IIRC, it was somewhere in the '70s when the regs were changed to require an earth on lighting circuits in new builds. It was common to see TW&E used in lighting circuits with the earth simply lopped off.
IIRC, it was somewhere in the '70s when the regs were changed to require an earth on lighting circuits in new builds. It was common to see TW&E used in lighting circuits with the earth simply lopped off.
Depends on the fitting.
Metal plate switches have become popular, and they usually stipulate an earth.
But with new wiring it's there if ever needed.
Its one of the "standard" mitigation options:
1966 when the 14th edition was introduced... (although some installers did not seem to get with the program until a few years later!)
Ah - thanks John. Since PVC wiring was around then, there are likely still quite a few houses around with no lighting earth - but the wiring otherwise good.
... snipped
... unless Jerry, Mickey, Minnie or (especially) "Danger" mouse have paid a visit :-(
That can happen to a new installation too. Although I'd hope a house built to decent standards would prevent rodent access to such areas.
10mm earth?
Perhaps it is armoured or has some other mechanical protection?
We get mice in the loft every harvest time. Even with modern construction it would be very hard to make a loft mouse proof. Most houses (but not ours) have exposed lighting wires in the loft.
Andy
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