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Thread: Dimmer Pro Tripping Breaker

  1. #1
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    Dimmer Pro Tripping Breaker

    Recently updated a Diva C.L. switch with a PD-10NXD Caseta Pro dimmer switch. After a few weeks the breaker started tripping so I put the Diva C.L. switch back in and now it's fine. Is this related to the LED+ function in the Diva dimmer?

  2. #2
    Lutron Technical Support
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    Try running the PD-10NXD without the neutral connected to the dimmer. Your breaker may be sensitive to neutral-based dimmers.

  3. #3
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    Thanks will do!

  4. #4
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    Is it an arc-fault breaker? Arc-faults detect high frequency noise. LEDs generate high frequency noise and dimmers can act like amplifiers. Most manufacturers recommend limiting the load to 1000w per breaker to minimize nuisance tripping.

    You can try adding or removing some bulbs. It is possible the Caseta may have a problem with that particular bulb even though the Diva didn't.

    I wouldn't recommend running the 10NXD without the neutral connection.
    Convergence Technologies Raleigh, North Carolina
    www.convergenceusa.com

  5. #5
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    What happens if you don’t use the neutral?

  6. #6
    Lutron Technical Support
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    For PD-10NXD, a neutral connection is only required for MLV loads, LED drivers, dimmable ballasts, and power modules. If not using one of these load types, the neutral connection is not required.

    Caseta Wireless Load Spec: http://www.lutron.com/TechnicalDocum...369987_ENG.pdf

  7. #7
    Senior Member
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    Nothing dangerous is likely to happen if you don't connect the neutral. Per the specs that Kyle L. so generously posted, the only load you can use without the neutral is incandescent/halogen. I got the impression from the OP that LEDs were being used. I still recommend connecting the neutral. There is no negative, only positive from using the neutral.

    FYI, if the neutrals in the wallbox are separated, make sure you use the right neutral. Using the neutral from a different circuit can make an ARC-Fault breaker trip.
    Convergence Technologies Raleigh, North Carolina
    www.convergenceusa.com

  8. #8
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    Thanks for the info guys. There is only 1 neutral junction in the box. Is it possible to swap the breaker out with a different kind?

  9. #9
    Lutron Technical Support
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    You technically can swap out the AFCI breaker with a regular one, but it is not recommended. They are required by new electrical codes for fire safety reasons. You should probably consult a licensed electrician in your area to decide whether or not this would be safe to do.

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