Lectrician
|
It doesn't look too big that cable. On that distance, I would expect a far larger cable.
Volt drop will most likely be exceeded when you draw larger loads, and the earth fault loop impedance may well be exceeded too, depending on what protection is up at the origin.
A good test for volt drop would be to turn some lights on, and then switch a decent load on/off, such as a heater, immersion, cooker etc. If you notice a substantial drop in brightness, you have volt drop issues.
Earth fault loop impedance can only be checked with a meter, but if voltage is an issue, earth fault loop is bound to be.
If the earth fault loop is exceeded, it means that a fault inside the consumer unit or on the cable up to it, may not clear within the 5 second disconnection time. It could take far longer to cause the fuse/trip to operate.
Have you considered getting an Electrical Installation Condition Report carried out?
|