4 ms·

Its funny, I replaced 2 spot lights in my kitchen with leds and when I use one certain kitchen device (high speed rotation thing) the leds start flickering vis

Its funny, I replaced 2 spot lights in my kitchen with leds and when I use one certain kitchen device (high speed rotation thing) the leds start flickering visibly.

lightedman 10y ago
One or the other doesn't have proper grounding or the cable for power to your appliances is run too close to your cable for lighting (which should be on separate circuits, mind you!)
- Freestyler_3 10y ago
  Different rules here. There is proper grounding, but both the device and leds do not use grounding. Grounding is just for the metal cases, the lamp holder for example.
  - lightedman 10y ago
    Proper grounding regardless helps eliminate this. https://www.youtube.com/watch?v=l6bTSJVLCVI https://www.youtube.com/watch?v=l6bTSJVLCVI - I used to build fully-functional hydroponics buildings from the foundation-up. Electrical included.
    - Freestyler_3 10y ago
      How do you ground a light bulb, and a motor inside a plastic case? Ground is for safety in AC, when there is a short the ground should take the current away resulting in power loss through the earth that in turn makes the breaker flip. Without grounding the wire that is exposed and touching something will (depending on material etc.) not transfer any current because of too high resistance, then as you touch it it will shock you and then the breaker will go off. (A loss power breaker, not a draw power breaker) Perhaps you mean the neutral?
      - lightedman 10y ago
        "How do you ground a light bulb, and a motor inside a plastic case?" Same way you complete any other ground - since ground and neutral are literally on the same leg (go look at any installation. You've got TWO wires coming in at the mains, ungrounded.) So, tell me, how do you ground those ungrounded 240/277V wires?? You don't. Both of them ARE the natural ground dependent upon whether you're at the peak or trough of the waveform. That's kinda how AC works.
        Spare_account 10y ago
        ground and neutral are literally on the same leg (go look at any installation. You've got TWO wires coming in at the mains, ungrounded.) Forgive my ignorance, I'm no electrical expert, but did you just say that the ground wire is connected to the neutral somewhere in the circuit? Or did I misunderstand you?
        lightedman 10y ago
        That's exactly right. Ground is always tied to neutral in a single-phase 120V installation. Open your breaker box and remove the front panel. You'll see it. http://i.imgur.com/hCY1jV0.png http://i.imgur.com/hCY1jV0.png EDIT: That "always" is assuming the house is modern wiring and not older-style two-prong wiring for the wall outlets. Those systems were just main and neutral at the box and controlled by a fusible link.
        Spare_account 10y ago
        Intriguing. I'm from the UK and I believe we do it differently here because I have an RCD on my earth bar in the consumer unit. The RCD detects current on the earth wire and cuts power to the circuit instantly. An earth fault doesn't trigger the circuit breaker, it triggers the RCD. A fault between live and neutral would trigger the circuit breaker. If I'm understanding you correctly, in the US the ground wire is functionally identical to the neutral due to the bonding. Therefore (this is my own deduction and I'd appreciate being corrected if I'm wrong) you could, in theory, invert the ground and neutral wires in the plug of an electrical appliance and there would be no change in the behaviour or safety of the appliance?
Natanael_L 10y ago
That device must be causing the powerline voltage to dip harder than normal (or otherwise screw with the voltage waveform), more than the capacitors in the AC/DC converter for the LED lights are designed to handle. And thus uneven current = flickering light.

Its funny, I replaced 2 spot lights in my kitchen with leds and when I use one certain kitchen device (high speed rotation thing) the leds start flickering visibly.

lightedman 10y ago

One or the other doesn't have proper grounding or the cable for power to your appliances is run too close to your cable for lighting (which should be on separate circuits, mind you!)

Freestyler_3 10y ago
Different rules here. There is proper grounding, but both the device and leds do not use grounding. Grounding is just for the metal cases, the lamp holder for example.
- lightedman 10y ago
  Proper grounding regardless helps eliminate this. https://www.youtube.com/watch?v=l6bTSJVLCVI https://www.youtube.com/watch?v=l6bTSJVLCVI - I used to build fully-functional hydroponics buildings from the foundation-up. Electrical included.
  - Freestyler_3 10y ago
    How do you ground a light bulb, and a motor inside a plastic case? Ground is for safety in AC, when there is a short the ground should take the current away resulting in power loss through the earth that in turn makes the breaker flip. Without grounding the wire that is exposed and touching something will (depending on material etc.) not transfer any current because of too high resistance, then as you touch it it will shock you and then the breaker will go off. (A loss power breaker, not a draw power breaker) Perhaps you mean the neutral?
    - lightedman 10y ago
      "How do you ground a light bulb, and a motor inside a plastic case?" Same way you complete any other ground - since ground and neutral are literally on the same leg (go look at any installation. You've got TWO wires coming in at the mains, ungrounded.) So, tell me, how do you ground those ungrounded 240/277V wires?? You don't. Both of them ARE the natural ground dependent upon whether you're at the peak or trough of the waveform. That's kinda how AC works.
      - Spare_account 10y ago
        ground and neutral are literally on the same leg (go look at any installation. You've got TWO wires coming in at the mains, ungrounded.) Forgive my ignorance, I'm no electrical expert, but did you just say that the ground wire is connected to the neutral somewhere in the circuit? Or did I misunderstand you?
        lightedman 10y ago
        That's exactly right. Ground is always tied to neutral in a single-phase 120V installation. Open your breaker box and remove the front panel. You'll see it. http://i.imgur.com/hCY1jV0.png http://i.imgur.com/hCY1jV0.png EDIT: That "always" is assuming the house is modern wiring and not older-style two-prong wiring for the wall outlets. Those systems were just main and neutral at the box and controlled by a fusible link.
        Spare_account 10y ago
        Intriguing. I'm from the UK and I believe we do it differently here because I have an RCD on my earth bar in the consumer unit. The RCD detects current on the earth wire and cuts power to the circuit instantly. An earth fault doesn't trigger the circuit breaker, it triggers the RCD. A fault between live and neutral would trigger the circuit breaker. If I'm understanding you correctly, in the US the ground wire is functionally identical to the neutral due to the bonding. Therefore (this is my own deduction and I'd appreciate being corrected if I'm wrong) you could, in theory, invert the ground and neutral wires in the plug of an electrical appliance and there would be no change in the behaviour or safety of the appliance?

Natanael_L 10y ago

That device must be causing the powerline voltage to dip harder than normal (or otherwise screw with the voltage waveform), more than the capacitors in the AC/DC converter for the LED lights are designed to handle. And thus uneven current = flickering light.