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device

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  1. rdsn

    Start second device when first device starts working

    I'd would like to know if/how to turn on a second device (220V fan) when another device starts working automatically (air compressor). The idea is to have both always plugged to the electricity, but the fan working only when the air compressor kicks in. Could someone guide me how to do it...
  2. E

    DIY electrical device-im going to use this device the same way as shown in the video

    Hello.How can i make this device as shown in this video?What DIY tools do i need?The device is shown in this youtube video:
  3. R

    Isolator versus protection device on main incomer

    Hi, i'm only a student so please forgive me for the basic question: Say you have a generator or power transformer serving a main mccb panel, why can't the main switch of the panel be just an isolator? I've only seen the main switching device as a mccb or acb. I know that in a house you'll have a...
  4. haptism

    Which Protective device on MWC

    Hi hope someone can help, i need to record the protective device on a MWC and not sure which to enter. I have removed an old bathroom heater on a 20A radial and rerouted cabling to feed an RCD FCU, the load side of which feeds into the bathroom serving towel rail with a local DP (20A) switch...
  5. G

    Surge Protection Device question

    I am busy doing some work with a local contractor to get some up to date hands on experience. whilst doing a EICR today i come across a CU with SPD in. The property is a recently built 5th floor flat about to be let on a new tenancy and meets the criteria for requiring a SPD. The whole set up is...
  6. D

    EMI/RFI Noise filter

    Noise filter will be in between wall 240V and device. If the device is rated at 10AMPS then what AMP noise filter is required? Is it 20% above device rating? regards.
  7. A

    Electrical OM software

    Has anyone else used this software? Seems pretty good tbf but seem to be unable to spec rcds amd rcbos... Am I going wrong somewhere?
  8. Pat H

    Cable size less than protective device rating

    Noted today an interesting comment on page 43 of christopher kitchers Practical guide to inspection, testing and certification of Electrical Installations ( a great book ) Under Shower curcuits he states: For this type of circuit it is possible to have a cable which has a current rating of less...
  9. Rocboni

    Max Zs

    Hello, Having a bit of difficulty completing the below assignment, wondered if anyone can expand on this? Explain in detail the relationship between the Protective Device and the Earth Fault Loop Impedance, Maximum Zs for the protective device and how this is calculated, Maximum disconnection...
  10. T

    Individual RCBO

    Hi I need to check what the electrical requirements (17th addition and Part P) are for RCBO's on a new kitchen extension. Using the existing house Consumer Unit with one 100Amp 30ma RCBO. Do all the different new kitchen circuits i.e Ring Main, Cookers (x2), Indiuction Hob, Lighting...
  11. S

    Kitchen ceiling light - maximum lumens?

    My 88 year old mum needs new lighting in her very small open plan kitchen. They've just built a house next to hers and the daylight is much diminished in her kitchen and adjoining dining table area. Can anyone recommend a good bright diffuse light for her kitchen ceiling? Would this light be a...
  12. J

    Device X Blows Device Y Fuse

    This evening I realised my subwoofer wasn't working and after a little investigation discovered it's internal and power cable fuses had blown. After replacing them I turned it on and off, all seemed OK. I then plugged in the phono signal cable and turned it on and instantly the fuses popped...
  13. E

    New High-temperature Device Captures A Broader Solar Wavelength Spectrum

    Using a heat-resistant device, made of tungsten and alumina layers, researchers have found that the device can absorb the sun's broad spectrum radiation and convert it to electricity. Broadband solar absorption previously has been achieved using metal-insulator-metal (or MIM) resonators, which...
  14. E

    New System Can Identify How Much Power Is Being Used By Each Device In A Household

    If you want to save on your monthly electric bill and reduce your greenhouse gas emissions at the same time, you might buy a new, energy-efficient refrigerator. Or water heater. Or clothes dryer. But if you can only replace one of these, which will give you the biggest payback? You could try to...
  15. juice

    is it up to the customer what protective device is in his installation?

    I've been asked to install a shower unit in a clients house and he only wants me to change the shower itself. The consumer unit has BS3036 rewireable fuses and no RCD protecting any of the circuits, including the existing shower circuit. He has already bought the new shower and only wants me to...
  16. A

    Surge Protection Device

    Can anyone tell me if its a requirement to install a surge protection device to a sub Distribution Board if it serves external equipment ie a roof mounted extract fan even though a SPD is located on the Main Panel? Sent from my iPhone using Tapatalk
  17. G

    Sockets with integrated USB connections

    Hi I am new to the forum and finishing of my training with a 3 month placement starting next week, as i am hesitant to go straight out and work alone, i figure to do a good job takes more than a bit of theory and a freshly printed City and Guilds! I am not sure if this is the correct forum to...
  18. H

    Time Delayed RCDs

    If anyone has time to explain how time-delayed RCDs function, or point me to an article that explains it I'd be very grateful. I understand the principles behind a standard RCD, just very curious how that same design can then incorporate a time-delay. Many thanks,
  19. Lee Gold

    Rcd / rccb - mcb

    However many tripping devices and breakers. I cannot, how ever many times I read what they are and how they work and what there differences are, I still don't get it. Can someone explain in short terms what is the difference between rcd/ RCCB, MCB and whatever else please, I seriously don't...
  20. T

    Class I device with unearthed metal

    Evening all; I have just completed the C&G 2377 PAT test exam and now getting to grips with testing in the real world. The IET code of practice shows that class I devices can have unearthed metal parts so in the case of our clothes iron how do I tell if there's no earth continuity because it has...

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