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  1. Zdb

    Computer earth leakage value (mA)

    I know every computer/equipment type will have a slighty different earth leakage stated by the manufacturer, however I was wondering what people use as a "rule of thumb" value when designing ring final circuits in offices intended to be used for computers. I was thinking 1.5mA per computer inc...
  2. Johnsty32

    I Need Work Electrician

    Hi everyone I’m looking for work opportunities I’m from Newcastle upon Tyne but don’t mind working away from home . I also have Dsb clearance to work in Norway thanks ??
    • Johnsty32
    • Thread
    • commercial electrician electrician job electrician work industrial
    • Replies: 1
    • Forum: Electricians Jobs
  3. A

    3 phase gen set neutral/earth

    Hi guys/gals I have been asked to install some 230v sockets and lights in an old refrigerated trailer, that would be used as a store on a quarry site. The trailer has a 3 phase generator built on to the side to originaly work the refrigeration unit, but as everything involved with the...
  4. H

    208V Single phase wiring from 3 phase 4 wire disconnect

    I work in a location that was once a Machine shop showroom. We have 208/230/480 etc in the building. I need to install a temperature chamber that requires single phase only 208V or 230V supply. I have a 100 amp rated disconnect literally in the exact location this needs to go. I've read for...
  5. D

    Help on Identifying a PLC and electro-magnetic commercial start/stop/retain relay system

    So for one of my tasks on my assessment I've bee asked this question: To ensure that the conveyor system is safe and complies with legislation, compare the construction and operation of an elecro-magnetic relay system with a PLC system that controls a 3-phase contactor. Include appropriate...
  6. Davisonp

    I would like an opinion on two things I am concerned about.

    Hi, I would like an opinion on two things I am concerned about. Background. ----------- I have done some work for a church that has bought a derelict farm. They demolished some of the derelict buildings and put up wood structures on the same footprint in 2012. The builders produced no...
  7. L

    Suitability of circuit accessories.

    Hi all, Hopefully this is being posted in the right place, apologies if not or if my question has been previously answered. I'm currently having a bit of a disagreement with my supervisor having carried out an inspection which is for all intents & purposes, a condition report on a living...
  8. The apprentice

    commercial kitchen (pub)

    Hi there just a quick question we have wired a commercial kitchen and work tops, extract canopy, are all metal etc the whole installation will be RCD protected but will we install supplementary bonding shall it be required ? or is it OK with the use of RCD protection thanks in advance really...
  9. N

    Standy generator control panel issues

    Control panel attached to the standby diesel generator gets frequently damage despite of earthing of the body and separate grounding of the generator.What might be the causes to damage the control panel of the generator frequently during lightning sound and light rain condition? only backup...
  10. N

    types of earthing to be carried out for 3 phase standby generator which is separately driven system

    3 phase standby generator of rating 30KVA is to be install in the lightning prone area. The utility main line is TT arrangement where neutral point is grounded with 3 phase and neutral wire provided to load system. A separately driven generator ( standby generator) is also needd with TT...
  11. James

    3 phase alternate supply

    I don't normally get involved with domestic work but this job is for a family member so I cant Simpley say no. the house is a large property with a 3 phase 100A supply. I think the earthing is TT but not 100% sure of that yet. customer has bought a 12.5Kva generator to use as a backup supply...
  12. K

    Japanese 3 Phase Wiring

    Hi, I hoping someone can assist me. I’ve taken delivery of a control box from Japan, which is powered by 3 phase at 200v. The wires are red, black, white and green. Any ideas how or if I can wire this to make work in the UK via standard 240v or 110v please?
  13. E

    380v Machine in the UK

    Hi there, I have purchased a machine from Europe. It is 380v. Our usual electrician is unsure how to install and whether we need a transformer. Can anyone help? If we do need a transformer can someone please point me in the right direction as, so far, layman's googling has failed me. Thank you...
  14. T

    UK Maintenance in a commercial building/quals?

    Hi all, I’ve just joined the forum in the hope that I can clarify the route I should take. I was self employed for many years doing domestic work. In this time I worked with electricians and gained a fair bit of knowledge and experience, I’ve also worked with gas engineers and helped with fault...
  15. T

    Air con units and it equipment on RCD?

    Hi , I usually do domestic work but i have an office job to price and i was wondering if the following items should be RCD protected, the reason i ask is for nuisance tripping. Air con units 3ph and single Sockets for the office computers Comms/Patch panel Thanks
  16. M

    Types of fuses for apartment

    Hello, I bought an apartment and i want to add new dedicated circuits and also to change the fuses panel ( very very very old one). So i was thinking to buy for main fuse a 25 - 32 A RCCB (2P), for power sockets (4 circuits) 1 x 16 A RCBO for 4 x MCB ( 1P + N ), 1 x 10 A RCBO for 2 x MCB (10 A...
  17. davesparks

    Economical DBs

    I normally only spec and fit Schneider Acti9 (aka Merlin Gerin) DBs and switchgear, but have a job coming up where the budget just isn't there for it. So what can anyone recommend as a good quality but more cost effective DB? It's a pretty simple job and only needs a single phase DB with...
  18. dokkan1080

    32amp radial

    In a school today helping an approved contractor. There is a over door fan heater on a 32amp radial fed off a rotary isolator. It then goes into a bank of 3 switches that are used to control it. The swtchs are double pole rated at 20 amps. Isn't that a danger being on a 32 amp 4mm mcb
  19. dokkan1080

    Lighting advice

    Hello, first post of many I hope Does any one have any good LED compliant panels 600x600 for use in offices and schools, they wish to share with me? TP(a) fire rated but its not a major one because of fire hoods and all that. L2A and L2B compliant, >ugr 19 and any other compliance I have...
  20. eleclio

    Would this be acceptible for emergency lighting test switches

    Hi Just made up this drawing of a way to wire and test emergency lighting and keep the non-emergency lighting lit. Has others wired it this way and would it be 18th edition compatible? I've attached the drawing

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