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wiring

Electrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, sockets, and light fittings in a structure.
Wiring is subject to safety standards for design and installation. Allowable wire and cable types and sizes are specified according to the circuit operating voltage and electric current capability, with further restrictions on the environmental conditions, such as ambient temperature range, moisture levels, and exposure to sunlight and chemicals.
Associated circuit protection, control and distribution devices within a building's wiring system are subject to voltage, current and functional specification. Wiring safety codes vary by locality, country or region. The International Electrotechnical Commission (IEC) is attempting to harmonise wiring standards amongst member countries, but significant variations in design and installation requirements still exist.

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  1. Savva

    No power to the wiring centre!

    I went to a job (y-plan system) where all the stats, motorised valve & the 2 channel prog were dead. The wiring centre was dead too but the spur (where the wiring centre took its perm live) was live giving 235v. I had to leave without fixing it. Anyone had this before? Any advice on what I could...
  2. Stanios

    Underfloor Manifold Wiring

    Hi all, Going on a day trip to Essex tomorrow to look at underfloor heating that wont turn off, me living 80 miles away and not knowing much about underfloor wiring the customer still persisted so hopefully he will be paying for a fix rather than the diesel. I want to check wiring and manifold...
  3. Savva

    Any Croydon based engineers out there?

    Hi all I'm looking for someone based in Croydon who can fault find y/s plan wiring: short circuits, valve heads, stats & programmer. Anyone out there? Cheers.
  4. F

    wiring a nest heat link to a heatrae sadia electromax

    In the instructions it says that the requirement for the room stat is a 2 core but obviously the heat link requires a three core, live neutral and switch live. Is it even compatible? Thanks
  5. F

    Procombi CT25 Boiler Complete exploded parts diagram including wiring diagrams

    Hello I need a detailed exploded parts and wiring diagrams for the Procombi CT25 Boiler. Is there a site which I can download from ? I have tried phoning the manufacturers technical dept but I get no answer. Pease advise. Regards FLYNNE
  6. J

    Vaillant ecotec 418 wiring

    Hi lads. Having some issues with the wiring of the above boiler. I've run a new live neutral earth to the boiler from the fused spur via the wiring centre. I always thought the pump was switched with the orange on the 3 port. Now the pump live is seperate do I run the pump direct to boilers pump...
  7. B

    Wiring

    Just can't get my head into gear tonight. Looking at upgrading an old open vent system. Thought about fitting system boiler and an unvented cylinder. But use a heat exchanger fir existing heating system. It would be wired as s plan but second pump on secondary side for heating would get feed...
  8. U

    Wiring a gold hot water circulating pump

    How do you wire a hot water circulating pump? Does it run on a permanent live?
  9. A

    Wiring for dual circuit and pump overun?

    Hi all. First post - be gentle. I have added major extension to existing house. There are two pumps each supplying a separate CH and HW zone valves. The boiler is a Worchester CDi conventional. The boiler has an overun circuit that keeps the pumps runing for 3 min after the Heating demand...
  10. S

    Help with wiring at Salus IT500 thermostat

    Hi Folks, I'm a Diyer so trying my hand at installing a new salus it500 thermostat on my current system Current system My current oil burner system is 1 zone only which heats all radiators and water together, at the boiler end I have 1 black wire and a earth going into a double switch, one for...
  11. P

    Problems with central heating

    Bit of a long story this one not ideal for xmas eve / morning. I have a gas central heating system with a boiler behind the fire downstairs. The hot water tank which was ancient was leaking so my mate who is a plumber replaced the tank. A few days later this started leaking. And some of the...
  12. biker-plumber

    Wiring Hive reciever to a Vaillant combi

    Does any one have a wiring diagram for the Hive reciever to a ecotec pro? It's single channel as it's heating only. Thanks
  13. P

    Mid-position Valve Wiring

    Hi All, I've searched the forum for an answer to this without luck so here goes . . . I've just replaced a Vitodens 100 system boiler with a Baxi Megaflow system boiler which is connected to an existing unvented cylinder. I've had to fit a new 3 port valve but I'm hoping to keep the existing...
  14. H

    THREE Thermoststs

    Hi there. I had a Aquagold Unvented 250 lit Thermal Store Cylinder fitted a while ago. I also have the oil fire boiler connected. Also I have a 16" back boiler, hence the 3 thermostats! I had the fire blazing yesterday & the oil fire heating was switched OFF. But for some reason the oil fire...
  15. M

    Jg guest ufh wiring centre

    I installed the jguh1 underfloor heating system wired up the wiring centre ,does any body no if the boiler enable should have any volts passing through it when heat called for ,i linked up the unused zone vale 1 and 2 as per instructions i tested it and nothing there between termanils and...
  16. H

    honeywell sundial wiring center permanently on.

    Hello Im after some help with a honeywell sundial wiring center. The boiler and pump are permanently on. The cylinder stat was wired incorrectly by the home owner with the common and 2 wires the wrong way round. Having corrected that I am getting 170 volts down the common and 1 wire of the...
  17. U

    Thermostat wiring questions

    Hello, If a previous thermostat has been removed from a wall fixing and been made safe and plastered over, can it be dug out and reconnected? Thanks, Tom
  18. G

    Honeywell 3 port powerhead wiring V4073A

    Hello. Anyone really good on Honeywell 3 ports? Should there be continuity on any of these combinations of wires when removed from wiring centre; Orange & grey White & grey Orange & white? Cheers ;-]
  19. D

    Wiring an S-Plan onto a Combi

    I've just had to condemn an old 145L Andrews unvented water heater in a hair salon, and I am going back to fit an indirect unvented cylinder. They have a Worcester 230 combi in there at the minute which runs the heating and hot water for the kitchen sink. I'm planning on leaving the kitchen...
  20. R

    Issues with British Gas UP2 controller - advice needed please

    Hello all I am hoping someone might be able to offer me some advice regarding my faulty UP2 central heating controller. I am quite disappointed, as it is a new replacement CH installation (apart from rads) purchased from and installed by British Gas just 3 years ago. However, despite my...
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