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  1. S

    Shower pump power work/alterations

    Afternoon to all! I have to replace my current shower pump as it's on the way out, it's loud at the best of times so I have taken the opportunity to replace with a quieter unit but my problem is it's a different make and as a result the power supply is also different, the new pump comes with a...
  2. S

    Power supply to 380V pumps from 460V panel

    Dear all, We have 460V MCC panel for existing pumps in our plant. We need to give supply to new 380V rated pumps in the same panel. There is space available in the panels(Out of 9, one panel almost free). So please suggest is it possible to make the arrangement for MCC feeders in the same...
  3. W

    Air Source Heat Pumps

    Hi, I install a few heat pumps in a domestic situation from time to time. I have recently started renovating an old 1800s cottage which has no access to mains gas which made me think about putting in an air source heat pump. I was looking at an ecoDan as I've been told they are best on the...
  4. R

    Panel problem

    Hi guys, after your thoughts on a problem i have on a panel at a sand quarry feeding the main sand pumps and de-watering screens. The panels main isolator is tripping at random times, it can run for an hour with no problems then it will blow. There are 2 rcd's feeding the pumps and neither of...
  5. T

    EU's doing away with 3phase Pumps and motors

    This is starting to get right on my !! Now. Needed a few pumps in the last few months, which wasn't the easiest of jobs getting like for like. But now I can't get them or any for that. All the pump and motor manufacturers are only supplying single phase motors wdf. Some --- in the EU/ G12 or...
  6. G

    gajimafeet

    I would like to learn as much as i can. I have a background in Pumps and worked for KSB Pumps for 8 years in sales. I am now in sales and come across a lot of variable speed drives in Industry. I studied electronics and Electrical but could not get an apprenticeship in south Africa. I am always...
  7. I

    Heat Pumps & Building Regs - New Build

    Hi guys, Does anybody know what the rules are concerning new builds and heating systems. Currently going through planning application for a new build and I have heard that gas central heating systems are no longer allowed by a guy from the council and that we need to have a heat pump system...
  8. Dan

    Who Are Our Resident Green Energy / Solar Experts?

    Just wondering who our resident solar experts are.
  9. L

    Domestic Sewage Pump!

    Evening All I have a domestic sewage pump to connect up later on this week. Its a 3 float system(stop, Start,Assist) and has two pumps. The pumps are only supposed to run one at a time in sequence to lengthen their lifespan. They will run together if the assist float comes in to play. Its a...
  10. astormatt

    Pumps and Relays

    Hi all I am working on a job and I am having trouble getting my head around it. Normal systems are fine but this is causing me a headache. It is an S plan with an additional pump so both the DHW and CH have a pump and a valve, I know that the pumps have to be split due to it back feeding but...
  11. P

    Multiple Pumps on Heating Systems

    Hi all, Up until now I have mainly been dealing with bog standard Y and S plan heating systems with single pumps albeit sometimes adding smart control systems etc but in the last week I have come across a couple of installations where there are multiple valves and pumps in the system and I am...
  12. andyb

    VFD Volt Drop Question

    I need a help from those on here with experience with 3 phase motors and VFDs. I have been asked to install the cable to supply a couple of pumps that will be controlled using a variable frequency drive. As they are submersible pumps they come pre wired with 12 core 2.5 rubber cable, 10 cores...
  13. E

    Heating system wiring

    Im just in the process of installing a large heating / hot water system in a restaurant / bar and need some advice on selection of gear for wiring it. I would really like to have everything going back to a main "din rail" enclosure. I need to install relays in the system as I have 6 motorised...
  14. J

    Boiler wiring - Danesmoor + 2 external pumps

    Hi all, I currently have the following system; 1 x worcester danesmoor 15/19 boiler with internal programmable timer, a cylinder and room stat control all built into it. There are 2 external danfoss pumps one for HW and one for CH. I have been lucky to get a reasonably priced worcester...
  15. S

    Demand of Solar Irrigation Pump is increasing in Bangladesh

    Irrigation is one of the major part of Bangladesh economy. In most of the area Farmers don’t have the access to grid electricity for well pump so demand of solar powered well pump is increasing. Currently, there are almost 1.61 million irrigation pumps running in the country, of which 1.34...
  16. W

    Two Pumps in the Desert

    Hello , I have two pumps , which I want only one to be ON at any given time. The pumps are triggered by several event , i.e. tank empty , irrigation pressure (manual open one of the valves) , irrigation controller.. etc. I am thinking of using two ON delay timers with say 2 min. on...
  17. uksparks

    Pumps and motors

    Hi, Ive got a good opportunity to do regular work for someone, well, a few times a month, connecting new pumps and motors, three phase stuff etc. Its a new area for me and looking for some pointers and basic information on where to start really, is there any good books or literature anywhere...
  18. driverman

    Air heat source pumps

    Hi Guys, soon be wiring for an air heat source pump which is to be sited outside a detached double garage with a studio flat above. I need to determine the overall load that will be required to determine size of sub main to be installed. At this point in time I've no info from the owner about...
  19. telectrix

    To RCD or NOT?

    A scenario for trainees to consider. Sub P.O. requirement is for 6 x double unswitched socket outlets fitted to the underside of the counter for tills, card reader and other IT/ electronic equipment. wiring will be surface in plastic containment. The supply for these is from al local 4 way CU...
  20. B

    DNO application to connect for heat pumps

    You are probably aware of these Forms A, B and C on the MCS site: Microgeneration Certification Scheme - Heat Pumps which we have to complete prior to connecting a heat pump. I want to put the application in early on one of my jobs because it is a largish heat pump and in a village and I want...

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