Between roughly 6 PM and 11 PM, residential buildings see their highest electrical load: people come home from work and switch on stoves, washing machines, kettles, TVs and air conditioners at the same time. This is exactly when complaints about flickering lights, dim bulbs, or a tripped breaker tend to spike.
But the cause is not always building-wide — sometimes the problem sits inside your own apartment wiring or panel, and in that case waiting it out overnight is not the right call.
Why load rises specifically in the evening
A building's electrical network is sized for a certain total capacity, but actual consumption is far from even across the day. In the morning and afternoon many apartments sit empty while people are at work or school. In the evening nearly every household switches on lighting, kitchen appliances, heaters or air conditioners at once. That pushes up the current in the shared building cables and the entrance feed, and voltage can sag slightly under load — a normal physical effect, especially in older neighborhoods where the incoming cables were sized for lower consumption than exists today.
High-power appliances add to this on their own: electric stoves, water heaters, split systems. The more apartments in a building running this kind of equipment, the more noticeable the evening voltage sag.
Is it building-wide or just your apartment
The simplest first step is asking neighbors on your stairwell whether they notice the same thing at the same time. If they do, the cause is likely the shared building network or the incoming feed cable, which is a matter for the management company or the utility. If your neighbors are fine and only your apartment flickers or cuts out, the problem is almost certainly in your own panel, wiring, or a specific circuit.
| Sign | Likely building network | Likely your own wiring |
|---|---|---|
| Neighbors | Similar issue at the same time | Neighbors are fine |
| Pattern | Lights dim gradually and recover | Sudden cutoff, breaker trips |
| What goes out | Lighting dims evenly across the apartment | One circuit, one room, or one outlet |
| Smell, heat | Usually none | Sometimes a burning smell or a warm outlet |
When the cause is in your panel
If the drops happen only at your place, the cause is often inside the apartment panel: a loosened terminal connection, a corroded or scorched busbar, or an older breaker that holds its rating less reliably than a new one. When high-power appliances — a kettle, a washing machine, a heater — go on in the evening, the combined current on one circuit can exceed what that line was built for, tripping the breaker or visibly sagging voltage on that circuit.
Another common cause is old aluminum wiring or an undersized cable left over from a previous renovation: that kind of line was never physically rated for today's load from several appliances running at once.
What you can safely check yourself
Without special skills there is not much you can safely do, but the following gives an electrician useful information:
- Note the exact time and duration of the drop or outage
- Note which appliances were running at that moment
- Ask neighbors whether they see anything similar
- Check by touch whether an outlet or switch feels warm, or if there is a burning smell
Opening the panel, touching terminals, or swapping a breaker yourself is not worth the risk of shock or short circuit. If you smell burning or see a discolored outlet, cut the load on that circuit right away and call an electrician.
When you genuinely need an electrician
Call a professional if the drops or outages keep repeating only in your apartment, if a breaker trips whenever a specific appliance is switched on, if an outlet or wire feels hot, or if neighbors confirm it is not a building-wide issue. A technician will check the load per circuit, the condition of connections inside the panel, and the wire gauge, and suggest redistributing circuits or replacing a section of wiring if needed.