My RCD keeps tripping — what should I do? +
An RCD that keeps tripping is detecting an earth leakage fault, which could be a sign of damaged wiring or a faulty appliance. Start by unplugging all appliances on the affected circuit, then reset the RCD. Plug each appliance back in one at a time to identify the culprit. If the RCD trips with nothing plugged in, the fault is in the fixed wiring and you need an electrician in Cambridge to trace and repair it.
How often should I have my electrics inspected? +
The IET Wiring Regulations recommend an electrical inspection (EICR) every 10 years for owner-occupied homes, every 5 years for rented properties (this is a legal requirement for landlords), and every 5 years for commercial premises. If your home was built before 1980 or has never been inspected, it is worth booking an EICR sooner. The inspection will identify any deteriorated wiring, missing earthing, or outdated components.
What is Part P and why does it matter? +
Part P of the Building Regulations covers electrical safety in dwellings. Certain types of electrical work — including new circuits, consumer unit replacements, and work in bathrooms or kitchens — are classed as notifiable and must either be carried out by a Part P registered electrician or inspected by building control. Using a registered electrician saves you the building control fee (typically £200–£300) and ensures the work is properly certified.
What is the difference between an RCD and an MCB? +
An MCB (Miniature Circuit Breaker) protects against overcurrent and short circuits — it is the modern equivalent of a fuse. An RCD (Residual Current Device) protects against earth leakage, which is what can kill you if you touch a live wire. Modern consumer units use RCBOs, which combine both functions into a single device per circuit, giving you the best protection. If your consumer unit still has rewirable fuses, it is overdue for an upgrade.
Why do my lights flicker in Cambridge? +
Occasional flickering is usually caused by a loose bulb or a poor connection at the light fitting. Persistent flickering across multiple lights can indicate a loose neutral connection at the consumer unit, a faulty main switch, or an issue with the incoming supply. If all lights in your home flicker simultaneously, this could be a supply-side issue — contact your DNO first. Otherwise, have an electrician in Cambridge check the connections at your consumer unit.
What should I do if a socket is sparking? +
Stop using the socket immediately and switch off the circuit at the consumer unit. Sparking when plugging in can sometimes be normal (a brief blue flash), but persistent sparking, blackening around the socket, or a crackling sound indicates a serious wiring fault. Do not attempt to remove the socket faceplate yourself — call a qualified electrician in Cambridge to inspect and repair it safely.