system

  1. C

    Apartment complex lights not working or pool pump system. Novice maintenance man

    Apartment complex lights not working or pool pump system. Novice maintenance man with very little experience in electrical, and my job is on the line
  2. timhoward

    Halogen Lamp heating system, diversity?

    I'm in the middle of preparing a quote for installing 12 x 3Kw and 4 x 2Kw halogen heaters in a church. The system design was provided by a specialist company. This sort of thing: The system is specified to be split into five zones to be turned on depending on occupancy. Unless the church...
  3. HappyHippyDad

    What is a 'plug in' solar panel system?

    My best mate has been medically retired from the prison service at the young age of 52 and has time on his hands :D He's looking at a 'plug in' solar panel system. I've a read through it and with my limited experience of solar it looks like is is no different to a normal solar panel system...
  4. K

    ZE on tnc-s system

    Evening everyone . I was changing a fuse board today . Everything tested out fine and good . Until I measured the Ze which is on a tnc-s system . The result was 0.36 ohms now I know the max value for tncs is o.35 ohms . What would you guys do in this event call the dno or accept the result ...
  5. L

    What supporting equipment is needed to install a balcony photovoltaic system?

    Hi everyone, I am new to photovoltaic system installation, can you guys give me some advice. Currently I plan to purchase a Maysun Solar 800W balcony photovoltaic system. By understanding the accessories information, I found that there is currently a lack of special input sockets matching the...
  6. S

    Wet UFH/ Radiator system

    What’s the best setup for a system that has a heating system with existing radiators but a wet underfloor heating system is being added to a new extension. I will need a 3 channel programmer I assume? The plumber mentioned having it on all the time but just working on/off the independent stat in...
  7. P

    12v motor causing noise in 240v system

    Hi - On our small vessel we have a 12v failry powerful motor to run the autopilot, where the power is supplied by the boat's battery bank. On an 'independant' system we have 240v that is supplied via an inverter, but the power originates from the same battery bank as the 12v system. The...
  8. Calebp43

    What earthing system have we got here?

    Went to a house to extend a circuit and upon doing the minor works I couldn't figure the earthing system. There was no DNO cutout and L and N came from overhead powerlines. I followed the main earth cable down and it went half a foot below the consumer unit to a connector block with 3 small...
  9. P

    Adding a heat sensor to an existing, interconnected smoke alarm system

    I currently have a home with 7 interconnected, hard-wired smoke detectors. I have a hard-wired heat alarm in the garage that I need to have interconnected to the rest of the system, per local regulations. My solar installer added the heat sensor but does not seem to know how to handle the...
  10. N

    TT System High Ze leading to possible Zs fails

    Doing a lot of EICRs at the moment and have came across what I'm sure is a common enough problem. In an off grid rural cottage I have a TT system, Diesel Generator that runs and charges batteries when they are below 10 percent or so. Ra is about 150 Ohms... was about 3 ohms for Ze before main...
  11. W

    Proposal for an inverter for a solar system on a balcony

    Hello everyone, I currently have two solar modules left over from an installation and I would like to use them to set up a solar system on the balcony. The system has an output of 800 W. Can you recommend a suitable inverter for me? Thanks for the help.
  12. ekubec

    TC-ER-JP, cable used for minisplit system -- should it be in conduit outside ?

    Hi, folks.' I have a carrier 38MGRQ48E '5 zone' mini split system with 4 'heads'/evaporators installed, and one 'channel' still open. Had it installed about 6 years ago. At the time the tech said "You really should install the fifth one in your bedroom." I didn't listen to him and now i...
  13. B

    Is the earthing system TNCS or TT

    Carrying out a EICR in a commercial setting. In the main intake room the DNO supply comes in and it states clearly this is a PME system. 5 years ago it had a 120mm earth from the head going on to the MET which then had separate earths to each isolator on the panel. Within that time a new pumping...
  14. Audronius

    New property - looking for help understanding the heating system

    Hello! I've just moved in to a new property with "all electric" heating system and trying to figure it out. The agency/landlord are of no help so trying here. Previously only lived in properties with the usual gas combi boilers so a bit lost. It's a one bedroom flat with two of us living here...
  15. I

    TT System with TNS reading

    Shop with no earth coming from head, overhead lines in sight everywhere - definitely no earth from the DNO. Two 10mm earths going into the DB. One going to the water and another which disappears through a wall somewhere heading towards an external area never to be seen again. Customer doesn’t...
  16. G

    Multi door entry system

    I was working on a small door entry system today (4 flats ). It got me thinking , that say it was 16+ flats system , how would you go about dealing with the 16+ cables at the main entrance . Obviously a junction box system would probably be required , but was wondering how to over come that...
  17. Tom the Elder

    Installing groundwire system

    My 1951 CA home (none of original wiring grounded) has 7 receptacles* that have a separate ground wire extended into the subfloor and connected to the galvanized water pipes. Those pipes will soon be replaced with PEX. My plan is to drive ground rods with a new ground wire extending from the...
  18. B

    Regarding TT earth system

    Hi How do i access the earth rod to service it, where abouts will it be located and does a tt system have upfront rcds which will be probably in another enclosure? cheers B
  19. N

    CT clamp use in PV system

    I'm not going to touch it but I've a PV system installed that has CT clamp in supply meter. What does this do, why does it increase my import from grid?
  20. E

    Auto transfer switch caught on fire - should we be concerned about our house electrical system?

    Here’s what happened, we’re looking for a professional opinion: The auto transfer switch for our Generac stand by generator “exploded” (we heard a bang and the house shook a bit) and subsequently caught on fire earlier this week. It was mounted to an exterior wall. The generator was installed 8...

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