Historical British Educational Film. Mummy and Daughter Change a Fuse Wire.

Chris Pearson:

 

Alasdair Anderson:

My one complaint with the film is that rather than forming the copper strands into a hook shape, I was taught to make a complete ring and twist with the wire to stop it coming loose (wrap round a small screwdriver shaft and give the screwdriver one rotation) which is much more secure - but not needed with modern plugs.

Very neatly done with those shepherd's crooks! I think that I have done it both ways.

 

I think there was a convention regarding the direction of the "wrap"  - the first one (the source side of the fuse) was made in a clockwise direction, so tightening the screw tightened the loop - the other end was made anticlockwise - so tightening the screw didn't stretch the wire, reduce the cross sectional area and thus reduce the rating


Or at least that's what I was taught back in the day


regards


OMS

Chris Pearson:

 

Alasdair Anderson:

My one complaint with the film is that rather than forming the copper strands into a hook shape, I was taught to make a complete ring and twist with the wire to stop it coming loose (wrap round a small screwdriver shaft and give the screwdriver one rotation) which is much more secure - but not needed with modern plugs.

Very neatly done with those shepherd's crooks! I think that I have done it both ways.

 

I think there was a convention regarding the direction of the "wrap"  - the first one (the source side of the fuse) was made in a clockwise direction, so tightening the screw tightened the loop - the other end was made anticlockwise - so tightening the screw didn't stretch the wire, reduce the cross sectional area and thus reduce the rating


Or at least that's what I was taught back in the day


regards


OMS