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  1. C

    Big load on a long run

    A customer has recently moved into hes new home and has a large shed fed with 2.5mm swa on a 80m run! Swa is protected by 20 amp mcb but the load at the shed end includes two 2kw heaters plus lights and sockets that he has been using and would like to continue to use. Volt drop calcs say he...
  2. L

    full load current of a 3phase 1.5Kw motor

    can anyone please help me with this. how to calculate th full load current of a 3phase 1.5Kw motor, i need to know this to set the overload relay to the value, thanks
  3. A

    RCD Tripping Under load

    I have a split CU and have just added a new ring (14 sockets) a 10.5k shower and lighting circuit. All of these are as a result of a third floor being added to the house. Everything works perfectly but when the shower is on and I use my drill in any of the 3rd floor sockets, the RCD trips. I...
  4. C

    throwing a switch on small load has fried equipment !! any advice please !!

    Hi guy's I am trying to seek some help on surges..... we have currently been carrying out testing across different sites for a big client. We have switched an isolator on whilst on load at the mains and it has cooked the equipment :( the particular building to give you an idea is a storage...
  5. Joe S

    Neff Induction Hob Power and Load question?

    I have a customer who is having a Kitchen fitted and has all the appliances picked out and ordered. The hob is an induction type hob and it says in the Kitchen Costing that it is a 20a Load required. When investigating the actual spec of the hob it states clearly that it is a 4.6kw Hob. I just...
  6. S

    Electrical load trending for a factory

    Hi all, looking for some advice on gaining a trend profile for the demand of our factory. At present, we have energy meters on all our larger bits of plant, consisting of ct's on each phase to a digital meter. The meter then gives out a pulse to our PLC which gives us our (in this case) monthly...
  7. S

    load neutral melted in 2 spurs

    Just been to neighbours house because he said cooker was not working. Turns out the fan oven was fed via a fused spur of what appeared to be the kitchen ring. However couldn't get continuity between feeds so is a radial on 32A breaker or spur feeding spur. (neutral on load side of spur had...
  8. K

    16kw 3 phase load. do I NEED 4 OR 6 SQ CABLE? Thank you

    16kw 3 phase load. do I NEED 4 OR 6 SQ CABLE? Thank you
  9. DaveVector

    Problem with split load CU

    Hi Folks, I've had a strange and frustrating day today. Installed an MK split load Consumer unit to replace two rewireable fuse boards. Earth system is TT 14.5 ohms PFC is 1.86 M ohms I've split the load over two 63A 30mA RCd's as follows (left to right from main switch): Oven, Downstairs...
  10. A

    2 way Isolator For GSHP immersion with 2 supplies and 1 load

    I am going to fit a 3 phase 6kw immersion heater in a 500litre cylinder. this forms part of a 30kw GSHP system. The immersion is required as top up when the GSHP is not enough to generate enough hot water and the immersion kicks in via GSHP control to lift the temp further. It is also required...
  11. P

    bench mounted pillar drill running at a reduced speed even when its not under load

    hi guys, We got a bench mountepillar drill, which is running at a reduced speed even when it is not under loadconditions.what could be the fault?
  12. N

    Split load dual RCD

    Please excuse my ignorance but what is a split load dual RCD,or a split board. Don't slate me I'm based in Ireland.We use RCD's and RCBO's. I'm just curious.
  13. F

    Unbalanced Load

    Would someone please advise me on the correct way to calculate the main protection device required when I have two 25KVA 2 phase 380vac transformers with a secondary voltage of 120vac. The First transformer would be connected across phase 1 & 2, the second across phase 2 & 3, therefore giving me...
  14. Rockingit

    LED lighting dropping out under circuit load

    I have a complex domestic - incomer is to a primary board in a pump house, main house is fed from a sub board via a 50m 35/3 SWA on a DP B63 (+ shunt). Two other sub boards, plus a load of dedicated radials all doing various 'heavy' services like water plant, ground source etc. Being a new...
  15. S

    17th Edition and the Split Load Board

    Going to sign up for my part p next week - I have a lovely CU change in a small bungalow to do which I will submit for the inspection. Going with Elecsa. The small bungalow only has: 1 ring final 1 lighting circuit 1 shower 1 16a feed for the boiler I'm just thinking that I can put in a...
  16. Joe S

    What load can this 2.5mm T&E take???

    As above, I have a plumber who's changed the water heater on a finished garage annex that we've been doing. The original one was 1.2kw in a bathroom undersink unit. There is an electric rointe 750w towel rail aswell so I put the two on the same circuit to save ways in the new board. He now wants...
  17. G

    Apartment Load Schedule - Safe?

    I'm just about to move into a new apartment in the Philippines. I know the electrical code here will be different here to that in the UK, but if you could tell me if it's safe, or whether we're all going to burn to a cinder, that would be a great help! :) I've attached the load schedule. I'm...
  18. O

    Calculating circuit load

    OK, got my tin hat on and have my running shoes on so I can to the bunker...... Looking at a customers "downlight" design for the kitchen/breakfast/family room. They have 32 lights marked and yes, they are planning on buying 240v x 50w fittings. Calculating load says you should use 100w per...
  19. jason121

    Building Heat Load Design

    Does anyone know much about heat load design or were i can purchase software
  20. S

    Split load and HI board question

    I've got a consumer unit to change which is tight for space. It's a neighbours house and when I did my board at home I used an 8 way wylex and RCBOS, this worked out ok but it might be a bit dear for the customer compared to a dual RCD set up. The only issue is the customer had a burglar alarm...

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