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Control panels - connecting different sized wires

John Mann
Hello All,

I usually work with low-current electronics, however we have a sideline in making motor drive systems. It's usually the case that the main phase inputs need to be spurred off (with suitable fusing of course) to power low-current items like fans and 24V PSUs. Usually this can be done with DIN rail terminals, for example the Weidmuller PDU6/10 can take a 10mm. sq. wire. The terminal can then be cross-connected to another, where a 1.5mm wire can attach.  However, what to do when the phase cables get larger and the size difference is greater than a terminal can accomodate?  We could daisy-chain down through a series of terminals but this seems inelegant. Is there a way this is commonly done in control panels?

Thanks,

John.
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  • Former Community Member
    0 Former Community Member
    Hi John,

    Don't forget though, that you also need to do any safety systems in accordance with the ISO 13849 or 62061 series, and e-stops in accordance with ISO 13850 if your going to go down the route of standards.

    Also if the panels are for machinery, then it's the MD rather than the LVD you need to be looking at.

    There is little in 61439-1 that applies, unless, you are for example designing and building your own copper busbars and supports from first principles & raw materials, only really where 60204-1 calls it up.

    Oh and a lot of hoisting equipment is 60204-32 rather than -1.

    Plus all the others!!! surprise
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  • Former Community Member
    0 Former Community Member
    Hi John,

    Don't forget though, that you also need to do any safety systems in accordance with the ISO 13849 or 62061 series, and e-stops in accordance with ISO 13850 if your going to go down the route of standards.

    Also if the panels are for machinery, then it's the MD rather than the LVD you need to be looking at.

    There is little in 61439-1 that applies, unless, you are for example designing and building your own copper busbars and supports from first principles & raw materials, only really where 60204-1 calls it up.

    Oh and a lot of hoisting equipment is 60204-32 rather than -1.

    Plus all the others!!! surprise
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