circuit

A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by an overcurrent or short circuit. Its basic function is to interrupt current flow to protect equipment and to prevent the risk of fire. Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation.
Circuit breakers are made in varying sizes, from small devices that protect low-current circuits or individual household appliances, to large switchgear designed to protect high voltage circuits feeding an entire city. The generic function of a circuit breaker, or fuse, as an automatic means of removing power from a faulty system, is often abbreviated as OCPD (Over Current Protection Device).

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  1. B

    Central heating circuit won't circulate after replacing radiator

    Hi - I'm a new poster and have just stumbled upon this very useful forum. I would be very grateful for any advice. I have a Eurocombi Ariston boiler that's about 10 years old. It operates without a thermostat on a simple on/off control within the boiler itself. There are five radiators...
    • branchlake
    • Thread
    • after boiler central central heating system circuit radiator replacing valve water won't
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  2. T

    Dunsley Yorkshire air sucked in

    Hi great forum We have read many times for help along the process of renovating our home. We are hoping someone can offer us some advice on our plumbing problem. we have a Yorkshire boiler stove. It is on the ground floor at the back of the house and is fed from and f/e tank in the loft (5.3m...
  3. Worcester

    Towel Rails on the DHW primary circuit

    I've just received a tender document for a major refurb and the architects specification calls for the towel rails to be installed on the DHW cylinder primaries. (Fully pumped, unvented heating system) This used to be common practice a few years back, - I can't find any reference to whether it...
  4. jaydebruyne

    Immersion Heater Electric Circuit

    My boss has sent me on a job today to fit a fused spur for an immersion. I said it needs its own circuit. He said no it doesn't as its only 3Kw. Is this true? I'm sure the regs are that if a water heater is in a tank of more than 15 litres it needs a separate circuit.
  5. W

    Rusting rad on hot water circuit

    Woman has a rad that's rusting in the bathroom. It gets hot with the hot water. It's been ages since I read about this on here and I can't remember but I have a feeling it needs to be a special type of rad? Just looks like standard CH rad. Advises, if'n you please.
  6. M

    5 channel time clock

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  7. S

    Ecodan query

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  8. L

    Typical radiator circuit

    Hi can,t seem to work this out, as usual.:sorcerer: I have two diagrams of radiator circuits. Diagram one shows the flow,too each rad on the left off the rad, and the return is the last rad on the right side. But diagram two shows a flow too each rad on the left again, too each rad, but this...
  9. M

    potterton programmer ep1 not working since lighting circuit blew

    hi all had a short on my lighting circuit at home and now my programmer is not working or showing any display any ideas.Don t understand why as it should not coming off the lighting circuit.
    • mooey
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    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  10. M

    baxi 80e circuit board fuse

    I have the above which was fitted with a 13 amp fuse, which melted the diverter motor wire and blew the fuse on the pcb. Do they have a spare fuse on them or shall I just get a new pcb for it
  11. R

    6.6kw multi fuel stove with boiler

    Hello, I have a small multi fuel stove with a back boiler I am in the process of plumbing up. The main piper work is in which takes me from the fireplace directly upstairs vertically to the cupboard with the thermal store in it. Our oil boiler heats the rads and thermal store all on one...
  12. D

    How to find out if a Potterton Suprima 70L can be used on a pressurised circuit ?

    Customer has a Potterton Suprima 70L and wants to instal a megaflow to boost hot water pressure. How do i find out if this boiler can be used with an unvented cylinder & also would the heating circuit have to be pressurised as well with a megaflow rather than vented and pumped as it is now ...
    • DomC
    • Thread
    • boiler central heating system circuit cylinder find potterton potterton suprima pressurised suprima unvented
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  13. L

    Air in hot water circuit.

    Hey, i have a indirect hot water circuit from the back boiler, i have air in the system. There is no air vent fitted at the cylinder.. Is there a easy way to get the air out of the system?
  14. S

    Rad problem.

    Hello, Just a quick question. I have tee'd into a 10mm flow and return and took a new rad off this circuit. When the system is running the flow is bouncing hot to the valve, the top half of the rad is luke warm and the bottom half cold. Flow and return are the correct way round, both bi...
  15. Z

    Underfloor heating query. Can I split a circuit?

    Hi all, I am installing a wet underfloor heating in the upstairs of my home that I intend to use as an apartment for the next few years. I do not want to run the heating under a kitchen island but further down the line the plan is to remove the kitchen and island. Can I run a separate circuit...
    • zaqzaq
    • Thread
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    • Replies: 8
    • Forum: Plumbing Jobs | The Job-board
  16. B

    Aqualisa Aquastream Mk 1 , help with Printed Circuit component

    Hello, Can anybody help me identify TR1 (looks like a 3 legged can) next to the Relay on the PCB. Mine has a broken lead and no longer runs. Aqualisa offer no help with such an old product but that's all it is wrong as far as I can see. I'm an electronics engineer, there are many possilbe...
  17. K

    Underfloor heating only 1 circuit out of 5 is working can anyone help urgently

    Water Underfloor heating only 1 circuit out of 5 is working can anyone help urgently, originally out of 5, 4 circuits were working, then we called polygen as the insurance company suspected that there was a leak as the boiler was loosing pressure, but no leak, but after polygen investigated and...
    • kelly
    • Thread
    • anyone boiler central heating system circuit help ufh under floor heating underfloor underfloor heating working
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  18. C

    air trapped in boiler circuit (SOLVED)

    referring to this thread: http://www.ukplumbersforums.co.uk/plumbing-forum/71305-air-trapped-boiler-circuit.html after pulling hair out with the plumber, not wanting to sort this, I started looking at the boiler manual and noticed the gravity and pump connections to the boiler cross on the...
  19. C

    air trapped in boiler circuit

    ive just had a plumber fit a RM stelflow cylinder, move the pump to the tank cupboard upstairs, and fit a S plan. the trouble is when the system is running there is a loud tinkling noise where the boiler is, and the boiler seems to kettle somewhat. im guessing when the altered the system from...
  20. A

    Bathroom rads on hot water circuit (conventional system)

    I'm getting conflicting advice so I thought i'd try on here for a bit more information. All our half landing bathroom rads are on the hot water circuit - some plumbers say they must come off the circuit and go on the heating circuit, others say they can stay. Which is right? Background &...
    • Arch Panda
    • Thread
    • bathroom circuit cold radiator hot hot rads hot water system water
    • Replies: 9
    • Forum: Plumbing Jobs | The Job-board

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