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commercial

  1. A

    UPS protection

    Hi everyone, would be great if you can share your experience on type of protection devices recommended on UPS system feeder/upstream? as you know, in some type of critical installations such as hospitals, bank servers,..etc, the client does not want to see UPS loads gets cuts off in no...
  2. Darren Evans

    Buzzing dimmer and LED lamps

    Morning chaps! Advice needed please. Is there a tried and tested combination of manufacturer(s) for reducing the annoying buzz from dimmer connected (dimmable!) LED lamps? In the particular example I am having right now, I have 5 lamps on one dimmer switch, 3x ES and 2x SES. One or more of...
  3. S

    Winning commercial work

    Guidance on how to win more commercial work. We are a small electrical contracting firm Who have a lot of domestic contracts that serve us well. We are looking to gain more commercial work in the following areas:- hotels, gyms, public sector organisations. We are aiming at local medium sized...
  4. T

    Installation method

    So, we’re creating office space out of 2 classrooms. Metal stud wall will be put up, grid ceiling everywhere. We’ve had a price by one firm. I think it’ll be twin and earth lashed in in the ceiling void based on the price (although i haven’t seen spec yet). Given a job like this, would you find...
  5. M

    Shower Wiring in Granny Annexe

    Hi All, I am Faraz, I'm a Mechanical Project Engineer by trade. This is my first post on these forums. I am looking for some insight into a problem I'm having. I currently have a 6mm Cable running from the main RCD to a 9.8kW shower in a Granny Annexe. the wire currently runs about 25m long...
  6. S

    Tips on getting cable through kopex

    Hi guys does anyone have any tips for getting a 40-50m length of 10mm earthing conductor through a run of 20mm Kopex? Many Thanks
  7. T

    UK Anyone from the north east interested in giving a price?

    We’re looking to be creating office space soon which will require a rewire, but I’m just absolutely swamped. Anyone from the north east interested in giving us a price for the works?
  8. S

    Technical advice required - metal socket or plastic? / Trunking?

    Hi all Recently my company (I'm just an employee) moved into a new unit and have installed some shelving, the BigDug kind. We've had plug sockets located above (2) each unit to provide power. This was done by the electrician so that's all good. I need a plug socket on each shelf (5 in total)...
  9. P

    Supply to apartments

    Hi all, Seeking some general advice. I’m planning to split a property in 5 apartments with their own fuseboxes and supply meters. However if i chose to revert the property back to run off one meter what would be the best way of doing this? I was thinking a main distribution box that supplies...
  10. G

    3 phase shared supply

    Hi all, Im looking for advice about a 3 phase supply. I have such a supply on my property but 2 of those phases are used by adjoining properties that are not mine. Firstly is this "normal"? Secondly is it possible for an increased power load supply in this case? I have contacted northern power...
  11. D

    UK hmo wiring advice

    Hi My mate has purchased a house which is being converted into multiple occupancy (8 rooms). Unfortunately the spark passed away halfway through the job. each room has been fitted with a 2 way CU with 16a+6 breaker fed via a 4mm cable. He installed double stacked hager board with 2 main 100a...
  12. B

    5 core SWA 120mm pvc cable

    Hello all So Im doing the groundwork to install a electrical kiosk and lay 250m approx. of cable to live up an off grid property. I am not an electrician i am only doing the hole digging and slab making for the kiosk - I will not be wiring anything in - not my thing :) a qualified company...
  13. T

    UK New Lathe in the Workshop

    Over the summer we had some single phase workshop gear removed, and in it's place was delivered a second-hand 3-phase lathe. At first I was going to drop in a new circuit, as naturally, the single-phase circuit that exists is useless. However, this new lathe is going right next to another lathe...
  14. U

    USA Buck or boost for car lift

    I'm looking for help on fixing a car lift for a customer. He bought a used lift that calls for 30 amps at 230 volts but his building only has 120/208 voltage. Should he have the motor changed out or should I boost the voltage somehow? And what would I need.
  15. ccudal

    Access Path of more than 100 feet high building

    Hi, this is from NYC fire code. does anyone knows if there's a code for building more than 100 feet. Thanks " 504.4 Rooftop Access and Obstructions The rooftops of buildings 100 feet (30 480 mm) or less in height, except rooftops with a slope exceeding 20 degrees (0.35 rad) from the...
  16. kenny maccuish

    Found during fault finding

    Hi guys just wanted to ask if there are any Irish electricians here that can tell me whether these examples of making off SWA are accepted in Ireland. Just had to fault find a light not working in a garden and opened up a couple of manholes to find PVC 4x4 waterproof boxes with SWA going into...
  17. J

    3 phase supply

    Next month i will be working on a farm putting a new 3phase board in to supply welders, plasma cutters etc. 3 phase comes into electric shed (Tnc-s) and then supply into barn comes from 80A 3ph MCB with a 300 ma trip upfront. Supply enters barn and goes into an existing board with the earth path...
  18. B

    Electric Gate - have it open ready as you arrive

    Hello all - I would really appreciate some advice please. I am conducting the groundworks to install a 6m opening "Hi Motion" sliding cantilever electric gate (9m length in total). I have to commission an electrician to make it all happen but the client has asked for a cabled means to have the...
  19. 2

    Welder - what sort of amp input it will need at 240v

    I recently bought a welder (picture attached) I was wondering what sort of amp input it will need at 240v
  20. 2

    Wiring up my shed 240v

    I am going to get an electrician to hook the wire up to my fuse box but I was wondering what cable I will need. I am planning on running the cable myself to be hooked up later I am after a cable to withstand 60 amps. What cable will I need
  21. T

