Over heating on the netural?

[JohnW2]

... but it may never have been tight. It's not beyond the bounds of possibilities of human psychology and behavior that, "because it is the L' some of us may (subconsciously) be more rigorous in tightening L terminals than N ones.

But I would sincerely hope in the OP's scenario that the neutral would have had special attention paid to it after three or four occurences !

Well, one certainly might expect that - but it doesn't take much of study of human behaviour to find examples of people making the same mistake repeatedly, be it consciously or subconsciously. Were that not the case, few people would, for example, get seriously drunk more than once

... or, of course, that 'special attention' might be manifested as over-tightening the terminals and damaging the conductors (and/or terminal threads). 'Over-compensation' and 'knee jerk reactions' are examples of how 'learning from mistakes' can go a bit awry.

Kind Regards, John

 

[r.bartlett]

... but it may never have been tight. It's not beyond the bounds of possibilities of human psychology and behavior that, "because it is the L' some of us may (subconsciously) be more rigorous in tightening L terminals than N ones.

But I would sincerely hope in the OP's scenario that the neutral would have had special attention paid to it after three or four occurences !

Well, one certainly might expect that - but it doesn't take much of study of human behaviour to find examples of people making the same mistake repeatedly, be it consciously or subconsciously. Were that not the case, few people would, for example, get seriously drunk more than once

... or, of course, that 'special attention' might be manifested as over-tightening the terminals and damaging the conductors (and/or terminal threads). 'Over-compensation' and 'knee jerk reactions' are examples of how 'learning from mistakes' can go a bit awry.

Kind Regards, John

You're better off in the general discussion forum.

 

[r.bartlett]

Unfortunately, in my experience, 13A plugs, sockets or FCUs do not like being ran constantly at or near 13A !
You need to look at the loading of this fridge and number of starts as it could be too great for any of the 13A connection points (plug, FCU etc)
One or other of the poles could burn out due to excess load but in this instance coincidentally it is always the neutral.

There are 4 same fridges in a line on the same circuit. Only fridge 2 suffers from this. Started abut a year ago. Happened once, we changed the plug, 11 months later has happened 4 times in as many weeks..

The fridge load is split onto two separate 13a supply/ leads. The cooling - approx 4 amps running (which is the one which keeps failing)
The condensate heater (3kw)

Their electrician is going to site to check the mains and replace all the sockets

 

[JohnW2]

You're better off in the general discussion forum.

Hmmm. I'm not sure that GD would be a very appropriate place to make serious suggestions as to reasons why under- or over-tightening the screws of terminals might be more common for N ones than L ones!

Kind Regards, John

 

[r.bartlett]

delete