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Topic Title: Over-current protection & the 'fusing factor'.
Topic Summary: Why are we using a 'fusing factor' when calculating the size of RCBOs' and circuit breakers?
Created On: 13 April 2011 03:12 PM
Status: Read Only
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 29 August 2016 11:05 PM
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sparkingchip

Posts: 9974
Joined: 18 January 2003

Reading my own posts again after five years is quite nostalgic, I wonder where I was at the time I posted and what I should have been doing?

We know RnR was on the train, to the rest of us it it a mystery.

Andy
 06 September 2016 11:40 PM
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Zs

Posts: 3814
Joined: 20 July 2006

Great call weirdbeard. A perfect post in amidst the spam attack. Such memories and so evocative.

How far we have all come. Only five years? Seems like a whole career ago that I was glued to this thread and in truth not understanding most of it.

I remember reading DCs posts and seeing the obvious. I remember knowing in my gut that they were so wrong but not being able to explain why they were so wrong. Ha, a bit like the loves of my life

Not this thread really. Rather the ones on the subject of earthing and bonding. Something about peeling back a carpet and testing the earth in a proper dodgy way comes to mind with coins in a pocket and touching radiators.(???)

Well, only this morning I had a chat with the head of the defence guys I work for sometimes. About how the front line workers in there keep asking me why you might get an electric shock ( which they call electrocution) if the handrails are not bonded on the roof where the control boxes are... We are currently gearing up for the Zs presentation about why a bird can sit on a wire etc. Scary stuff for me. This remains my worst subject but hell I'll do it and I won't half be checking my facts out on here before hand.

I have to confess to believing DC911 for a while. Looking back, I know where he was with this. Ahead of me, but wrong. But I sort of know the stage in our electrical learning curve that he was at, if that makes sense? There is a turning point.

I have asked questions and made statements just as dumb on here for years. I thank you for not shooting me down in too many flames. I can just about turn an ear to my advice these days and I didn't get it from books or from being a registered electrician. I got it from reading the diverse conversations on here and then looking things up. I got it from the contacts I have made on here and I thank you.

Makes me realise how much we pack in to five years. I still wouldn't dare write a book about it.


Zs
 07 September 2016 12:20 AM
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mapj1

Posts: 9381
Joined: 22 July 2004

If he had titled his book
"Disconnected (from reality)"
or "Not of this earth"
he might have got away with it.
When you do gain the confidence to write a book, I was reckoning it might be any of the following
titles still missing from the bookshelves.

" Electrons I have Lost" humorous anecdotes about hard to find faults, in a James Herriot "It Should Not Happen to a Vet" style

" The seven ages of testing" A guide to the evolution of testing from actually doing , to supervision through to contract specification"

"Let me through, I'm a Consultant" One of the inner wheels of the machine reveals how to make customers let you tell them what they already knew, and pay you well for it. Companion volume ; how I became a millionaire ovenight by someone you doubt exists.

"How to stay calm when the lights go out" A self help manual and guide to emergency fittings.

" Flying carpets and diverted currents, or why the ground is not quite flat" (with extra chapter about current loops and floating isolation from a former member of the Queens Ganja Rifles) A serious work for the student of class one equipment and ADS.

-------------------------
regards Mike
 07 September 2016 10:05 AM
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OMS

Posts: 22359
Joined: 23 March 2004

"Let me through, I'm a Consultant" One of the inner wheels of the machine reveals how to make customers let you tell them what they already knew, and pay you well for it. Companion volume ; how I became a millionaire ovenight by someone you doubt exists.


Part of the trilogy that starts with:

"If you hand me your watch, I can tell you the time (for a fee)"

and

"If you aren't part of the solution, there's good money to be made prolonging the problem"

Right, I've a report that needs weighing before issue to ensure it reflects the fee I'm charging

Regards

OMS

-------------------------
Let the wind blow you, across a big floor.
IET » Wiring and the regulations » Over-current protection & the 'fusing factor'.

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