Nope. The white things are short pieces of 20mm conduit with a conduit clip to secure the cable. When you do not have the right size clips for securing a cable, here in our valley, you make a plan.
A line tap is used to tap into a line. Mostly used on bare overheads, but we find other uses for them. It's a slotted threaded bar with a nut to fasten the cables being joined. A 10mm line tap can join 3 x 10mm wires easily. If you struggle just go one size up to 16mm and bingo. A easy way to join wires but have enough insulation tape handy.
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