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#59814 - 12/15/05 05:10 AM Lights flicker
sandro2 Offline
Member

Registered: 03/26/05
Posts: 49
Loc: philadelphia,PA
I received a call of lights flickering at a restaurant when the dishwasher kicks on.
What are some things to look for.
I checked for loose neutrals,hots.
They are on different circuits

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#59815 - 12/15/05 05:34 AM Re: Lights flicker
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
Flickering as in actually going on and off a time or two, or just a momentary dip in brightness?

If the latter then it might just be the normal momentary voltage drop on the feeder caused by the switch-on surge of the motor.

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#59816 - 12/15/05 05:46 AM Re: Lights flicker
sandro2 Offline
Member

Registered: 03/26/05
Posts: 49
Loc: philadelphia,PA
a momentary dip in brightness.

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#59817 - 12/15/05 05:47 AM Re: Lights flicker
sandro2 Offline
Member

Registered: 03/26/05
Posts: 49
Loc: philadelphia,PA
Is there any way to solve this. It looks really bad when you have many people in a restautant and the lites dim every so often.

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#59818 - 12/15/05 06:19 AM Re: Lights flicker
Dnkldorf Offline
Member

Registered: 12/12/04
Posts: 1091
Loc: nowhere usa
What type of lights, incandesant or fluro?

Dnk...

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#59819 - 12/15/05 06:37 AM Re: Lights flicker
sandro2 Offline
Member

Registered: 03/26/05
Posts: 49
Loc: philadelphia,PA
incadescent

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#59820 - 12/15/05 09:01 AM Re: Lights flicker
earlydean Offline
Member

Registered: 12/22/03
Posts: 749
Loc: Griswold, CT, USA
Aside from moving the lights from phase A to phase B, or upgrading the service so that the dishwasher load won't appreciably effect the available voltage to the lights, or reducing the load to the lighting circuit by sharing the circuits, I guess the only thing is to reduce the draw on the dishwasher. Can the dishwasher be connected 240 volts? How about 3 phase?
_________________________
Earl

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#59821 - 12/15/05 09:09 AM Re: Lights flicker
sandro2 Offline
Member

Registered: 03/26/05
Posts: 49
Loc: philadelphia,PA
The service is new. I guess I can try and see if the manufacture has a 240v model instead

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#59822 - 12/15/05 06:36 PM Re: Lights flicker
ShockMe77 Offline
Member

Registered: 06/11/05
Posts: 823
Loc: Rahway, New Jersey
I would check and see if both circuits were on the same phase. If they are on the same phase, put one of the two on a different phase. It's worked for me before. Good luck!

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#59823 - 12/15/05 08:00 PM Re: Lights flicker
sierra electrician Offline
Member

Registered: 02/12/05
Posts: 220
Loc: North Fork, CA USA
If the PoCo Xfmr is shared, the loads at the neighbors house can cause the lights to flicker and dim. I the dwelling is at or near the end of the Poco ckt this can happen too. This may not be the problem but, you could be chasing ghosts.

Rob

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