DIYbanter - View Single Post

wrote:
A lamp's flex should have a cordgrip to stop bare wires getting pulled
out, and the cordgrips in bulb holders are sometimes almost useless. If
your bulbholder has a less than perfect clamping of the whole of the
flex, thats both inner and outer layers, then it is wise to add a
little cordgrippage in the lamp base. The simplest way is to knot the
flex on the inside of the flex entry hole, so it cant get pulled out.

NO. Never ever knot a mains flex. The conductors can be damaged, causing
a localised high resistance fault which can cause a fire.

Use a p-clip bolted to the lamp frame, or a proper cord grip. If nothing
better, fix a loop of cable onto itself with a cable tie so it can't be
pulled through a hole and can't be pulled tight onto itself into a knot.

Owain