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  1. I

    Testing portable welfare units with built in generator

    Hi I’ve recently tested a unit and rcd times are fine and R1R2 but Ze and Zs are High values and are not within bs7671 for a tns supply , I don’t really know what ze I should be getting to start with and would it be better treating it as a TT ,I will admit I’ve never done one before and only...
  2. D

    Hyundai dhy12500se Generator Issues with 1000w MH Lights

    Hi, I was wondering if anyone could pass on some much needed help. The local rugby club have just built a floodlit area to use for training on. It consists of 3 12m columns with 1 Philips 1000w metal halide floodlight on each column with running gear etc with in the columns. The power comes...
  3. Megawatt

    Will isolation transformer absorb in rush current and not the generator

    I have a 10,000 watt surge and 7000 watt running capacity on a 240/120 vac generator. Now this is a theory I have electric heat with 10,000 watt heating elements. When the heating elements kick on it bogs down the generator to the point I have to kill the heat. The question is if I bought a 15...
  4. J

    Running Coffee Machine off Generator

    Hi I run a mobile coffee hut and have just bought a new coffee machine and new 7.5 KW Generator. The coffee machine is on 13 amp plug but requires 32 amp feed. I used it on weekend on 16 amp feed off Genny. My question is can I connect machine direct to Genny (ie not through hits fuse box) and...
  5. C

    Integrating Generator with Solar PV System

    We installed a 14.7 kW solar PV system and are now installing a 22 kW whole house backup generator. The solar panels and SolarEdge inverter are on our barn, because its roof had the best sun exposure. The panels on roof of the barn connect to the inverted inside the barn, which connects to a...
  6. T

    Old field generator?

    Was at a county show today and they had this old beauty on display. Old field generator? Anyway, thought some of you may appreciate me sharing it.
  7. C

    Hospital Emergency Power System

    Anyone have a one line diagram of a typical UK or EU hospital? How are the emergency branches divided per code? How many ATSs? What is typical?
  8. C

    Parallel generator, earthing and bonding

    Hello, can anyone advise on bonding of extraneous conductive parts when supply is from a generator run parallel with distribution network? There'll b a 200kva generator supplying spray booths that have a gas supply to them. The metal pipes aren't underground but connect to tanks outside sitting...
  9. M

    Catering van generator earthing ??

    Hi new here so take it easy chaps !! A client of mine wishes to supply their catering van from a new generator they are purchasing, I believe it is single phase 7.5kW Inverter style generator with a 32 amp socket outlet. My query is about the earthing to the van. The van has a DB inside with a...
  10. Michael J

    Domestic Standby Generator installation how do you certify?

    I don’t know if this has been discussed in the past? I have received a request to install a standby changeover generator/mains system. My question is, how do you certify the installation? Am I the only one posting on this forum?
  11. a-z electrics

    Domestic How to test/certify a small 230V generator installation?

    Hi all, Got a client with a small barn workshop and caravan powered by a portable 230V 6kW petrol generator. (Loncin 8000D-A) . The original 32A commando lead had a domestic double skt on the end, and theres another lead with a commando socket for the caravan. Theres only one 230v o/p. He asked...
  12. S

    New Generator is outputting 222-224volts

    I have bought my first generator a few weeks ago 2800watt with AVR for when I have powercuts.... The voltage/hz spec is 220v at 50hz, but on the plug sockets it says 230volts. I have plugged in a "plugin power monitor" into the generator so I can see what its outputting and it hovering...
  13. Rockingit

    Hospital 'emergency' Zs when on back-up generator

    Hi all, been a while - hello! A question for the collective brain - I'm about to do a series of inspections on an ANIMAL hospital. This in itself has always vexed me as to how to apply the special location medical rules as 1) a critical life-threatening operation is the same whether it's...
  14. C

    installing a temp generator

    I have a small bungalow sized building which I essentially a hut. They lost power and the DNO may not rectify for a while. The building will need a temp generator and only needs 3kw of power, asides from checking up on the regs can anyone offer some advice through their own experience?
  15. F

    Power for mobile catering - batteries versus generator?

    Hi all, I'm new here and have a pretty specific question. We've got a vintage ambulance we've converted to a coffee bar. There's a mains voltage hookup to a 3 way consumer unit which runs everything including a 12v charger which charges 2 x 110Ah batteries. Now, we're looking at a pitch where...
  16. K

    How not to melt a cable

    Any help appreciated, I have a basic understanding of electrics. I'm going to be hosting a small event ran entirely from one 2500kW generator. Off this I'm running two 500W speakers, a laptop connected to a mixer, two small laser projectors (doesn't specify any wattage but they're domestic not...
  17. N

    Generator Voltage Failure

    Tested one of our generators this morning, only about 76KW engine set. Started up fine, took the load of the building fine, connected a load bank, fine. Voltage readings all 240ish, temperature as expected, oil temperature as expected, coolant temperature as expected. 1.5hours later. Chug chug...
  18. Stuart Houghton

    Earthing Generator TNCS

    My customer wants to have one ring main connected via a change over switch to a generator. Earthing is TNCS My idea was is move the ring main to a new consumer unit run a 6mm T&E to the change over switch from the 32 amp mcb in the main C/U where the ring main was. Then a 6mm T&E back from...
  19. H

    Advise needed. Diesel generator loading issues

    Hi everyone, I would really appreciate some advise. I'm a domestic electrician but my neighbors asked me for some help on a issue he has and here I am. So my neighbor has a tree surgeon company, they have a yard where the cut and dry logs as well. So they've just got a new drying system...
  20. R

    Dirty generator power

    I live off grid, and use a generator to top up my battery bank in the winter when my solar is not producing, my inverter generator died, and I don't have the money to replace it, I'm using a back up Chinese nasty capacitor run geny, I would like to know if there is any device I can buy to safely...
  21. Ian1981

    Earthing arrangements of switched alternative generator sets

    Regulation 551. suggests that when supplying earthing for a switched alternative generator that fault protection should not rely upon the TN building supply earthing ie an earth electrode would need to be installed for the generator. My question is should the electrode also be connected...
  22. A

    How is a generator earthed and given neutral?

