While I am asking basic question - here is 1 more

[Inteificio]

What protection does a CU main switch offer?

Is it just a switch or does it offer overload protection too?


I have asked a few sparks, and every one said it offers overload.
When pressed for what would cause it to disconnect they did not know.

So anyone know anything about this?

 

[D Skelton]

Just be careful as this question was asked a few months ago and a couple of members got a ban for having a go at the OP for not knowing this.

That was meeeeee

The OP, not the banned lol.

At least it wasn't only me! There are other sparks out there that aren't exactly sure!

 

[D Skelton]

Thanks,

I was working a couple of months back and realized it was something I did not know that I really really should.

I asked the guy I was apprenticed too, Mr 2391, experience is everything and he said it had overload.
As on principle I do not trust a word he says thought it would be an idea to double check, it took me this long to remember when I was next to a PC.

This guy is head of an electrical engineering department, he couldn't even do a cable calc and thought that it was dangerous to check voltage between phases.

This is one of the reasons there are MAJOR gaps in my knowledge!

One more gap filled =-)

There's never anything wrong with filling gaps in your knowledge, no matter how qualified you may be! I hold a 2391 and even I didn't know this until a few months back all because I was never taught about it when I was at college.

No one is perfect and I commend you for coming onto a public forum full of experienced sparks and risking a ribbing to ask a basic yet important question!

 

[trev]

There's never anything wrong with filling gaps in your knowledge, no matter how qualified you may be!

No one is perfect and I commend you for coming onto a public forum full of experienced sparks to ask a basic yet important question!

It takes guts to do it the way some have been reacting on here of late

 

[Knobhead]

For once the Americans have got it right. A switch disconnect.
Off load operation only, there is an another the Americanism I was taught as an apprentice, “never operate a switch with you’re body in front of it”. They refer to it as the left hand rule.

 

[Top Cat]

For once the Americans have got it right. A switch disconnect.
Off load operation only, there is an another the Americanism I was taught as an apprentice, “never operate a switch with you’re body in front of it”. They refer to it as the left hand rule.

Or the "long stick" switch on!

 

[Knobhead]

One reason I liked the old GEC OCB’s. You could tie a lanyard to the “pull to close” loop.
Bit of rope tied on and clear off well out of the way and pull!

 

[Top Cat]

One reason I liked the old GEC OCB’s. You could tie a lanyard to the “pull to close” loop.
Bit of rope tied on and clear off well out of the way and pull!

People don't realise the power of a direct L - N fault until you see it yourself, then you have respect!