On Tuesday, 18 August 2020 15:58:52 UTC+1, John Rumm wrote:
On 18/08/2020 11:45, tabbypurr wrote:
On Tuesday, 18 August 2020 00:57:27 UTC+1, John Rumm wrote:
On 17/08/2020 23:04, tabbypurr wrote:
On Monday, 17 August 2020 22:29:49 UTC+1, Cursitor Doom wrote:

You frequently use the term "fault current" which crops up
frequently when professional electrical engineers are discussing
installations. However, for everyone else, it requires
clarification. I'm not an electrician, so I have no idea when you
use that term whether you're referring to *short circuit* current
or *earth leakage* current or something else altogether (unless you
use an example as you did above but even that's not watertight).
And then there's that lot that read this through Homeownershub -
God only knows what *they* make of it. ;-


The electrical wiring regs' meaning of 'fault' is a hard zero ohm L-N
short..

or L-E

John uses that meaning. Those of us that are more into
repairing things tend to use 'fault' to mean any failure to operate
correctly. The I with some Es seems to like to define existing terms
differently to everyone else, classic communication poor practice.

Being one who also repairs stuff, I am fully aware that the colloquial
use of "fault" is far less specific than that when used in engineering
and standards documentation for electrical systems.

No, the usage of 'fault' to mean zero ohm short only is specific to UK wiring regs not specific to engineering.

The UK wiring regs don't use "Fault" to mean zero ohm.

"Fault Current", is a specialist English and an engineering term used
by many, not only in the UK.

AIUI fault current does mean the current resulting from a zero ohm connection from live to not live.


However if you are
going to have a meaningful discussion on fusing etc, it is quite
important that everyone uses a consistent set of terms when it matters.

Good luck with that

Make up your own terms if you like, if you think it will help.

No need. 'Fault' is in widespread use to mean any failure, including in engineering.


NT