 Thanks everone, sorted now i bought some 4 mm three core on Thursday, cheers. Quote Link to comment Share on other sites More sharing options...
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