mains


Subscribe to ElectriciansForums.net to remove all ads and show your support!
Mains electricity (as it is known in the UK and some parts of Canada; US terms include grid power, wall power, and domestic power; in much of Canada it is known as hydro) is the general-purpose alternating-current (AC) electric power supply. It is the form of electrical power that is delivered to homes and businesses, and it is the form of electrical power that consumers use when they plug domestic appliances, televisions and electric lamps into wall outlets.
The two principal properties of the electric power supply, voltage and frequency, differ between regions. A voltage of (nominally) 230 V and a frequency of 50 Hz is used in Europe, most of Africa, most of Asia, much of South America and Australia. In North America, the most common combination is 120 V and a frequency of 60 Hz. Other voltages exist, and some countries may have, for example, 230 V but 60 Hz. This is a concern to travellers, since portable appliances designed for one voltage and frequency combination may not operate with, or may even be destroyed by another. The use of different and incompatible plugs and sockets in different regions and countries provides some protection from accidental use of appliances with incompatible voltage and frequency requirements.

View More On Wikipedia.org
  1. Sparky10

    Radials V Ring mains

    Hi all, This may be a common topic and may already have been spoken about 100s of times so forgive me in advance. I have always wired in ring mains for my sockets up until recently.. I came across an install where all sockets were wired in 2.5 radials protected by 20A RCBO they had wired 3...
  2. V

    Landlords EICR and t&e sub mains without RCD

    Hi All Been doing a lot of EICR for landlords recently due to new legislation and agents i guess. One common issue im finding even with relatively new (10 years) old installations is a T&E sub main. Now some of these have a 100mA rcd .. or no RCD .. some are even wired in concentric cable...
  3. B

    Non standard mains plug on washing machine

    Anyone seen a non-standard mains plug like this on a standard domestic washing machine? Why would you do it? Any reason not to replace with a standard 13A plug?
  4. B

    PME exported from mains

    Hi All Just finished an EICR on a big 7 bed property. The incoming supply is PME. They have got the incoming head located approx 30m away from the Consumer Units. There is a Henley block in the mains and a previous contractor has ran a split concentric to a solid link fuse and then done another...
  5. M

    Commercial 6 core flex mains and low voltage

    CP electricians supply a 6 core cable from their lighting control boxes that supplies a mains voltage emergency light,, 2 cores of this are 18v dimmable switching. A led lighting company have provided the led lights and drivers that connects to the 6 core flex however their emergency pack and...
  6. S

    Mains cable from supply to consumer unit

    Hi, have a metre box 4m away from consumer unit, there is going to be an extension on the side adding an extra 4m so the metre box is getting moved to end of house again. Total length will b 10-12m, at the min the 25mm tails are going from mains to fuse switch with an 25mm 3core swa supplying...
  7. M

    Problem with mains outside light, any help please?

    Hello! I've put up a mains outside light, Been working fine for about 2 weeks, Now it's not working! When I turn it on and off at the mains, the bulb flashes once like a camera, and doesn't light up. I've checked all wiring connections in the light and the plug, Everything is connected. Left it...
  8. T

    Converting Tube Heater Socket into Mains Socket

    We have a working tube heater in a cupboard which we do not use. We would like to put a tumble dryer in the cupboard but there is no mains socket, as the tube heater is wired directly into mains, and controlled by a fused switch on the wall. Is it okay to simply swap the tube heater...
  9. B

    Mains wired smoke / heat / CO detector question

    Hi Guys We're having work done to insert an open plan kitchen-diner and snug seating area plus wood burner into already existing extension. One load bearing wall is being knocked through. Electrician just bumped his quote up by £820 to cover replacing this consumer unit and moving it up the...
  10. jackhammerJIM

    Commercial sub mains exceed max zs of mccbs

    Thoughts required on todays scenario . Commercial premises fed from 100 amp 3 phase TNS supply ZE 0.40 feeds 80 amp 3 phase switch fuse (max zs 0.57) feeds 400 amp mainswitch protek panel in 35mm swa 16mm earth 125 amp mccb (0.24 max zs) submain exceeds max zs at 0.57 Had this down as a...
  11. K

    Remote mains switching/control options?

    Hello there, I have a property located in a very rural area that's only partly occupied, its also rented out for short periods. I live 2 hours drive from the property and the issue I have is that people keep leaving electrical items switched on which of course poses a huge fire risk. It can be...
  12. T

    30 Amps DP mains supply concern

    Note: I am not an electrician. I have a large house that has been divided into 4 flats with an additional landlord supply, so 5 meters in total (2 smart meters, 3 dump meters). I recently noticed that there was damage to one of the supply side fuses. I called UK Power Networks who came and...
  13. L

    Domestic To connect old turntable to mains earth or not?

    Hi Guys, I am renovating an old vinyl turntable (Thorens TD-150 mkII is anyone cares) It is fitted with a 2-core mains cable, but there are lots of metal parts including sub-chassis and a 240v motor! Normally this is all earthed via the amplifier (phono leads), but I have swapped the 2-core for...
  14. J

    Mains cable blown out on two products

    Hello, Could anyone please identify what has caused this kind of blow-out on a 3-core flex? One is from an electric blanket and one from a heated pillow type thing. I think both cables are the same though, probably the same factory. The 500mA fast-blow fuses inside the controllers and the 3A...
  15. adamfromayr

    Powder coat oven keeps tripping mains rcd all off a sudden?

    Hi Okay my powder coat oven i built was fine until today! I had it working kept on for more than an hour etc Pretty pleased with it all 2 x 2000w elements fitted and then wired into a 32a blue socket to the 42a isolator switch But today its started tripping i looked insid emy control panel...
  16. R

    Gas cooker - mains lead for ignition and clock

    I have just replaced my electric cooker for gas and now have the lead for the ignition and clock training along the worktop to the cooker isolater on the wall. I am capable of doing the following, but would like confirmation. I cannot just cut off the plug and wire directly into the dedicated...
  17. A

    Residual Current on Mains Tails - Installation Disconnected.

    I bought a new MFT1710 a couple of weeks ago and got a free clamp meter with it. (UNI-T UT210B, 200A Mini Clamp Meter). I finally got it out the box today and thought I'd try it on my mains tails to see if/how it's working. Surprisingly, with the consumer unit main-switch off, and the main...
  18. C

    Large 1940s mains upgrade

    upgrade to a 1940s ish installation mains busbar due to soldered joints failing on busbar isolator, 20 ish switched fuses of the same age on it. Large installation(hotel) that never closes and has alot of c1s on existing out of date certs but they want the mains upgrading 1st before the rest of...
  19. OttoF

    Domestic How to tell if mains sockets are on same circuit?

    Is there a safe and easy (but also precise) way to tell if two separate mains sockets are on the same circuit? I need to know because I'm trying to use existing mains circuitry to create an ethernet network in a communal area of a multistorey block of flats, using Powerline Adapters...
  20. J

    RS Solutions Mainslink 500m wireless mains to mains discount code

    Hi Guys, New to the forum, so first post. I need to purchase one of these Mainslink 500 m wireless jobies as communications cable between boiler and central heating has been cut and instead of re-running the cable, this seems to do the job. Has anyone used one of these Mainslink wireless...
Top