Main information
What it could mean
When two separate circuits are affected at once, it's worth ruling out a common fault (like the main RCD) before assuming two independent faults.
Safety first
Note exactly which areas are affected; it helps determine whether they share a common point in the installation.
Next step
If the main RCD is fine and both circuits are still affected, it could be two independent faults worth checking separately.
Frequently asked questions
Is this more serious than a fault in one circuit?
Not necessarily more serious, but it does require checking whether there's a common cause or two separate faults.
Could the main RCD be the source of both?
Yes, that's the first thing worth ruling out when several circuits fail at once.
Can both circuits be repaired in the same visit?
In most cases yes, assessing the scope of each during diagnosis.
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Describe the issue and area. Availability and scope are confirmed before work begins.