Return to Answer

If the plug of the charger contains three terminals, it may be incorrectly wired, by swapping ground and neutral. This is a dangerous configuration to use that also may or may not work, depending on what the installation does with the ground wire. Ground and neutral wires should not actually be connected right at the socket or nearby, but they are often connected at the final step-down transformer of the supply. Some particular socket may not have ground connected at all so this explains why the wrongly wired plug works on some sockets and not others.

It may be the case if the plug has been manually replaced, cutting away a plug from one country and screwing on a different plug for another.

If the power cable of the charger can be disconnected from the charger and there is a replacement at hand, I would suggest to try with another cable.

This should not be directly relevant to the noise. It may be two independent issues.

It may be miswired plug.

If the plug of the charger contains three terminals, it may be incorrectly wired, by swapping ground and neutral. This is a dangerous configuration to use that also may or may not work, depending on what the installation does with the ground wire. Ground and neutral wires should not actually be connected right at the socket or nearby, but they are often connected at the final step-down transformer of the supply. Some particular socket may not have ground connected at all so this explains why the wrongly wired plug works on some sockets and not others.

It may be the case if the plug has been manually replaced, cutting away a plug from one country and screwing on a different plug for another.

If the power cable of the charger can be disconnected from the charger and there is a replacement at hand, I would suggest to try with another cable.

While in the simplest case ground and neutral are simply connected together at the system neutral point, it may be more complex safety devices installed there that could interfere with the voltage converter of the battery charger, causing it overheat, produce the excess noise or simply prevent from working.

If the plug of the charger contains three terminals, it may be incorrectly wired, by swapping ground and neutral. This is a dangerous configuration to use that also may or may not work, depending on what the installation does with the ground wire. Ground and neutral wires should not actually be connected right at the socket or nearby, but they are often connected at the final step-down transformer of the supply. Some particular socket may not have ground connected at all so this explains why the wrongly wired plug works on some sockets and not others.

It may be the case if the plug has been manually replaced, cutting away a plug from one country and screwing on a different plug for another.

If the power cable of the charger can be disconnected from the charger and there is a replacement at hand, I would suggest to try with another cable.

If the plug of the charger contains three terminals, it may be incorrectly wired, by swapping ground and neutral. This is a dangerous configuration to use that also may or may not work, depending on what the installation does with the ground wire. Ground and neutral wires should not actually be connected right at the socket or nearby, but they are often connected at the final step-down transformer of the supply. Some particular socket may not have ground connected at all so this explains why the wrongly wired plug works on some sockets and not others.

It may be the case if the plug has been manually replaced, cutting away a plug from one country and screwing on a different plug for another.

If the power cable of the charger can be disconnected from the charger and there is a replacement at hand, I would suggest to try with another cable.

This should not be directly relevant to the noise. It may be two independent issues.

If the plug of the charger contains three terminals, it may be incorrectly wired, by swapping ground and neutral. This is a dangerous configuration to use that also may or may not work, depending on what the installation does with the ground wire. Ground and neutral wires should not actually be connected right at the socket or nearby, but they are often connected at the final step-down transformer of the supply. Some particular socket may not have ground connected at all so this explains why the wrongly wired plug works on some sockets and not others.

It may be the case if the plug has been manually replaced, cutting away a plug from one country and screwing on a different plug for another.

If the plug of the charger contains three terminals, it may be incorrectly wired, by swapping ground and neutral. This is a dangerous configuration to use that also may or may not work, depending on what the installation does with the ground wire. Ground and neutral wires should not actually be connected right at the socket or nearby, but they are often connected at the final step-down transformer of the supply. Some particular socket may not have ground connected at all so this explains why the wrongly wired plug works on some sockets and not others.

It may be the case if the plug has been manually replaced, cutting away a plug from one country and screwing on a different plug for another.

If the power cable of the charger can be disconnected from the charger and there is a replacement at hand, I would suggest to try with another cable.