Kitchen Undermount Lighting

[Brianmichael23]

Just installed LED undermount lights in my kitchen. They’re on a circuit with just one outlet. I wired 7 circuits during the kitchen remodel. The microwave is on its own circuit, but when I use it, the undermount lights dim. What could be the cause of this? The lights are on an “approved” dimmer, according to the manual. Lights and microwave are on separate circuits on a 200A service.

 

[Pete999]

Voltage drop when the MW is switched on

 

[Brianmichael23]

Voltage drop when the MW is switched on

Yes, but what would be the cause if the voltage drop? Is there any way to avoid this?

 

[Pete999]

Yes, but what would be the cause if the voltage drop? Is there any way to avoid this?

Yep put the MW on a different circuit for one.

 

[Brianmichael23]

Yep put the MW on a different circuit for one.

The microwave is on its own circuit. It isn’t shared with anything else.

 

[Scots John]

Shouldn’t be happening. How close is the microwave to the lights? There is a powerful magnetic field which should be shielded, if your lights are sensitive and in close proximity that may affect them.

 

[Brianmichael23]

Shouldn’t be happening. How close is the microwave to the lights? There is a powerful magnetic field which should be shielded, if your lights are sensitive and in close proximity that may affect them.

Close, but I also notice it when the disposal comes on, and the coffee maker in another room. Just bad lights?

 

[James]

remember guys when responding, this is a usa issue, don't respond unless you understand 230-110v split phase supplies. it could make quite a difference to what is going on here.

 

[Scots John]

Close, but I also notice it when the disposal comes on, and the coffee maker in another room. Just bad lights?

No, something amiss. If you can’t track it down yourself the get a sparky.

 

[Scots John]

remember guys when responding, this is a usa issue, don't respond unless you understand 230-110v split phase supplies. it could make quite a difference to what is going on here.

My error, apologies.