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  1. T

    TT with low ze when bonding connected

    TT System with 31 ohm ze that drops down to 0.31 ohms when the bonding is all connected Am I right in thinking that's because a house nearby has been converted to a tncs and they share a common bonded gas supply?
  2. lozarus

    Testing when modifying a circuit

    Afternoon all. Bear with me on this one... Despite having been involved in the electrical industry for many years, I'm only just about to embark on 2391 - its more of a personal endeavour than anything, having been very interested in inspection & test for a long time (I know, not everybody's...
  3. K

    Pool Tingling when touching water and deck

    Pool electrical is fed from a secondary sub panel that is fed from another sub panel coming off the main service entrance panel. I have verified that neutral is only bonded to ground at the main service panel. Neutral is not bonded to ground at any of the sub panels. Folks have been feeling a...
  4. M

    Sparks when trying to test golf cart batteries with a volt meter

    I bought a used golf cart a few days ago which had their batteries replaced last year. They hooked up an am/fm radio to it and it worked fine when you flip a separate switch. There is a “Tow” switch by the batteries that I was told to switch it to when not using the cart so there wouldn’t be any...
  5. Neptune

    When do amp ratings matter

    Got some amateurish questions. Please excuse me but want to set this straight in my head. Do amp ratings only matter when current is being drawn i.e. an appliance plugged in, light fitting, etc. To expand, if I have a 50amp MCB with a 1mm T&E cable going into a 5amp junction box, would that...
  6. E

    Energy is imported from the grid when there is enough generation (battery never got below 70% yet)

    I have on grid system with 2 strings going to dual MPPT inverter and 6kW battery. It usually happens when there is no generation but as seen on the photos below it does happen on occasions when solar production is sufficient to cover the load. Sometimes this trickle of import will add up to 1kW...
  7. S

    DC isolator arcing when turned off

    At work we've got an 8 panel single string set up, going into a 3000w inverter via a double pole DC isolator. The AC goes supply > isolator > meter > inverter. Obviously the DC usually comes from the roof, into the DC isolator, into the inverter where it's converted to AC which then goes back...
  8. Qwe7410

    How to keep power trips isolated and not trip the whole place when testing faulty appliances?

    Having some 1400W 230V heaters to test and repair that have a power trip problem. I've unplugged all the connections and open them up one by one to identify the part that is causing the trips. Everytime it trips, it trips the whole place through the main circuit breaker. How can I do it safely...
    • Qwe7410
    • Thread
    • appliance appliances faulty how to isolate isolated place power testing trip trips when whole
    • Replies: 2
    • Forum: DIY Electrical Advice
  9. jolb72

    black screen when fridge motor or heater starts

    Hi there I’m looking for some help as I have what seems to be an electrical issue. It seems to relate to my computer PC, the fridge freezer in my kitchen and my electrical heater. My computer PC tower is connected to my smart TV so I can use my TV as a PC monitor as well as a TV. The problem...
  10. I

    Surge - Commercial - When is an SPD required?

    Can anyone advise when SPDs are required to be installed on commercial properties? I'll always install them on a full rewire of a commercial property or if I need to install a new DB, I'll make sure to fit one with an SPD installed. What about if its a large store, 36 to 72 way existing board...
  11. m3770man

    This is the mess we got stuck with when we moved into our apartment.

    I want to put a new light up, but can't tell which wires go to the switch and which ones I even need for the new light, let alone which ones were originally what color.
  12. R

    RCBO tripping even when the switch is off

    Hi I have an RCBO that keeps tripping. It is a new install to feed an EV charger with an isolation switch between and is around 5 foot from the switch board. The RCBO trips at random when the switch is off to isolate the EV charger. It has not tripped when the charger is turned on. I have...
  13. S

    Clicking/popping sound coming from wall when tv switched on

    Hi, looking for some advice.. the wall behind my tv makes clicking/popping noises when my tv is switched on and again when it’s switched off. It’s similar to the noise TVs make when they’re heating up/cooling. Don’t want the electrician to have a wasted visit if it’s nothing?
  14. J

    UK WHY? - When connecting 2 phases in 3p, we get 400v

    When we use 1 phase, L1 or L2 or L3 - we get 240V When we use 2 phases, L1 & L2, or L1 & L3, or L2 & L3 - we get 400v. When we use 3 phases, L1 & L2 & L3 - we get 240v?
  15. marconi

    when did they stop selling these 3phase 32A switch fuses?

    Colleagues - may have some help in finding out how old or when they stopped selling this item piece of switchgear please? Is it BILL as I recall it is without revisiting the site? And from this picture alone what do you think of its material state and life remaining? I have other pictures but...
  16. P

    What are things to consider when starting out on your own?

    I have been working on site and for other people for the last 5-6 years but here and there I’ve done private works and I appreciate the freedom more and feels more rewarding when you complete a job and the customer is happy. I am not niceic registered or with any of the other boards, I’ve just...
  17. OnlQQker

    Just When I Thought I Was Understanding Electrics To A Small Degree...

    I go and watch something like this...
  18. P

    Why do people uprate cable when it's not required?

    Just sat looking at my old cooker that's sat in my kitchen with a piece of 6mm2 hanging out of it. Its info plate in the door says it pulls a max of 5.3kw, which using P/V gives us 23a which means it could easily be put on 32a and 4mm, or 25a and 2.5mm no? Yet it was on 6mm and a 45a breaker...
  19. T

    Texecom Veritas 8 - Zone open when setting alarm

    Hi, Our alarm always has a zone open whenever we set it. The zone consists of two door sensors and three shockguards. Is there a way to work out where the problem is? Also we dont have an engineers code. Thanks!
  20. D

    Two seperate +12V Outputs - When Turning left or right

    Hi I have Toyota RAV4, 2010 I have question for you, I am going to install two mirror cameras to turn on when turning lights are on (left camera to turn on, when left turning light is on and right camera to turn on when right turning light is on). To do this, I need to detect positive 12V...
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