    Need to extend a RFC - Zs not good enough

    Just after some thoughts on this. I need to extend a RFC, but the Zs isn't good enough to comply (it doesn't comply currently, but it becomes my problem when I touch it). It's currently about 0.70 ohms - what I need to extend it by will be minimal, maybe taking it up to 0.75 ohms. It's protected...
  22. GBDamo

    63p + VAT Per item

    PA testing;- Customer:- "can you quote these sites for PA testing" Me:- "Sure it'll be £1.50 + VAT Per item" Customer:- "We've been quoted 63p +VAT Per item, can youatch them" Me:- "No" Customer:- "Why" Me:- "We intend doing the testing" Sick of them, and hate PA testing but we need...
  23. A

    Commercial Fridge tripping

    Hi My name is Allen Brauteseth from Cape Town South Africa. I am a Qualified electrician and am sitting with a problem being I have a commercial fridge for cold drinks that trips out the earth leakage after running for 10 minutes please could someone help me as the supplier says there isn't...
  24. W

    Have I got a big problem!?

    Hi, i'm currently working on a project where 10 flats are being built on one side of an old silk mill. We are having a new cable put in and the origin upgraded etc. This type of work has to be done by NERS registered electricians so an outside company recommended by the DNO came yesterday and...
  25. Midwest

    Supply to 3 phase DB tripped

    As above, place I work at as maintenance, had supply tripped off at the weekend. Not some stuff I’m fully conversant with, so just seeking views here. 3 phase DB supplying power and lighting for rooms, using RCBO’s. Panel has this as main switch; The supply panel is this; From what I can...
  26. J

    Commercial TT supply with TNS sub mains

    Would like your opinions on the following setup. 300A 3 phase TT incoming supply feeding 15 units with 50A TNS obviously some link somewhere between Neutral and earth but haven't found it yet. I would think that each unit should be TT not TNS thoughts please
  27. L

    Connecting 2 12v fans

    Hello, I need some help with this: I have a Xbox one S where I connected 2 Fans (there is usually just 1 ) parallel to the 12v sourve from the motherboard. Fan 1 has 22mA and Fan 2 has 29mA. My Question now is, if there is any risk to burn something. I dont know how much amp is delivered by...
  28. GBDamo

    Intermittent fault finding.

    Was called to a commercial lighting issue on Friday where the circuit had tripped, RCBO protected. On arrival reset the RCBO and all held, three lights weren't working, two were lamps and one had a black scorched ballast, replaced this and all works. The circuit has eight lights, two PIRs a...
  29. T

    Voltage dropped

    So after what I thought was a productive day yesterday replacing old lights with LED panels, 3 of them weren't working. Turns out the voltage between line and neutral was about 210 at each of the 3 points, 245 between line and cpc. Voltage was 245 between line and neutral at all other points on...
  30. S

    DOL Starter / automatic dust extraction system

    Could I use a DOL Starter circuit to create an automatic extraction system? I was thinking that I could replace the start button and simply wire in a socket instead. So hypothetically if I plugged in and switched on an electric palm sander, it would start up my dust extraction systems (via the...
  31. T

    Commercial New DB (additional)

    Hi all, Apologies it's been a while since I was last here, hope you are all well. One of my summer jobs is to move a computer room, and it's going to require an additional 3 circuits to power the computers. The board nearest this room has an old 3-phase memshield 1 board that is at capacity...
  32. J

    EXOR intelligent lighting Box

    This might be daft but i am currently doing remedial work on a commercial site and there are lights being served from a EXOR lighting box. Undertaking a continuity R1 and R2 at the incoming on the box i have continuity but at the light fittings nothing, i have changed the plug and the flex still...
  33. Zdb

    Air Conditioning and Refrigeration Industry Board (ACRIB)

    Anyone else have to hold one of these cards in order to purchase fluorinated gases? It would be nice if the ECS/JIB card could incorporate the F-gas qualification so I dont have to renew and pay for 2 separate cards and 2 separate health and safety tests.:cry:
  34. Ashley-Joseph

    First day as a mate

    So tomorrow I have managed to find work as a mate installing conduit and cable trays. This is my first time other than collage working as a mate and I am nervous as I have never installed conduit on big buildings any advice would be helpful also I was told to take basic hand tools any advice on...
  35. T

    Can anyone recommend a tender company ?

    Hi can anyone recommend a Glasgow or Scotland company that will price commercial tenders for me. I don't have the time to spend pricing larger jobs. Thanks
  36. E

    Electrical Zones

    Hi, I am in a debate with a friend who is also an electrician who is backed by his boss in this. Now I am aware of all the electrical zones like - 150mm from a ceiling and 150mm from the corner of 2 adjoining walls or partitions and horizontal or vertical from any accessory or switch gear. But...
  37. P

    Commercial Dating old Bill switch fuses

    Testing a set of offices today and each floor is fed from the switch fuses (?) in the basement. There is a separate set of fuses for each floor in a Ryefield board but I am trying to date the overall installation. The switch fuses are as shown and I suspect contain asbestos - and before anyone...
  38. G

    half hourly import

    We have a strange problem. We have a wind turbine and obviously when the wind doesnt blow we have to import electricity. However intermittently (on a monthly basis) we have import figures that are maybe three times what we would expect based on the maximum load we could generate. So we have a...
  39. D

    Two post carlift single to three phase

    Has anyone had any history of powering a three phase motor from a single phase supply? Is there a preferred/best way of doing this? i.e.single phase to three phase inverter/VVFD, convertor or using capacitors etc. Not my usual avenue, but I have had the question put to me, so I am trying to get...
  40. C

    Commercial kitchen job help

    i have installed some fused connection units in a commercial kitchen, normally in domestics i omit supplementary bonding due to main bonds and RCD protection being in place. Whilst my circuit has RCD protection there are existing circuits with no RCD protection and out of interest to what...
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