Lights dim with vacuum running


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Old 08-08-19, 07:45 PM
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Lights dim with vacuum running

Hello, the lights in our master and living room dim and remain dim while vacuum is on. Have tried two different vacuums. Have also made sure wiring is tight and correct at outlet and circuit breaker. Both rooms are on different 15amp circuits while the vacuum is 10 amp. I can run vacuum fine in other rooms on separate 15amp circuits with same amount of items plugged in. The house is 2 years old and have had this issue from day 1. Any and all advice will be appreciated.
 
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Old 08-08-19, 08:18 PM
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Welcome to the forums.

Not really an issue. Just a normal occurrence. A 10A vacuum on a 15A circuit will cause a reduction in voltage and the lights will dim. The further the vacuum and the circuit is from the panel..... the more the lights will dim. Consequently the closer the vacuum is to the panel less dimming will be noticed.
 
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Old 08-08-19, 08:24 PM
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So the living room and master where the lights dim are the closest rooms in the house to the breaker panel. The rooms on other 15amp circuits are further away and lights do not dim in those rooms.
 
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Old 08-08-19, 09:25 PM
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I don't know where your panel is in relationship to your rooms but typically the longer the wire the more voltage drop and the lights dim more.
 
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Old 08-09-19, 07:02 AM
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Hi, what other Stuff is plugged into those circuits, you may think not much but do you really know, unplug everything and see what happens.
Geo
 
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Old 08-09-19, 11:15 AM
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This will occur if the vacuum or other high current items (generally motors) are on the same circuit as the lights.
This is common in order homes where multiple rooms or the 12 outlets per circuit may not have been followed.
 
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Old 08-10-19, 11:26 AM
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You may want to inspect all of the receptacles in the daisy chain that makes up the branch circuit. For push in connecitons, redo those using the screws on the sides of the receptacles and switches, etc. If the connections are already made using the screws, double check that the screws are not loose.

In the breaker panel verify that all of the smaller screws and set screws are tight. Flip off each breaker before touching the screw(s) on it. Someone with lots of experience should check the big lug screws.

(Do not use mighty tremendous strength when tightening screws.)
 
 

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