Discuss To torque or not to torque that is z question in the Electrical Forum area at ElectriciansForums.net

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so I need to add 1 mcb to a rather old existing mem consumers unit

I have managed to source the mcb via ‘cough’ eBay ‘cough’

But it doesn’t have the manufacture spec installation instructions manual for correct torque

Should I..
A , contact mem helpline for further information
B , wing it and guess the required torque
C , just use a normal Phillips screwdriver and let my wrist do the torquing

Thought ?
 
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I would go for option 'D'
This involves getting hold of a 1/2" drive ratchet with correct bit for the screw and also a 2 to 3 foot long length of scaffolding pole. Make sure that either the ratchet has a rubber handle or you are wearing a pair of rubber gloves though.
 

telectrix

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option E....... use a hammer.
 

ipf

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I'd go for option F...…..get some cocky SCOUSE sod to do the tightening for me.
 

telectrix

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Pete999

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so I need to add 1 mcb to a rather old existing mem consumers unit

I have managed to source the mcb via ‘cough’ eBay ‘cough’

But it doesn’t have the manufacture spec installation instructions manual for correct torque

Should I..
A , contact mem helpline for further information
B , wing it and guess the required torque
C , just use a normal Phillips screwdriver and let my wrist do the torquing

Thought ?
"C"
 

littlespark

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Tighten it until the plastic casing of the mcb goes crack.
Then go back onto eBay, buy another to replace the one you just broke and tighten this one up just a little less than the first.
 

telectrix

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but does a C curve MCB require a higher torque than a B curve. after all, it takes more electrons quicker to make it function,
 

darkwood

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I find all this torque somewhat strange, we never had torque info' or tools pushed onto us back in the day, we just learnt what was about right and I have yet to return to any job because I under or over tightened a cable termination.
Is this just another money spinning exercise by the industry or do we really have masses of professionals making bad terminations?
 

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