    Hi I have a question i cant seem to get an answer too. If you have a portable generator and you plug for instance a fridge or any appliance directly into it, how is the neutral/earthing provided?? I know already that normally you can connect the neutral and earth from an existing...
  23. T

    Royal Raymond Rife frequency generator

    Just throwing this out there to assay if anyone has done any work on the above or knows anything of it. Would be interesting to hear your views and thoughts if you have come across it or been involved in any way. I have been looking into this since around 2004 and attended a centre where this...
  24. D

    Why, on a given turbine, a smaller generator would generate less output?

    Hello everyone, I am a mechanical engineer with litle knowledge about electrical so I need advice from people knowing about electrical system. Having a wind turbine that I am testing at the moment, I first placed a big generator (PMG 500kW 690V @ 300RPM - 18000Nm) behind it and it could...
  25. D

    25kv generator cable size ???

    can anybody tell me what size sy cable I need for a 25kv 3 phase temp generator please to power a 3 phase machine lathe
  26. lloydy304

    Generator earth electrod?

    I wire out mobile decontamination units that have a 3 kva generator. We supple earth electrodes with our units for use with the generator. Every circuit is protected by an 30ma rcd and the generators earth and neutral are conected in the generator. Because the generator is under 5 kva, rcd...
  27. Rocboni

    45kw motor and generator problem

    Hi all, Got a bit of a problem with a new generator when starting a 60hp motor. It's a 250kva generator with a 125A mounted plug, the plug is protected by a C125 A Merlin gerin c120h MCB with combined 300mA RCD, the motor starts fine but when it changes over to delta it trips the 125A mcb (I...
  28. E

    Electrician TBuild your own Tesla Generator

    Why is this site advertising Tesla generator when we all know it is a conn ?
  29. E

    Voltage regulator which regulates voltage coming our of a DC Generator

    I need a strong voltage regulator that is used to regulate the voltages coming out of a continuous DC generator. Four poles of high current currents that connect with the thermometer to output a 24 volt voltage to the load. Control by magnetic coil files controlled by an automatic voltage...
  30. L

    Standby Generator Earthing (TT or TN-S)

    Hi Everyone The utility supply for an installation is of TT system. The Generator start point is connected to the its frame and earthed to an electrode. Thus, the installation has its own earthing electrode. I would like to know whether the installation is a TT or TN-S system when the standby...
  31. vxwestie

    Agricultural generator changeover

    Not sure if anyone else as come across this, but I've been asked to provide a changeover arrangement for a farm. It's 3phase 100amp but what provision will be needed for a generator connection out of the changeover? To my knowledge commando sockets only come in a max of 63amp.... it will be a...
  32. S

    Installing 60Kva generator.

    Hi Everyone, First post in a while. We are currently quoting for putting a 60Kva generator into a factory, this will be powering one machine only and will not be connected to the mains. It will only be used 3 times a week, this will free up some load from the main DNO supply. I have searched...
  33. D

    Catering trailer electrics

    My neighbour has built a catering trailer, which is mainly gas for the appliances that he intends to use, Bain Marie etc. He has asked me if he could have a couple of double sockets fitted to it and I said I would look into it for him. Section 717 would be applicable for the electrical...
  34. S

    Generator earth

    Hi all, first post for some time! Currently installing power and lighting into a small cabin. Supply will be from a permanently connected generator and using a rod for earthing purposes. Carrying out testing today and only getting 197v between live and rod. Guessing I may need another rod which...
  35. S

    Running 2 Metal Containers with a generator

    I have been asked of my club to wire up 2 cabins with power so they can have lights on during the dark mornings. There is 3 metal cabins in total one with a generator in it, one which is the main office and one for meetings. The 2 cabins that want power both have a C.u in them. So if i wire in a...
  36. B

    Off grid earthing system

    What earthing system should be used on an off grid install with a solar inverter, wind inverter, battery backup inverter and a 4.5kW floating earth generator?
  37. N

    EICR on DB fed from generator

    I'm carrying out some inspection and testing this morning. I've come across something new to me. I'm a workshop they have a 3 phase DB which is ONLY supplied from a generator. The site only had a single phase supply and therefore when they need to use 3 phase equipment they simply switch on the...
  38. L

    Temporary Power from Generator on an out building?

    Hi Guys, I've got a question which I think the answer would be "Yes its ok" but I'm just after a second opinion and think some of you folks might have had experience with this type of set up (I haven't). I've just wired a new out building which is going to be used as a sort of after school /...
  39. Leesparkykent

    G59 and generators

    I'm looking at a job at the mo where its looking like there is going to be backup/standby generator. Just wondering if anyone has done a similar install and been involved with the paperwork side of things? As its bigger than 16A per phase would a G59 relay have to be installed, application to...
  40. S

    Catering Van install - Earthing

    Hi all, back again requiring some transportable building knowledge, this time round a catering/burger van and its earthing arrangment. Was asked to carry out some simple repairs and replacements to a local burger van that is basically static to one location. Fed by a 3kva generator with a16a...
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