volts | Page 6

volts

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  1. T

    Voltage drop/ Cable size query

    Hi All, Quick brain pick. If I don't care about voltage drop (eg. all components on the circuit will run between 100-250V) and current capacity is within limits, are there any other considerations when deciding to use a smaller than 'normal' cable size? 200m run - 10 x 300w loads equally...
  2. robd

    Hot tub volt drop

    Hi All, Been to look at a job with a hot tub 27A load, 30 metre run. Don't do much volt drop calculating but here's what I did, anyone disagree? Thinking 6 mm armoured so: 7.3x27x30/1000=5.91v max permissible (5% of...
  3. rustynails

    Accessibility of a low voltage transformer

    Have come across a low voltage transformer which has been placed in the ceiling above a shower not accessible at all which means the customer cannot change the time period on the overrun. I can't find anything in the regs that says the transformer needs to be accessible. Anyone have any thoughts...
  4. ses

    Fluke t150 voltage testers

    Brand new fluke T150 voltage testers for sale in packaging Collection west london or postage at £5 These retail at £88 online Bargain at £70
  5. Pete999

    Martindale voltage indicator and proving unit

    I have as the title suggests these items for sale, £70:00 for both PM me if interested
  6. C

    120volt plug from 240 volt wire

    i HAVE 240 volt wire feeding a submers water pump going down long hill.at bottom of hill is a junction box with 4 wire for pump on a dryer plug.rest of 4 wire feed plugs into it.for pump.i want to hook a 120 volt plug in at this point using the existing 240 volt 4 wire with 2 hots.can i do this...
  7. L

    Volt drop question

    Hi I've got a question regarding volt drop. When calculating volt drop to a 3 phase distribution board do I use 230v (11.5v) or 400v (20v) The board I'm attempting to put a cable to is 75 meters away. Design current 100A From TABLE 4D4A Cable selected = 25 mm² For 25 mm²: mV/A/m 1.75 for 230v...
  8. G

    using voltage drop too your advantage

    I have an install to complete where I have to take a 100amps per phase three phase supply over 330m too power a new installation. The power at source is obviously 415v (give or take) however the rating on the machine at the other end is 400v (build in Europe somewhere). I'm currently having a...
  9. I

    Disappearing voltage

    Can anyone help? A customer has a light fitting in a bedroom (5 bulbs) which is switched two ways with a dimmer switch by the door and a switch by the bed. He states that at some point he switched it on and nothing happened. He assures me they were working at some point before!!!!! He replaced...
  10. Dan Brown

    fuse connection unit and outdoor lighting low voltage

    Just wondered if it's a no no to run 2 low voltage lights from one FCU I have wired up sockets and lights to my decking outdoor accessories of course. From my sockets I have spured of to a RCD FCU from this I have my decking spotlights. So my question is can I run some LED strip lights to...
  11. G

    two-pole voltage detector Guidance Note GS38

    All, I have my niceic inspection coming up soon and am a little confused about the requirements for a 2 pole voltage detector. According guidance note 3, a multifunction tester, multi meter or a volt stick can't be used which is fine, but what I want to know is if a clamp meter capable of...
  12. 3

    earth voltage

    I am checking an install and noticed the voltage between line and earth is 190 volts. I checked incoming supply voltage with the main consumer unit isolated and am getting 220v l-n and l-e when I switch cu on voltage l-n is 220 volts l-e drops to 190 volts I have disconnected all circuits and...
  13. N

    Solar PV volt drop and cable sizing.

    Morning gents, just a quick one. I've posted this already on the Solar PV forum but thought I'd add it here too as VD and cable calcs are always a good topic of discussion. So I have a Solar PV system to install this weekend, its a 10KW single phase system on a farm. I'm going to be running a...
  14. D

    Voltage drop tables...

    Just a quick one folk. Do the voltage drop tables in the BGB apply for ELV systems? I'm converting my van to a camper so I'd adding 12v circuits for lighting, water pump etc. It's all going to be run in 3183Y flexible cable, can I use the VD values per mA/m in the regs, the same way as I...
  15. J

    Plastering over low voltage wiring

    Have just replaced my low voltage thermostat with NEST version. Have moved the new thermostat by extending wiring with connection box (wiring is low voltage). Is it safe to plaster directly over the connection box and wiring?? Cheers.
  16. G

    Earth fault loop impedance

    How does earth fault loop impedance and disconnect time requirements change for 3phase 3 wire 230 volt systems where the phase to earth voltage is 133 volts instead of 230 volts?
  17. S

    Voltage drop

    I have a question asking how to determine the volt drop on a cable whith an unspecified length... Any clues... Anybody? :-)
  18. P

    Voltage drop workout

    Hi guys. Those who don't know me I have recently started on my own. I am testing my understanding, re Volt drop. And trying to stick to one formula. But I'm getting mixed results. My example scenario would be to feed a CU in an outhouse / shed. The CU will feed sockets, lights and some form...
  19. Simon-0116

    neutral to earth high voltage

    Been to look at a faulty socket on a rcbo and wont hold in, tried to test trip times etc but reading voltage on earth. Supply is tt, 3ph and 1 ph to a domestic property. Shared earth rod. Cant turn house off as belongs to separate person. So tested voltage at 3 ph db, 230, 400 v etc but...
  20. Worcester

    Voltage Optimisation - The true value for homeowners ?

    Just got this in an email today, kind of sums it up really !

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