There are four pins here. Pin 1 and 4 carry the power for example, to charge your phone , pins 2 and 3 are used for data transfer like sending photos. Especially in cheaper cables, that you might get when ordering stuff from sites like AliExpress, these wires might be missing to reduce cost.
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Have you ever wondered about the effects of running Ethernet cable next to power cable? How about running your Ethernet cable next to discreet individual high interference items like generators or fluorescent light fixtures? For 12V CAN bus there is usually no good reason to separate data lines from device's own power lines. Any certified CAN device has to pass the test for immunity to coupled transient noise ISO or similar , which specifies quite harsh conditions such as repetitive high frequency disturbance e.
Arguably this is much worse than the noise of the power lines of your own device, so if you manage to certify your device for car use, it will have enough immunity so that your own 12V power cable in the vicinity will not be a problem. There's one exception to the Code. If the comms circuit, from stem to stern, end to end all the way, is insulated to Mains Class 1 wiring standards, including the equipment at the points of use , then yeah, that mains-insulated comms wiring can intermix with mains.
Some examples:. That "exit" is the thing you cannot do. Let's run an example: high frequency Power Wiring trash 0. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Is it necessary to separate DC power cables and data cables? Ask Question.
Asked 2 years, 8 months ago. Active 2 years, 8 months ago. Viewed 9k times. Shibalicious Shibalicious 6 6 silver badges 19 19 bronze badges. If so, pulling them apart is just constructing a large loop antenna.
AC is sinusoidal for a reason. They say the line will not interfere with train electronics since it is DC. For example, the light collar for the dog via mini fans. For such gadgets, pure charging cables are perfectly adequate. Externally, the two types of cables are usually indistinguishable.
But with a little trick you can quickly find out which cable it is. To do this, connect your smartphone to your PC with the cable.
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