Monitor electricians questions and ask for answers

1) There is no positive or negative in the line itself.

2) Is it true that the red must be positive and the black must be negative? No, but the convention has become, red is positive, black is negative. And the traffic light red light stops, and the green light line has a meaning.

3) Or is the color of the insulation layer on the surface of the wire just convenient for others to distinguish? No, there is a national standard for the use of cable color.

4) That is to say, can I use the black wire to connect to the positive pole of the centralized power supply, and the red wire to the negative pole? Yes, but it will be more troublesome for others to check your box in the future, because you are different from what everyone usually knows.

5) The DC wire head has positive and negative, use a multimeter to measure a DC power supply before wiring, + connect the load (wire head) +, connect the load (line head) -, the DC line head of the camera power supply + - You can refer to your manual.

Hope it helps.

1. Connect the red and black two-color power cord of RVB software for centralized power supply, the red must be positive, and the black must be negative, which is the basic principle of electricians.

2. Connect the DC cable head of the camera power supply, this DC cable has two wires, one is pure black, the other is with white edge, the one with white edge must be positive, and the pure black must be negative. As an electrician, this conventional principle cannot be changed casually.

Generally, the connecting wires are connected according to national standards or international standards, the red wire is generally connected to the positive pole, the black wire is connected to the negative pole, and the flower wire is grounded; But there are also those that do not follow the rules, and they are generally the products of small factories and small companies;

For many small Japanese products, it is necessary to wire as required, especially the grounding wire.

Let me give you an analogy! Misconnecting the lines of different colors does not affect its function, just like wearing shoes, the shoes of the left and right feet are reversed, and the same can be walked to keep warm, and the function has not changed! But people will laugh when they see it, and think you're wearing the wrong one.

Because everyone's thinking norms have formed a consensus! Hehe!

RVB software red and black two-color power cable, red to positive, black to negative. The DC line is pure black to the positive electrode, with a white edge to the negative electrode.

The first one is quite professional· I'm not going to plug it in...

Mainly, after you understand the difference between DC and AC, many things will be understood naturally

16 12V2A power supply can be powered in parallel, if you want to standardize, you can buy 16 rail sockets and then buy a rail (the distance can be separated, such as 8 rail sockets in a group, 2 groups are good, so that the power supply can also leave the point distance, and fix the guide rail after installation.

2 Regarding the use of 4 square wires, it would be good if it was a single-strand copper wire, if not, it would not be a big problem, and there was no need to go up to 4 square wires.

3.It is best to install heat dissipation in a well-ventilated place, and the monitoring is 24 hours a day, and it is not good if it is placed in a closed place.

1. The practice is completely correct, cut off all the two-hole plugs at the inlet end of the 16 power supplies, and screw the wires together to connect to the 220V power supply. 2, the nominal 2a actually only uses about 1a, 16 only 16a, the square line is enough.

3. Regarding the calorific value, there will indeed be some, but the problem is not big, but this is also no way, it will not be bad immediately, and the high temperature is not always a good thing, there are two plans: a, try to spread it out, put it in a ventilated place, and do not have a cane stall on it. B, buy a small fan or a 12V meter fan on the computer to blow on, the effect is very good, 12V can be obtained on any of the 16 power supplies.

Replace the switching power supply, 3 is enough, and then use an indoor electrical box Beautiful and practical,