15/08/2026
⚡️ Another job where testing uncovered something that really shouldn’t be ignored! ⚡️
This one started as a fairly straightforward kitchen upgrade — but, as is often the case, the testing told a different story… 👀
🔧 The customer required:
• 4 new circuits for a new kitchen
• Consumer unit replacement
• SPD + individual RCBO protection
• Switch-fuse upgrade in the garage
During our initial inspection and testing, we noticed the property had a TN-C-S/PME supply, but also had an earth electrode installed.
When testing the earth electrode, the resistance was over 1999Ω — far from what we'd expect. 😬
Even more importantly, we found voltage present on the CPC back towards the supply cut-out, meaning we couldn't safely continue with certain tests.
🚨 Time to stop and investigate.
We contacted National Grid, who responded quickly and attended site. They identified that the earth link within the cut-out was missing.
The cut-out was replaced, the supply was made safe, and we were then able to continue with the installation and testing.
✅ 4 new kitchen circuits installed
✅ New consumer unit with SPD & RCBO protection
✅ Garage switch-fuse replaced/upgraded
✅ Supply issue identified and rectified
✅ Full testing and certification carried out
It’s a great example of why proper inspection and testing isn't just about ticking boxes — sometimes it uncovers issues that could otherwise go unnoticed.
At A2Z Electrical Innovations, we don't just install and walk away. We test, investigate and make sure the installation is safe and fit for purpose from start to finish. ⚡️
Engineering Reliable Electrical Solutions.
📞 07495 914745
📧 [email protected]
🌐 a2zelectrical.co.uk