On 09/04/2021 18:41, ARW wrote:
On 09/04/2021 13:33, Peter Able wrote:
On 09/04/2021 12:38, Roger Hayter wrote:
On 9 Apr 2021 at 11:08:18 BST, ""Dave Plowman" News)"

wrote:

In article ,
Â*Â*Â* ARW wrote:
Â* And the reason I posted is because I found a LN reversal on a socket
Â* during a EICR.

Â* The tenant was adamant a rectifier would not work.

Â* I was convinced it would (even after a bottle wine of when I
posted).

Â* So I asked the collective wisdom of you fine posters.

I'm trying to think of *any* domestic equipment that wouldn't work
if the
line and neutral are reversed?

The exception would be a half-wave rectifier when the 'cold' side of the
rectified supply was earthed.


Such as?Â* I also cannot think of any domestic equipment that wouldn't
work.

That doesn't mean that domestic equipment doesn't reverse what seems
common-sense by design.Â* My gas boiler has all of its electronics
referenced to the LINE potential.

Guess how I found that out !

It would not spark?



No, it was me that sparked when first diagnosing the controller PCB! A
crazy system. From the neutral a 0u68 capacitor then two zeners in
serial-opposition to the LINE. Two diodes picking off the clamped AC to
offer +/- supplies for the electronics.

Needless to say, the capacitor (right on top of the heat-exchanger -
natch) has dropped in value, twice, making the boiler dance a fandango
once the regulator on the electronics plus supply runs out of input voltage.

Cowboys !

PA