so that the Electrical Trainee's can get 2 poorly tightened screws instead of 1.?
Discuss Are smart meters to blame for house fires? in the Security Alarms, Door Entry and CCTV (Public) area at ElectriciansForums.net
Oi, I resemble that remark!!! It takes skill to get the screw just the right amount of untightness (if that's even a word...)...
Six reasons to say no to a smart meter - http://www.msn.com/en-gb/money/personalfinance/six-reasons-to-say-no-to-a-smart-meter/ar-AAphVlz?li=AAnZ9Ug&ocid=mailsignout
Guess an answer to the comment in the last line
Guess an answer to the comment in the last line
And we also don't know if the quality of these units are up to scratch ?
They always go for the cheapest option
which usually means tight technical margins.
They always go for the cheapest option
which usually means tight technical margins.
Why did they choose to use a 3mm allen screw? That is so small compared to the size of conductor.
This is the problem they know the other word too well .
Accounants and being tight !
That'll be 3mm allen key for a 6mm screw.
The same 3mm allen screws are fitted to the new Wylex switchfuses. I have a 60A one here. I've just stuck a bit of 25mm in the terminal and tightened the 2 screws. The screws are too small compared to the size of cable entry hole so several of the strands have gone up the side of the screw and are not clamped at all.
![[ElectriciansForums.net] Are smart meters to blame for house fires?](https://electricians.s3.eu-west-1.amazonaws.com/data/attachments/28/28510-a76558eac0762828c922310a8e78427e.jpg "[ElectriciansForums.net] Are smart meters to blame for house fires?")
With 16mm it was even worse, only 2 strands were gripped.
![[ElectriciansForums.net] Are smart meters to blame for house fires?](https://electricians.s3.eu-west-1.amazonaws.com/data/attachments/28/28511-be489491ca35636f38b753cdb1ded9fa.jpg "[ElectriciansForums.net] Are smart meters to blame for house fires?")
Tightly twisting the strands got a better result, but if the cable was moved at all it immediately became loose at both terminal screws. In the 2 photos above moving the cable didn't loosen the strands that were secured by the terminal screws.
In an old Wylex switchfuse the twin screw supply terminals have the terminal screw threads almost touching the side of the terminal hole so the strands can't go up the sides, exactly as it should be IMO.
![[ElectriciansForums.net] Are smart meters to blame for house fires?](https://electricians.s3.eu-west-1.amazonaws.com/data/attachments/28/28512-9c3dbe6c6531b91e25816f35956e4822.jpg "[ElectriciansForums.net] Are smart meters to blame for house fires?")
With 16mm it was even worse, only 2 strands were gripped.
Tightly twisting the strands got a better result, but if the cable was moved at all it immediately became loose at both terminal screws. In the 2 photos above moving the cable didn't loosen the strands that were secured by the terminal screws.
In an old Wylex switchfuse the twin screw supply terminals have the terminal screw threads almost touching the side of the terminal hole so the strands can't go up the sides, exactly as it should be IMO.
Sounds like a way to boost crimp tool sales ,
and appropriate ends ,in assorted sizes !
(just like another tax)
Reply to Are smart meters to blame for house fires? in the Security Alarms, Door Entry and CCTV (Public) area at ElectriciansForums.net
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