From the field
What I Found — EICR finds from the field
Real faults. Real jobs. One photo, one infographic, one plain-English explanation per entry. Updated as jobs produce them.
This isn't about naming and shaming. These faults appear on installs by registered contractors, by DIYers, and on decades-old work where the regulations have simply moved on. What they all have in common: they're invisible unless you look. That's what an EICR is for.
Unidirectional RCBO, Solar PV
An RCBO that can only detect faults from the grid supply, fitted on a circuit that also generates electricity.
Separated CPC, Solar PV isolator to inverter
The earth conductor between the AC isolator and the inverter has come apart. On a live generating system, that's danger present.
Mixed-brand MCB in a split-load consumer unit
A different-brand MCB fitted into a consumer unit it wasn't designed for. The protection system hasn't been tested as a whole.
Type AC RCD, modern appliance circuits
A Type AC RCD fitted on circuits serving modern appliances. It can't detect the fault current these appliances produce.
A sub-main too small for its supply
A 16mm armoured sub-main protected only by the 100A service fuse. Far too small for the supply, so the cable could overheat before anything tripped.
A ring circuit with a leg taken away
The ring tested open, but not because of a loose terminal. It had been cut, and one leg taken up to the immersion heater, leaving a long radial on a 32A breaker.
Wondering about your own installation?
An EICR is the only way to know for certain. I price by circuit count, not bedroom count. See how it works.