A partial power outage can be dangerous when it is caused by a loose connection, damaged wiring or a problem with the home’s service connection. Warning signs such as burning smells, heat, buzzing or lights that turn unusually dim or bright mean the outage needs prompt professional attention.
Many partial outages are caused by something as simple as a tripped breaker. The key is knowing which signs point to something more serious.
When a Partial Outage Is Usually Minor
A single tripped breaker or GFCI outlet can cut power to part of a home. If resetting it restores power and it stays on, the cause may have been a brief overload or a one-time event.
If the same breaker trips again, or trips whenever certain devices run, the circuit may be overloaded or have a fault that should be checked.
Warning Signs of a More Serious Problem
Some symptoms suggest overheating or arcing. These include burning or melting plastic smells, warm or discolored outlets and switches, buzzing or crackling sounds and scorch marks.
Lights that get brighter and dimmer at the same time in different rooms, or appliances that run strangely, can point to a loose or damaged neutral connection. This can expose equipment to abnormal voltage and may damage electronics.
If roughly half of your home loses power, the cause may be a problem with one side of your electrical service. This can involve the utility supply or a connection at the meter or main panel.
When the Utility May Be Involved
Not every partial outage starts inside the home. Problems with utility lines or equipment can cause partial power or unusual voltage. In Denver, contact Xcel Energy, the electric utility for most homes, if you suspect a supply problem.
If the utility confirms that its equipment is working, the problem is likely in your home’s service equipment or panel, and an electrician should check it.
What to Do Right Away
If you see smoke, flames or sparks, leave the home and call 911. Do not use water on an electrical fire.
If lights are dimming and brightening or you smell burning but there is no fire, unplug sensitive electronics if you can do so safely and avoid using large appliances. If it is safe to reach your panel, switching off affected circuits may help.
Do not open the panel, touch damaged wires or try to repair anything yourself. Stay away from downed power lines.
Partial outages with warning signs should be checked promptly. Our partial power outage repair in Denver page explains how these problems are diagnosed. Contact us to describe what is happening, and we can help you decide how urgently it needs attention.