This is not my boys area, but I suspect this is going to be a large sized cable.What divesity would be applied to 5x16amp sockets for 5 touring caravans on a farm caravan site?What size SWA would be required for a 300 metre feed from the farm supply to the site?
Your comments will be appreciated.
Welcome to the forum Peterson...What divesity would be applied to 5x16amp sockets for 5 touring caravans on a farm caravan site?What size SWA would be required for a 300 metre feed from the farm supply to the site?
Your comments will be appreciated.
Although this questions refers to lighting & shower blocks...Subcategory - 1. BS7671 Can you offer any help on calculating maximum demand for caravan park? The park has 61 static caravans and 120 touring "hook ups" plus street lighting and two shower blocks. Also office and workshop.
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Can I ask you to refer to IEE Guidance Note 1, Appendix H.
However as stated in GN1, '....it is impossible to specify the appropriate allowances for diversity for every type of installation and such allowances call for special knowledge and experience.'.
Street lighting - 100% of the load must be considered as they are all likely to come on together.
Has the shower area electric water heating, are the lights on all the time?
How many static caravans are used at any one time? Similar with the touring hook ups? What is their maximum demand?
If this is an existing site, see if there is maximum demand metering, or try current monitoring.
Sorry if vague....
GOOD NEWS:-I did some work on a static site a year or so ago, they had a 400kVA transformer supplying 440 static vans (50A sub mains supplying 4 vans each - 10A supply to individual vans), about 12 touring pitches, shop, shower block, laundrette, offices, workshop & street lighting.. they had max demand metering and it never got up to 400kVABTW. showers h/w is heated by gas, tumble dryers (gas heated)
Right... lets assume 10A per van... max all vans 5 x 10A 50AWhat size SWA would be required for a 300 metre feed from the farm supply to the site?Your comments will be appreciated.
reg 708.530.3 Pg 191. (paraphrase version)Caravan pitch supply equipment located not more than 20m from the connection point on leisure vehicle.
note: Not more that 4 should be grouped at one point!
SO...reg 721.55.2.6. Pg. 213. (also paraphrase)Means of connection to the caravan pitch socket outlet shall be supplied via
BS-EN 60309-2 (blue commando plug/socket),
Flexible cord 25m (+/- 2m) C.S.A. 2.5mm for 16A
allegedly!!! ; \ :^O :^OThanks for all the info to date. So quick and knowledgeable. Plenty of good ideas.
This is a new site and I agree that 10amps/unit should be ample.
The farm is PME. Do you say that I can use a 2core cable and go to TT at the remote end with earth rods, if so where is the SWA armouring bonded to?
I think that the 70mm cable might be the best bet (
]with a little nudging and persuasion we could get this topic round to our favourite "exported earth" discussions! ]
I do believe it was pre-17th Edition.Lets wait & see if Admin was right and if KME can put a bit of input to verify or correct any points discussed so far?? ?:|
Ohh, Bless...... (you ARE naughty........)]
I do believe it was pre-17th Edition.
Too much information!!!Sorry for the delayed response guys - Sunday is my wine&nookie day ; ) .
oh eck!!! :OAs Our Admin alluded - We had a job a few years ago' date=' TT`ing a caravan park. Luckily, I was employed at the time, and hadn`t priced the job.
We arrive first day, earth rod, meet lump hammer. Rod fairly flies into the ground - no Ra reading at all. OK - [b']screw on a second rod - (don`t tap it - whack it).
Same result.
Turns out I had to put nine rods on in order to get a reading - The caravan park is on a flippin` sand dune!!!!!!!
We`ve got seventy odd pitches to do. We brought eighty five rods, and I used 9 of `em on the first pitch! and the second, and the third...........
That was a lesson I very quickly worked out bud - Very expensive mistake:_|Too much information!!!oh eck!!! :O
PMSL at the earth rods!!! :^O:^O:^O:^O:^O As was I mate. :^O
me thinks a good lesson..
Do a sample test inserting one earth rod test before quoting for several pitches!!! :|
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