—Comparing the options
Repairing or replacing a distribution board
An old board is not automatically unsafe. Whether it should be replaced depends on condition, protection and capacity.
Boards can often be repaired: a failed device replaced, terminals tightened, labels renewed. Replacement makes sense when the board is damaged by heat, lacks suitable protection such as RCDs, has no space for needed circuits, or uses devices no longer available.
Comparison guides weigh two electrical options against each other and note where each one fits best.
Replacing a board involves isolating the supply, transferring circuits, testing and labelling. It is a good time to improve protection and plan capacity for future loads such as EV chargers or extra AC.
01In short
The points that matter most
Condition
Heat damage or deterioration favours replacement.
Protection
Missing RCD protection favours upgrade.
Capacity
No space for new circuits favours replacement.
Labels and records
A replacement is the moment to create an accurate circuit schedule.
02Detail
Decision factors
Parts availability
Obsolete devices make repairs hard.
Future loads
EV charging, extensions or extra AC.
Testing results
Inspection informs the decision.
Disruption
Replacement requires a shutdown.
03Checklist
Before deciding
Photograph the board
For assessment.
List planned additions
New circuits or appliances.
Note faults
Trips or warmth.
Plan the shutdown
Choose a time when the household or business can be without power.
04Questions
Questions people ask
- How long does a replacement take?
- It depends on circuits and testing; power is off during the change.
- Can a board be upgraded without replacement?
- Sometimes devices can be swapped.
- Is an old board dangerous?
- Not necessarily; condition matters.
- Does replacement need approval?
- In apartments, building approval is often required.
- Will new devices fit an old board?
- Only devices designed for that board’s make and busbar should be used.
- Can the board be moved at the same time?
- Sometimes, if cable routes allow; it adds to the scope.
05Related
Related guides
- Motion sensors or timers for outdoor lightsA related choice for the same kind of work.
- Replacing fluorescent tubes with LEDA related choice for the same kind of work.
- Outdoor fittings exposed to salt air and sunA check that catches the same trouble earlier.
- Electrical checks before summerA check that catches the same trouble earlier.
This guide sits under maintenance. All topics are on the guides page.
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Wondering about your board?
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