Search the forum,

electrical

Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others.
The presence of an electric charge, which can be either positive or negative, produces an electric field. The movement of electric charges is an electric current and produces a magnetic field.
When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb's law. If the charge moves, the electric field would be doing work on the electric charge. Thus we can speak of electric potential at a certain point in space, which is equal to the work done by an external agent in carrying a unit of positive charge from an arbitrarily chosen reference point to that point without any acceleration and is typically measured in volts.
Electricity is at the heart of many modern technologies, being used for:

Electric power where electric current is used to energise equipment;
Electronics which deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies.Electrical phenomena have been studied since antiquity, though progress in theoretical understanding remained slow until the seventeenth and eighteenth centuries. The theory of electromagnetism was developed in the 19th century, and by the end of that century electricity was being put to industrial and residential use by electrical engineers. The rapid expansion in electrical technology at this time transformed industry and society, becoming a driving force for the Second Industrial Revolution. Electricity's extraordinary versatility means it can be put to an almost limitless set of applications which include transport, heating, lighting, communications, and computation. Electrical power is now the backbone of modern industrial society.

View More On Wikipedia.org
  1. D

    Circulation pump with electrical speed switching for wood boiler stove

    Can anyone help, please? I'm looking for a heating system circulation pump for a domestic install, with 3 speeds, where the speed can be toggled electrically as well as via a push switch on the pump body. I'm using this pump with a wood boiler stove, where I want to run the pump at its slowest...
  2. N

    Should I switch to Infrared radiators or install TRVS?

    Hi! We're looking for a consult for our 1905 built (renovated in 2010) victorian house for the future of our heating system. The house is 2 floors and runs 2 different systems and hot water. On the ground floor we have water based underfloor heating with a mix of tile and wood floors with...
  3. F

    Hot water decreases flow after 5 minutes (electrical)

    I had a new electrical water heater (Rheem) installed in our apartment - before it was inside the closet, but now we installed in the basement of the building. Due to the new layout, the main hot line is connected to a different point, near the laundry shut off. The old heater tank connection is...
  4. M

    Electrical fault finding?

    Hi guys. I’m still very new to boiler fault finding but was wondering whether you could advise me on a particular multimeter or tester that would help with fault finding? The wife has been a good one and got me a Martindale ET5 open jaw tester but I’m unsure whether they’re any good? I can’t...
  5. B

    Electrical meters in Unit block - With new Plumbing

    hello - I am curious if there is a plumbing standard or electrical standard that applies. Situation is unit block, old 50's apartment - 10+ electrical meters in wire cage together. Someone has put forward a bylaw change that will allow them to run kitchen piping in body corporate areas that will...
  6. plumbingdoctor

    The Plumbing and Electrical Doctor

    plumbingdoctor submitted a business listing in the plumbers directory: The Plumbing and Electrical Doctor - For A Healthy Plumbing and Electrical Checkout this business listing... - Please leave a review for this company if you have used them before. You can add your own plumbing business to...
  7. MrGatch

    Burning Smell and Flames on Electrical Immersion

    I have a smell of burning from the immersion on hot water cylinder. The overheat pin had popped out, but when I popped it back in and switched on there were tiny smouldering flames around one of the contacts where the thermostat connects to the immersion. Separately I've replaced the timer as...
  8. gmartine

    Electrical trunking/conduit brackets?

    Having a brain fade, I had a boxful and now I can't find them anywhere. Seen, bought or used these.? Used for extra trunking support, no not my pants.
  9. F

    Downstairs underfloor heating is dead due to electrical problem

    Hello all, I'm hoping someone can advice me on my heating problem - I seem to have lost all downstairs UFH, but the upstairs heating and hot water are fine. About our system: We have a gas boiler feeding an 5 zone UFH system downstairs, some radiators upstairs and the hot water cylinder. This...
  10. eagleeye

    Additional electrical socket for boiler in loft

    Can anyone tell me if its actually a reg or just good practice that a switched socket outlet (as well as a switched spur) MUST be fitted next to boilers in lofts so when service engineer visits there is somewhere to plug in equipment should he need it ? I have always done it but wasnt sure if...
  11. Dan

    Plumbing, Tiling and Electrical Websites We Know

    Continue reading...
  12. C

    Electrics under the bath

    Hi, I’ve just taken off the side of the bath with the aim of fitting an overhead shower to the bath, and have found an electrical unit under the bath, which appears to be for the central heating system. It’s fixed to the floor, so it’s not raised, and the fact that a small ingress of water has...
  13. C

    230 volt central heating box under bath

    Hi, I’ve just taken off the side of the bath with the aim of fitting an overhead shower to the bath, and have found an electrical unit under the bath, which appears to be for the central heating system. It’s fixed to the floor, so it’s not raised, and the fact that a small ingress of water has...
  14. Bbarclays

    Electrical regulations to connect gas boiler

    Hi there Recently new boiler was installed by reputable company. Old boiler was removed, new Boiler was relocated to loft, wired from Y junction box to another junction box away five metres from boiler. Inside junction box just six wires- three in and three out. Live, earth and neutral. Then...
  15. T

    Effect of electrical work on wireless thermostat signal

    I have WB combi boiler controlled by a Danfoss wall-mounted wireless thermostat. I recently had some electrical work done as follows: 1. New mains distribution board in hallway 2. New cable from distribution board to double oven in kitchen 3. New isolation switches to bathroom extractor fan...
  16. A

    jumpers electrical ground or what?

    ok is it electrical ground or dielectic. I will remove then replace when done, should I shut off electrical breakers or is it necessary? Should I place it in a different spot or can I remove it for 3 hours or so then replace?
  17. OffshoreGas

    Electrical qualifications

    Most electrical work required for plumbing/heating does not seem to be notifiable under building regulations. What electrical qualifications do most have for basic electrical work such as installing/fault finding heating controls or adding a fused spur for a boiler.
  18. ShaunCorbs

    burrows electrical transformers

    any ones use one / got one thoughts on it bad good? https://burrowselectrical.com/portable-electrical-transformers.asp
  19. Inverness

    Electrical connection grants system external 26/35

    hi guys, I've removed a internal oil boiler that has a fused spur pump and a fused spur power to boiler. If it's not striaght forward I'll get a sparky. But if it is I'll do it with the help of you guys.
  20. CorgiDirect

    Testo electrical measuring instruments. The new generation

    VIEW FULL TESTO RANGE HERE
Creating content since 2001. Untold Media.

OFFICIAL SPONSORS

OFFICIAL SPONSORS

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock