Main information
What it could mean
A switchboard that feels hot can indicate a general overload, loose connections on the busbar, or protective devices in poor condition.
Safety first
Don't open or handle the switchboard. If the heat comes with a smell or noise, switch off the main breaker if you can do so safely.
Next step
Switchboard heating is treated as a priority issue since it can develop into a more serious fault if left unchecked.
Frequently asked questions
Is it normal for the switchboard to feel slightly warm?
Mild, constant warmth can be normal depending on load; noticeable or increasing heat isn't.
What can cause general switchboard heating?
Loose busbar connections, sustained overload, or worn protective devices.
Should I switch off the main supply if the switchboard feels very hot?
If you can do so safely and the heat is noticeable, that's a reasonable step while it's checked.
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