Common Electrical Faults in Petts Wood Homes

Working across Petts Wood, Orpington and the Bromley Borough every week, we see the same types of electrical problems come up regularly. The area's predominantly 1930s and 1940s housing presents some particular patterns. Here's a rundown of the faults we encounter most often and what's typically behind them.

1. Sockets That Have Stopped Working

One of the most common calls we get. Most of the time, the cause is one of three things: a blown socket (usually caused by a fault in an appliance that was plugged in), a tripped circuit that nobody noticed, or a loose connection — either at the socket faceplate, the junction box on the ring main, or back at the consumer unit.

In older Petts Wood semis, we also occasionally find sockets that were added at some point and wired into the ring main incorrectly, or where the connections have worked loose over time due to thermal movement. These are found easily during testing and are straightforward to fix.

2. Flickering Lights

Flickering lights can be caused by a loose connection at the light fitting, at the switch, or in the ceiling rose. In properties where the original loop-in wiring is still in place — common in 1930s houses — the connector blocks in the rose can corrode over decades and cause intermittent connections.

Occasionally, flickering across multiple circuits indicates a loose connection at the main incoming supply — this is less common but warrants attention. If multiple lights on different circuits are all flickering simultaneously, let us know when you message.

3. Absent or Inadequate Earthing

This is the single most common C2 finding on EICRs we carry out in the Petts Wood area. The main earthing and bonding arrangements must connect all metalwork (gas and water pipes) to the main earthing terminal. In many 1930s properties, the original earthing was done to different standards, or the system has been extended since without the earthing being properly updated.

Absent bonding is a quick job to rectify — it's a C2 rather than a C1 because while potentially dangerous, the risk is circumstantial rather than immediate. It's still important to address.

4. Old Rewirable Fuses

We still find rewirable fuse boards in properties across Petts Wood and Orpington — more often than you might expect. These ceramic fuse holders with thin wire inside were standard until the 1960s and 70s. They offer no RCD protection, they trip slowly compared to modern MCBs, and when a fuse blows, there's a temptation to replace the wire with something thicker than the original — which creates a fire risk.

Properties with rewirable fuses need a consumer unit upgrade. It's not something that can be part-remedied.

5. Damaged or Poorly Extended Wiring

In older properties, wiring has often been extended and modified by different people over many years. We regularly find connections made in inaccessible voids, inadequate joints, and circuits that have been extended beyond their original design in ways that reduce their safety margin. This turns up during testing and is typically classified as C2 on an EICR.

6. Outdoor Socket and Garden Lighting Issues

Garden electrics are increasingly popular in Petts Wood's well-kept suburban gardens. But they're also the source of a disproportionate number of fault calls — RCDs tripping when garden sockets get damp, damaged cables that have been damaged by garden tools or paving work, and light fittings that have degraded and are allowing moisture ingress.

All outdoor wiring must be RCD-protected and any cables buried underground must be either steel-wire armoured or run in conduit at adequate depth. Both are regularly overlooked in DIY garden electrical installations.

7. Overloaded Circuits in Extensions and Conversions

Many Petts Wood properties have had loft conversions or rear extensions. Electrical work in these spaces is sometimes carried out by builders rather than qualified electricians, and the results are occasionally problematic — circuits not registered, wiring not tested, sockets added in ways that overload the existing ring main. If you've had an extension and the electrical work wasn't done by a qualified electrician and certificated under Part P, it's worth having it looked at.