device

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  1. stickinsect

    Effect of someone touching a device that is protectively earthed

    I am trying to calculate (as a theoretical exercise) what the effect would be if someone touched an electrical device that is protectively earthed. I would really appreciate it if anyone could verify my workings. I am assuming that the current flowing into the enclosure of the class 1 device is...
    • stickinsect
    • Thread
    • device earth resistance earthed effect electrical theory fault current someone
    • Replies: 3
    • Forum: UK Electrical Forum
  2. Gooberstank

    RCD tripping only when high draw device and lighting ring is on.

    Hi. Wondering if anyone had any idea what might be happening. Last night I damaged a pendant light fitting by accident, not enough to stop it working. However later in the evening when my car charger started at 11:30PM the whole house RCD tripped. I only thought back to the light accident as...
  3. S

    Does a device with DC have a longer life than AC?

    Hello, Suppose we have two split Air conditioners or freeze/refrigerator compressors. First works with AC and second works with DC. Which one has a longer life? What are the pros and cons of compressor work with AC vs DC? Thank you
  4. B

    Info on device to control high DC current

    I’m looking for information to buy your build an affordable device to monitor and control 1000a DC current from an automotive battery or other sources for electroplating.
  5. SBElectrical

    Using an EU PAT testing device

    Hi all, first post here. I'm looking to buy my first PAT testing device and I've been looking at the Megger PAT400 range. I've found this used PAT410 but after looking at the images I see that the plug socket on the top is an EU one and the leads that come with it are also European. I am...
  6. timhoward

    Help please, new device to me

    This MCCB is in a distribution board in the consumer half of a substation at a school We've now tested everything downstream of this (and another 2 similar devices). My current understanding is that the maximum PSSC to operate this device a maximum of 3 times is 50% of the Icu, so 12.5kA ...
  7. newfutile

    Test the (RCD) Residual Current Device or die

    Just seen this label on a consumer unit im testing. As far am im aware no one ever pressed the test button.
  8. K

    UK Is there a device or a way which will alarm us if a water pump has stopped working?

    Sorry if this is a stupid question. We have a waste water pump in our first floor flat. The water pump failed and stopped draining water from the shower. We noticed too late and the water draining through the ceiling in to the property below. Is there a device or something we can do to know...
  9. Subpra

    Need help about Surge Protective Device

    Recently I have installed Type 2 Surge Protective Device SPD 20 to 40kA, Type1+2, Phase + Neutral + Earth (2 Pole 275 Volt AC) (Uc-275VAC, In-20KA, Imax-40KA, Up ≤ 1.5 KV) after 64A DP MCB at home MDB. The home lode is around 1.75KW. We have 220 VAC main line here. At the evening of 3rd day...
  10. 2

    Large cable protective device and enclosures

    Hi, thanks for reading this. Ive been asked to look at a job where the DNO connection (single phase 80A TT) is a long run to the final circuits. Small feeder box has been installed and the volt drop dictates 95mm cables are needed to take to another feederbox where the feeds into the building...
  11. C

    Derating a BS3871 following an EICR C2

    Hi, I’m interested to hear other views on BS3871 MCBs being changed following a C2 non compliance on an EICR for over rated protective device. Eg. A 2.5mm radial circuit protected by a 32A device and then swapping the BS3871 for another BS 3871 but a 20A device.
  12. therealnwc

    Issue with pairing MainsSwitch RF device

    Hi, Bought a MainsSwitch device to run the RF pairing link to switch some low voltage LED strip lighting under my Breakfast bar. No direct switch link option where I need it and I’ve installed the transmitter & receiver kit. It starts off for the first 30-60 mins working then it loses the...
  13. newfutile

    Kewtech kt1700 single pole voltage detector device

    Has anyone used one of these KT1700 - Kewtech - https://www.kewtechcorp.com/products/kt1700/ and are they approved in place of the usual 2 pole testers?
  14. punkin

    Surge Protection Device on old installations

    Hi I always thought installations were safe at the time of instalment etc, the Distribution Boards at my works were installed over ten years back. Our company just had its EICR done. The tester gave us a C2 for a number of DB’s which don’t have Surge Protection Device installed, these DBs with...
  15. OnlQQker

    Arc Fault Detection Device!

    These are going to become the norm aren't they? I've been reading this https://electrical.------.org/courses-resources-career/free-resources/consumer-guidance/arc-fault-detection-devices/ I was fixing the 21v motor on the Dyson this morning, and as usual my mind decides to wander. For years...
  16. newfutile

    Surge protection device failure mode

    I have come across a failed SPD, I thought I would take it apart and post pics for people to discuss. It appears to work by melting an alloy or type of solder to break the connection. I guess this is after the MOV decreases its resistance and increases the current.
  17. events-guy2020

    Portable device safety test question

    I have built a portable lighting game, and need advice on what safety testing would be needed for it to be used legally by private clients. In effect it is an enclosure with 10 sockets (only 5 connected, to 5 separate bulbs, connected to a switch), and 20 tails (only 5 connected to power). The...
  18. T

    Device randomly trips ARC Fault Breaker

    if my brand new fridge is connected to a circuit with an ARC Fault breaker, and if the circuit has ONLY ONE OUTLET on it (the one to which the fridge is connected), then what are the most likely causes of RANDOM arc fault trips. It'll stay on for a week...then all of a sudden...it'll trip (even...
  19. C

    Manual for humidity device ventaxia

    Does anyone have experience with that humidity device. It is very old. Would like to find manual for it to make sure it is working properly
  20. RF Solutions Ltd

    Wireless Switching from Anywhere via a Smart Device app

    Wireless Switching from Anywhere via a Smart device app In addition to handheld remotes, would your end customer benefit from wireless switching devices via a Smartphone app? Introducing the NEW RIoT Receiver: A 4 Channel wireless control receiver Switches outdoor lights, door/gate motors...
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