Discuss My 1st board on site advice in the UK Electrical Forum area at ElectriciansForums.net
Thanks of the advice guys appreciate it. I strive improve my quality in my work.
My point about ferrules is a must, you're contravening BS7671 not doing. My other points are merely my opinion.
C
Could your link me to the BS7671 requirement please ?
The earthing tail from the MET, is that provided by the manufacturer?
Off the top of my head regulation 526.2 or there about.
Look for fine stranded conductors.
Off the top of my head regulation 526.2 or there about.
Look for fine stranded conductors.
A) Proteus is cheap S***
B) You need ferrules on the end of those neutral fly leads.
C) I don't like to see cable ties holding conductors together in a CU
Although at a quick glance aside from the above. Looks ok
Also could you expand a little on B about the cable ties. I used that for aesthetically purposes.
526.9 Connection of multiwire, fine wire and very fine wire conductors
526.9.1 In order to avoid inappropriate separation or spreading of individual wires of multiwire, fine wire or very fine wire conductors, suitable terminals shall be used or the conductor ends shall be suitably treated.
526.9.2 Soldering (tinning) of the whole conductor end of multiwire, fine wire and very fine wire conductors is not permitted if screw terminals are used.
526.9.3 Soldered (tinned) conductor ends on fine wire and very fine wire conductors are not permissible at connection and junction points which are subject in service to a relative movement between the soldered and the non-soldered part of the conductor.
Ok so for point B regulations:
The cable tie, is purely my opinion, use them to make it tidy and then I would remove, the cables should have been formed into position.
I don't like it as in older bigger DBs with more circuits, especially ones that have been poorly terminated, it's a pain in the --- trying to trace a wire when they're cable tied.
Other people will argue it's not a good idea, as you're bunching conductors together and could potentially cause a hot spot.
Thanks for the reply. I had a read over that regulation you supplied but can’t see how it applies to the neutral fly leads. I would rather not have to go back and install Ferrules. Time consuming. I will if it’s a legal requirement.
Ok so for point B regulations:
The cable tie, is purely my opinion, use them to make it tidy and then I would remove, the cables should have been formed into position.
I don't like it as in older bigger DBs with more circuits, especially ones that have been poorly terminated, it's a pain in the --- trying to trace a wire when they're cable tied.
Other people will argue it's not a good idea, as you're bunching conductors together and could potentially cause a hot spot.
They are fine stranded conductors... (fine wire)
526.9.1 In order to avoid inappropriate separation or spreading of individual wires of multiwire, fine wire or very fine wire conductors, suitable terminals shall be used or the conductor ends shall be suitably treated.
Those terminals in the CU are not spring loaded, so the conductor must be suitably treated. E.g ferruled.
From the factory you will likely notice that the ends before you cut them are ultrasonically welded.
Thanks for the reply. I had a read over that regulation you supplied but can’t see how it applies to the neutral fly leads. I would rather not have to go back and install Ferrules. Time consuming. I will if it’s a legal requirement.
If you don't fit ferrules some of the strands will not make proper contact in the terminal as they are pushed out sideways by the screw.
This leads to overheating and you will be back to replace the higher rated/loaded RCBOs because that connection has failed.
Reply to My 1st board on site advice in the UK Electrical Forum area at ElectriciansForums.net
We get it, advertisements are annoying!
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.