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  1. Pat H

    Question about explosion

    Lots of these chargers around. Mostly from China. They often have no fuses or protection in them. Basically you are buying kit outside the EU with no checks on safety. We are happy to moan about EU rules but without them this is what you get. The drive to the bottom for price with safety not...
  2. Pat H

    Wiring Day Time running lights

    Most of these DLR setups work on a feed from the battery and a wire from the headlamp. The headlamp wire is to turn the DLR off when the headlamps are on. Thy cause dazzle at night otherwise. The DLR module uses the battery voltage to switch the lights on and off. When the engine starts and the...
  3. Pat H

    Under counter fridge earthing - Quick sanity check

    Or maybe the socket rather than the plug....
  4. Pat H

    Under counter fridge earthing - Quick sanity check

    Its more than possible that the compressor assembly and all the related electronics are isolated from the rest of the metal work. As already posted I'd check continuity to the compressor and surrounding metal work.
  5. Pat H

    94/95 Practical Assessments

    Pretty sure for my 95 I had to do dead tests first. That produced 2 issues that had to be spotted and identified. They are then rectified by the examiner and you then move on to live tests. I just followed the steps I'd been taught.
  6. Pat H

    Mouse been in a wiring loom.

    I'd be tempted to do a detailed visual inspection. Pull panels off and expose the loom. If its been nibbled there will be signs.
  7. Pat H

    Pete's Videos Chuck your extension leads away Guys and make your own

    Neat. All black wiring to look cool. No fuse anywhere in sight. What could go wrong....
  8. Pat H

    Pete's Videos Lost for words, what do you think?

    Isn't it a then a simple job to bypass the meter?
  9. Pat H

    R1+R2 on a cooker circuit

    Yes. I'd visually check the back of the cooker switch to check the cabling is correct and secure. The only variable then is the other end of the cable that connects to the cooker. And if its built in that's the too hard department.
  10. Pat H

    R1+R2 on a cooker circuit

    Yup that's my route. Live at the socket CPC at the cooker. Make an assessment of the cable length and CSA and use that to ensure R1+R2 is compliant.
  11. Pat H

    Pat Testing - If there's no earth on the plug, is it a fail?

    If you don't have a double square marking on your ar*e then yup that's it. But seriously I do work on repairing old equipment and if the unit is of value but non compliant then we can make it safe with additional isolation transformers etc. But it has to be worth the work and cost.
  12. Pat H

    Pat Testing - If there's no earth on the plug, is it a fail?

    Then there is no standard measure of the safety of the insulation. Its likely to be old and even if compliant (despite being before the standard for that existed) then it maynot be now.
  13. Pat H

    Pat Testing - If there's no earth on the plug, is it a fail?

    There should be a symbol on the unit with a box within a box to indicate class 2. A 2 core cable doesn't indicate its a class 2 device as it could have been replaced. Class 2 protection is an internal method of ensuring should the primary insulation/protection fail then any metal accessible...
  14. Pat H

    Inductance on lighting circuit

    inductance is magnetic fields from one cable inducing a current in an adjacent cable. Basically like what happens in a transformer. Capacitance is when two cables are separated by a insulator (can be air) this acts as a capacitor and capacitors will allow AC currents to flow through them. Both...
  15. Pat H

    Proper chuffed with myself.

    The Practical exam is a bit tough especially as you effectively do the 2394 then the 2395. Make sure you list your steps in the inspection and testing and follow it to the letter. Miss a key step and you will be deemed to be unsafe and asked to leave.
  16. Pat H

    ventilation brick big no no?

    Ventilation bricks provide ventilation. That's their job. Using one to pass a cable through will reduce the available ventilation ability of that brick. It will however save having to punch a hole through the fabric of the building that could otherwise be avoided. I wouldn't alter a run to use...
  17. Pat H

    Working live

    Notice his safety hat wasn't strapped on and fell off. Notice the chaos of the working environment. An accident waiting to happen.
  18. Pat H

    CPC/Earth feed to Light Switch Back Box

    Good point. One of the common issues with light switches is the screws from the face plate being long and puncturing the wires behind. Potentially leaving a live screw head. A plastic push in cover for each screw helps reduce that risk. Also taking care of the position of the cables as the face...
  19. Pat H

    CPC/Earth feed to Light Switch Back Box

    If the back box and light switch are both non metallic then no CPC is required. However care must be taken that a later owner doesn't add metal faced switches and a risk is created. We don't rely on RCD for protection as they can fail. You could leave a note in the plastic backbox as a reminder...
  20. Pat H

    increasing multimeter fuse rating

    The fuse in the meter is there to protect the components inside. Current is normally measured over a large low value resistor. If you upped the fuse you'd allow more current through the resistor and it would likely blow. Then its for the skip.

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