A proper extension lead to a domestic air raid shelter would be acceptable in wartime, and arguably acceptable even in peacetime if in good condition and used sensibly.
The concern during the last war was bits of twin lamp flex, possibly with improvised joints, being used to supply a metal framed heater, in a metal structure that was well earthed fortuitously by circumstances.
A late relative of mine owned an electrical shop during the war, and offered for sale "safe shelter lighting outfits" one type used four large dry cells and a pendant light with two bulbs, 40ma for prolonged minimum lighting and maximum battery life, and 300ma for a brighter light that still gave 100 hours service from the dry cells.
Another outfit used a small transformer located in the house, and a 6 volt bulb.
A proper extension lead to a domestic air raid shelter would be acceptable in wartime, and arguably acceptable even in peacetime if in good condition and used sensibly.
The concern during the last war was bits of twin lamp flex, possibly with improvised joints, being used to supply a metal framed heater, in a metal structure that was well earthed fortuitously by circumstances.
A late relative of mine owned an electrical shop during the war, and offered for sale "safe shelter lighting outfits" one type used four large dry cells and a pendant light with two bulbs, 40ma for prolonged minimum lighting and maximum battery life, and 300ma for a brighter light that still gave 100 hours service from the dry cells.
Another outfit used a small transformer located in the house, and a 6 volt bulb.
