100W lamp and a 500mA fuse.

[bernardgreen]

When cold?

yes, when the lamp is switched off and the filament has cooled to room temperature. It is this resistance that sets the inrush current when the lamp is switched on until the time the filament has become white hot.

 

[Spark123]

Yep, I was questioning the 529Ω figure which is when it is hot which was quoted by Risteard who then said he hadn't read the question. My browser hadn't added your reply when I replied!

 

[RF Lighting]

What was ( is ) the resistance of the cold filament ?

About 40Ω for a 100w 230v lamp.

It's a 240v bulb as can be seen 15 seconds in on the video.

His mains is 248.2v not 230v as many would like to tell us.

My meter I used in the video has nominal voltage indicators on it. It lit the 230V indicator what with me having a 230V nominal supply, just like everyone else.

So why didn't the fuse blow Winston? You assured us all that it would blow every time.

 

[winston1]

It's a 240v bulb as can be seen 15 seconds in on the video.
His mains is 248.2v not 230v as many would like to tell us.

Yes, Winston but his meter does not measure nominal voltage.
It wouldn't be a lot of good if it did, would it?


The abbreviation for voltage is a capital V because it is derived from someone's name.

It wouldn't would it as nominal is (of a role or status) existing in name only.

Thanks for reminding me about Voltaire, it was a nom de plume anyway.

 

[winston1]

What was ( is ) the resistance of the cold filament ?

About 40Ω for a 100w 230v lamp.

It's a 240v bulb as can be seen 15 seconds in on the video.

His mains is 248.2v not 230v as many would like to tell us.

My meter I used in the video has nominal voltage indicators on it. It lit the 230V indicator what with me having a 230V nominal supply, just like everyone else.

So why didn't the fuse blow Winston? You assured us all that it would blow every time.

I can't see any nominal indicators on your meter. Pretty pointless as nominal exists in name only. Everyone else does not have a 230V supply. Ever been to Canada?
Not sure about your fuse, unusual not to blow in the circumstances.

 

[winston1]

And here I frequently measure between 230 and 238 Volts (and typically nearer the 230V end of the spectrum).

I wonder what Winston makes of that?

What I make of it is that you are in a foreign country where things are different. So completely irreverent.

 

[bernardgreen]

it was a nom de plume anyway.

Voltaire was a nom de plume of a French philosopher and writer

Volta was an Italian physicist whose name is honoured by the unit measurement the Volt

 

[RF Lighting]

What was ( is ) the resistance of the cold filament ?

About 40Ω for a 100w 230v lamp.

It's a 240v bulb as can be seen 15 seconds in on the video.

His mains is 248.2v not 230v as many would like to tell us.

My meter I used in the video has nominal voltage indicators on it. It lit the 230V indicator what with me having a 230V nominal supply, just like everyone else.

So why didn't the fuse blow Winston? You assured us all that it would blow every time.

I can't see any nominal indicators on your meter. Pretty pointless as nominal exists in name only. Everyone else does not have a 230V supply. Ever been to Canada?
Not sure about your fuse, unusual not to blow in the circumstances.

Ok Mr pedantic. Everyone else in the United Kingdom.


Here's a close up of my fluke voltage indicators.

Here they are connected to my 230V mains. You can tell by the way the 230V light and all the ones below it are lit.

It's not a precise reading, it's just a guide to what's there, and it doesn't really matter anyway just the same as nominal voltage.

Would you prefer an individual indicator with a lamp for every 0.1 of a volt or something that gives you a nominal figure like in my picture?



I'll tell you why the fuse didn't blow. It's called physics. It was never going to blow. You were wrong as ever, but I'm sure you'll try and think of some ridiculous reason why you weren't.

 

[winston1]

No I prefer the multimeter shown in your post. Tells you the actual voltage instead of saying over 230V and less than 400V.

 

[RF Lighting]

But that's not an approved instrument for proving dead.

 

[Risteard]

Everyone else does not have a 230V supply.

I most certainly do.

 

[Risteard]

completely irreverent.

LOL!

 

[Risteard]

And here I frequently measure between 230 and 238 Volts (and typically nearer the 230V end of the spectrum).

I wonder what Winston makes of that?

What I make of it is that you are in a foreign country where things are different. So completely irreverent.

But we are still subject to the Electricity Safety, Quality and Continuity Regulations (Northern Ireland) 2012.

 

[winston1]

And here I frequently measure between 230 and 238 Volts (and typically nearer the 230V end of the spectrum).

I wonder what Winston makes of that?

What I make of it is that you are in a foreign country where things are different. So completely irreverent.

But we are still subject to the Electricity Safety, Quality and Continuity Regulations (Northern Ireland) 2012.

But you keep insisting you are in Ireland, not NI. But either way still irrelevant as NI was always on 230 volts.

 

[Risteard]

And here I frequently measure between 230 and 238 Volts (and typically nearer the 230V end of the spectrum).

I wonder what Winston makes of that?

What I make of it is that you are in a foreign country where things are different. So completely irreverent.

But we are still subject to the Electricity Safety, Quality and Continuity Regulations (Northern Ireland) 2012.

But you keep insisting you are in Ireland, not NI. But either way still irrelevant as NI was always on 230 volts.

I am in Ireland.

I don't recognise any entity called "Northern Ireland" - but even if I did it wouldn't change the fact that I am in Ireland.

That is a geographical fact. It isn't actually a political statement.