What white wire to connect to neutral and live

[krugger59]

What white wire to connect to live and neutral

 

[CountryFan]

Edited. Obviously me talking bollards.

 

[Scally-Ho]

In theory it doesn't matter, because on an A/C supply, the polarity of the incomer is changing around 50 times every second; hence the name, alternating current supply
If that were my little power supply, I'd fit a double pole switch as the isolator.

 

[Ragnar_AT]

Doesn’t matter, the AC is immediately rectified and turned into DC. AC polarity really only matters in a few specific cases, e.g. upstream of single-pole switches (like light switches), fuses, and with Edison lamp holders. Some complex circuits in older gas boilers also rely on correct polarity, in that instance it’s a functional rather than a safety issue though. If connected the wrong way, the boiler doesn’t work.

 

[morqthana]

Didn't some old TVs have N connected to the chassis?

 

[Ragnar_AT]

Didn't some old TVs have N connected to the chassis?

They did, as did AC/DC valve radios, but they were required to be insulated to a degree that made touching the chassis impossible. Even the various inputs and outputs were often connected via safety capacitors.

 

[BS3036]

but they were required to be insulated to a degree that made touching the chassis impossible

Mmm... My son recently acquired one of those radios. The grub screws on the control knobs were easily accessible and connected directly to the chassis.

 

[Jurassicspark]

I hope the two wires haven’t been salvaged from any other extraneous device, deviating from their intended use in AC, and used here.

 

[Ragnar_AT]

Mmm... My son recently acquired one of those radios. The grub screws on the control knobs were easily accessible and connected directly to the chassis.

Not ideal. Continental ones had some kind of potting compound over the screws.