O
Octopus
Pretty much as the title says - lots of us have opinions but seeing as BEAMA seem to have ruled out plastic CU's lets have a poll - so please add your vote:
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Discuss Plastic versas Metal CU's - your chance to vote in the UK Electrical Forum area at ElectriciansForums.net
This 2 screw terminal business....agree. Problems occurred because of change over to mcb's, which only have the one terminal screw, a different type altogether.
'Oh, well we might as well make N and E a row of single screw terms on a sliver of brass ' save a chunk on production cost.....and who even mentioned it at the time?
Yep. Double terminal screws and fixed busbars would sort the issue much better than metal CUs IMO.
mmmm....but, then again, use a correct torque screwdriver and the problem's solved anyway.......my giddy aunt tells me.
If the muppets at BEAMA actually wanted to improve standards they would make the main switch as above compulsory NOW.
Like it!
I still believe the main problem is sparks in a rush getting the busbar in behind the screw, rather than it not being tightened properly, hence fixed busbars being better.
And that's scientifically proven (in 73.67% of cases )the main problem, IMO, is the fact that main switches and RCDs will only accomodate a very short length od conductor in the terminal. anything over 1/4" leaves copper showing. having 2 screws and at least 1/2" of copper in the terminal will cure 75% of the problem.
Have you seen these in city's? I know it's only the main switch with twin screws but it's a start in the correct direction. Also the circular terminal is better IMO.
I think main switches should have two screws per terminal like in meters. Loose connections are how most fires start so why not think about how to stop a fire starting rather than how to stop it spreading?
Reply to Plastic versas Metal CU's - your chance to vote in the UK Electrical Forum area at ElectriciansForums.net