High hot pump jet speeds cause lights on a different breaker to flicker

Status
Not open for further replies.

csalt

Member
Location
USA
Occupation
Electrical Engineer, Navy Electrician (out of practice)
Good afternoon,

We hired an electrician to replace the lights in our basement. Previously there was one circuit of fluorescent lights for the whole basement on a single switch at the top of the stairs. The electrician removed all of the fluorescent lights, and split that existing lighting circuit so that we could control each half of the basement independently. The finished half of the basement has a drop ceiling and uses two 0-10V LED drop-panel lights, and the unfinished half has three LED shop lights on a digital dimmer. There are no other loads on this basement light circuit.

We also have a large hot tub. When we put the hot tub jets into their highest speed setting, the LED shop lights on the unfinished side start to flicker, regardless of their dimmer settings (high or low, still flickers). No other lights in the house flicker (all LEDs, some of them dimmable), and it is 100% reproduceable by turning on the hot tub jets to their highest setting. However, if I turn on the lights for the finished half, then the unfinished half will stop flickering even with the hot tub pumps running. This makes me think its a quirk of the dimmer/led bulbs not putting enough load on the circuit? But but then why only flicker when the hot tub pumps are on?

I want to make sure this is not a sign of a dangerous issue. If it is simply a quirk of the bulbs/digital LED dimmer, then I can live with it because it is rare that we are both in the basement and running the hot tub (plus we can stop it by turning the other half of the circuit on).

Very Respectfully,
csalt
 
You should call the electrician back so he can investigate. He should be able to troubleshoot the issue.
RIIIIIIIGHT,
welcome to the real world of LED drivers and the funny effects of quirky things that happen when they don’t play well with other products.
 
I would be interested if anyone has a theory on this or the results of the electricians trouble shooting as it may lead to a valid design consideration to consider.
 
Sounds like there is not enough load on the dimmer with the LED lights. Lutron makes a load capacitor called (I think) a MLC (minimum load capacitor) which sometimes comes with their wireless products. These add a simulated load to help with things like the flickering the OP is having. You could even get your own capacitor of the correct size and try it. Probably be best to see if your electrician and can get one and install it for you. Look up Lutron and look for the MLC.
 
I appreciate the feedback. The electrician is coming today to troubleshoot and I will update this thread.
 
The electrician found water corrosion on the neutral wire inside the conduit leading into the house for the main breaker box. He is saying that it will get worse with time and we will need a new main box and new wiring/conduit coming into the house. His theory is we are seeing the flickering on this new LED circuits because of how low of a load they are, they are more sensitive to the wiring issue.
 
Status
Not open for further replies.
Top