Your line is not long enough; you can connect the line at the A. That's the outlet line, so long as it's safe.B is fixed, do not extend the insecurity ha;
This line is best not to do any extension treatment, the cut may be thin after the good connection, you can extend the plug in front of the power line well. No-load voltage is not allowed, as long as the lamp can be used normally, do not measure it.
In general, the high voltage light belt is relatively safe; otherwise, a high pressure are scared, is not.
