When assembling electrical wiring, what is the small circle on the wire?
When assembling electrical wiring, the small circle on the wire sets the number tube. Use the number tube on the wire and cable and its insulated wire core with the text, letters, symbols, colors, etc. marked different cables, as a recognition mark to ensure that the correct connection of wire and cable, installation and safe operation; and easy maintenance.
There are hdmi switch gigabit converter, both sides of the installed one on the line
KVV22-450 / 750V armored control cable 2 is two 4 * 25 is a cable containing four 25mm2 wires
The essence of this problem is: how to interpret "Ming Fu 1KV and below the power and control cables, and more than 1KV power cable should be laid separately" I think: the wire is generally laying with a trunking or threading pipe, and low-voltage cable from the bridge, tray, trunking and threading laying, wire and low voltage cable voltage levels are below 1KV, therefore, from the normative point of view, And low-voltage cables can be laid in a trunking, if from the maintenance point of view, and so other aspects of consideration is another matter.
