incoming | Page 5

incoming

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  1. N

    Acceptable incoming voltage from substation to shop outlet

    Hi, I was wondering if anyone would know what the acceptable minimum and maximum on a single/three phase main incoming voltage should be. From what I have gathered you have a tolerance of +10 230V -6. Could you also quote from where it is mentioned in the wiring regs. Thanks.
  2. C

    3 phase Incoming Supplies

    Hi, With reference to the main incoming supplies on mainly 3 phase and the requirement to fill in the Type of supply & the fuse rating for the supply, sometimes together with the Main switch details - I often have dificulty with these as the majority of times the supply cable and incoming fuses...
  3. R

    transformer design using relay and contactors

    ok,lets say the transformer getting input voltages 380-400-440-480-660-690 V and out put is 230-440 v,the tappings provided for the incoming voltages but the incoming will be the same connection either it can be of any voltages,how can it be done by the use of relay and contactors for different...
  4. G

    voltage optimisation development - are you looking for a more reliable unit?

    We've got a problem with a VO unit we've fitted, and after speaking with all the manufacturers of full house domestic VO units (ie not Vphase), we've realised that they're all far from ideal, and this is the sort of glitch we're going to be coming across time and again if we keep installing...
  5. D

    Hey... Noob incoming!

    Hi all. Just after registering, I'm an electrical contractor from rep Ireland. just kinda stumbled into the the forum. Said I'd check it out.
  6. C

    Incoming headache!!!

    Hi all, hope your all well, so i've been asked to quote a job for my local nursing home. its a 45 bed place, with a 3phase 315A supply. there now wanting to build 10 X 2 bed apartments, with there own kitchen, shower room etc. (i'm thinking 50/60A supply to each at least) there wanting to come...
  7. 5

    A couple of AM2 questions.

    Hi all, I'm new to this forum and its due to the fact that I have my AM2 exam this coming Monday. I just have a few questions. - Do I need to earth bond the cable tray? - I know that the External Loop Impedance Test is on the incoming side of the installation, and that when testing i need to...
  8. P

    polarity testing

    hi guys, could do with some help. I undetand how to do my polairy testing on a normaly circuit. e.g lighting circuit. but how do you do polarity testing of the incoming supply? thanks
  9. C

    Size of incoming mains cable?

    What is the general size of a incoming mains into a small 3 bedroom house? The main fuse is 60 amp. The enclosure where the mains splits and goes to the main switch is sealed and crimped so couldn't look but the tails look to be 16/25mm. Sorry I don't have a pic as a big cupboard was built...
  10. R

    PIR on Caravan's help please . . .

    Hi guys, am new to the forum although I have been reading threads on it for a while. I am looking for a little help on the job I am currently doing. I am currently carrying out PIR's for a number of caravans on a large park, but am getting pretty puzzled when coming to fill in the 'SUPPLY...
  11. S

    Connect PV into main breaker in CU

    Is it possible to take the PV circuit from the inverter via it's own RCBO in the CU into the incoming breaker thus connecting to the main live tail before the house circuits. Will the PV then only flow past the breaker if it is required to feed house load and any balance will be exported...
  12. 5

    Incoming tails 16mm

    If a house has dno tails that are 16mm2 tails. What amp iso switch should be fitted ?
  13. E

    main incoming on a tt

    went to a job couple of days ago where supplier hadnt supplied earth and looks like it was taking from the water pipe. Mains water had been up graded to plastic so that wasnt doin the job anymore. So somewhere down the line someone had come along and stuck a spike in. I did a test and got a...
  14. P

    Incoming Supply

    hi guys i am going to quote for a complete rewire of a detached house. the current supply comes overhead via SWA from an adjoining building about 20' away which has the main incoming supply and fuse with PME. this building only a has light and a couple of sockets. is it okay to take this...
  15. F

    mains supply to flats

    had a customer enquirey to change card meters in some flats each flat is fed with 10mm twin and earth and each flat has its own earth stake on fuse fusebox side of flat,each flat has a 30ma rcd inbetween incoming supply cable and fusebox. however there is no earth stake for the incoming supplies...
  16. D

    When to upgrade a incoming supply?

    Just after some thoughts from you guys. Working on a job at the moment where the loads on the supply are increasing daily! Currently have a standard 100A single phase supply in but the customer is having a gym installed including a steam room, sunbed and two air con units (16A each). The next...
  17. D

    Pros & Cons of splitting incoming tails instead of using CU dedicated feed ?

    Just wondering if some of the experts thought there were definite advantages & disadvantages of splitting the incoming tails using a Henley Block etc and supplying a separate dedicated supply to the PV system as opposed to simply using a dedicated MCB/spur within the CU ??
  18. A

    Live Testing - PEFC / PSCC

    After a little bit of advice please We are doing our Dead and Live Testing at college tonight. I am ok on most of it but due to not having much time to practice our live testing I need a bt of advice. Live Test: CCU breaker off Prove VID - Test for dead with VID - Re-prove Ze - remove main...
  19. M

    3 pole incoming switch

    hello guys, A 100a 30ma TP & N incoming switch for a three phase board.....is that 100a for each phase, or 100a for all three together? Many Thanks
  20. L

    How to recognize incoming earth systems quickly

    Hey sorry probaly seems like a real amatuer question to a lot of you but im still in training (L3 2330) and have difficulty in telling a tnc-s from a tns. i know a TT is for rural locations and comes from an earth rod but is there any surefire way of recognizing tnc/tncs/tns quickly? Thanks

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