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  1. Marvo

    Multi function tester

    Nothing wrong with a floppy disk icon :) Nothing wrong with Chauvin Arnoux as a brand, I see they're eventually getting more popular in the UK of recent years but they've been around producing solid test gear for decades. I've got some old analogue panel voltmeters I recovered from a large...
  2. Marvo

    Moving Spirals in Fluorescent Lamps? and more...

    The way fluorescent tubes work internally is surprisingly complex. You can change the nature of the light output by disconnecting the earth (especially so with a steel batton type fitting) or even just laying your hand on the outside of the tube whilst it's lit and this is due to changing the...
  3. Marvo

    Repairing a GE WR60X266 Refrigerator Condenser fan

    Can you post a few pictures of the fan motor and its mountings from different angles please? If it's running intermittently it's probably bearings or bushes worn out which is A common failure mode for condenser fans which run in higher ambient temperatures. 2 fans in 23 years isn't bad. From...
  4. Marvo

    Hooking up a bandsaw from single phase

    I think the motor star and delta options are just two permanent wiring schemes and it would be wired direct on line. According to the IEC symbol on it, the transformer is a safety isolating transformer with no built-in short circuit protection. As Westward said, it will be to supply a control...
  5. Marvo

    Psychology of a plumber

    After getting my --- kicked by the plumbing twice I was not in the mood for taking prisoners. This time I removed and dismantled the pipework and specifically against manufacturers instructions I remade every conex joint after hemp and pasting it. I've just reassembled everything and sucess, no...
  6. Marvo

    Psychology of a plumber

    I found myself needing to do some emergency plumbing at home this evening. I've got a small guest flat on my property which has been empty for about a year now. I went in there the other day and noticed the bathroom was very humid and there was some mildew type mould starting on the tops of the...
  7. Marvo

    Using 220v chandelier in the US

    It depends on what lamps the chandelier uses and whether ther's devices like LED drivers in it. can you post a few pics of the chandelier and the lamps that it uses?
  8. Marvo

    Lost Neutral on 3 Phase system - how do you calculate the effect on line voltage

    To show the varying line voltages you can plot it as a phasor diagram then use Millmans Theorum to calc the voltages wrt supply neutral. There's other mathematical methods but they can get messy unless you're a bit of a math whizz. I'll see if I can find a link to an explanation that doesn't go...
  9. Marvo

    What is your hourly rate as a self employed electrician? (2023)

    I didn't vote because I don't want to skew the results being non-UK. I don't do domestic and very rarely do small jobs where I'm billing an hourly rate for just myself on the tools on site but on the odd occasion I do I would bill my time at ZAR1450.00 per hour which converts directly as about...
  10. Marvo

    1ph to 3 phase inverter

    It's gonna be expensive to use a 230 single phase to 400v 3 phase inverter that's capable of supplying a 4kw AC3 motor load. Might be cheaper to just replace the motor with a 230v single phase type.
  11. Marvo

    Cable termination of concentric cable

    Yeah.... I've never seen that particular concentric arrangement but I'm not UK based and it's something we don't get locally. There are special crimp on lugs for single solid aluminium conductors, also mechanical compression ferrules with an internal tongue and shear screws. There's a cleaning...
  12. Marvo

    Condensing extractor fan

    Like a recirculating fan with a dehumidifier unit attached? Not as far as I know or not on the small scale you need at least....
  13. Marvo

    Cable termination of concentric cable

    Is the concentric cable solid copper or copper coated aluminium? Some pics would be helpful. Concentric cable shouldn't be used buried direct, it's not an armoured cable so it's prone to underground damage from stones, rocks and subsidence. Concentric can be terminated using crimp-on lugs or...
  14. MFG_SBC.jpg

    MFG_SBC.jpg

    • Marvo
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  15. Marvo

    Fault finding weird issue

    Unlike an OCPD like an MCB, a residual current protective device won't trip even if there is a fault unless there's a load plugged in and some current flowing.
  16. Marvo

    Fault finding weird issue

    If it wasn't tripping immediately a load is plugged in and it is now then it's obviously something to do with the wiring you've altered. I'd guess there's a contact between neutral and earth somewhere but honestly I'd suggest you just pay an electrician for an hour of his time to get it sorted...
  17. Marvo

    Best way to install a very tiny light

    To do the room justice I think you need to make a minature light switch using a teeny weeny lever switch wired in 5mm surface mounted conduit to small warm white LED on the ceiling. Obviously your going to need to make a tiny consumer unit containing a single sub-minature circuit breaker and a...
  18. Marvo

    Replacing T8 fluorescent tube

    Is the new tube identical to the old one ie same voltage, same wattage output etc? Can you post a pic of the writing on the old tube as well as the new one? Did you replace the starter as well? If so is it also identical specifications? Also there might be 3 separate tubes but they could be...
  19. Marvo

    Planning software for semi-industrial installations

    I see one of the forum sponsors is Modecsoft who produce an electrical design software package. I don't personally know if it's suitable for your application but it might be worth a look..... https://www.electriciansforums.net/threads/modecsoft-electricalom-18th-edition-18-discount.170945/
  20. Marvo

    Planning software for semi-industrial installations

    There's nothing free that's easy to use. You could use something like LibreCAD jmight be an option if you're fluent with CAD programs but the learning curve to use the program without previous experience isn't going to be worth it for a single job. Also you'd need an add on package to do bill of...
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