It depends on what country and when the installation was made.
This is because rules and regulations differ between countries and change over time.
The black wire is in other words not always connected to the same thing.
Contact a local electrician.
Automotive : negative ( ground ) side Household : common ( hot ) side
The power of a three-phase load is the sum of the three individual loads. It makes no difference whether they are connected in star (wye) or in delta.
The international shore connection is a standardised system to connect ships of all flags to the shore when in worldwide whichever port. Main purposes are twofold: either to have from shore (electrical) power supply, intake of potable water, bunkering (fuel, oil, ...) or to dispose ashore used oil or black water.
the black wire or yellow wire are not connected right
Yes, typically the black wire is connected to the gold screw (hot) and the white wire is connected to the silver screw (neutral) on a light fixture. It is important to ensure that the power is turned off before making any connections for safety.
In Canada the phase sequence colours are A = red, B = black and C = blue. As for CCW rotation on a three phase electrical power system I presume that you are talking about motor connections. There are meters that can be connected to the motor not connected to the system. You just spin the rotor in the direction that you want the motor to run when connected and the meter will tell you what the connection will be to the power system to obtain that direction. Be it ABC or CBA.
A power outlet can be wired int a cigarette lighter. The wires will have to be cut, with the power off. Then the wires will need to be connected back together while adding the power outlet wires. The Connection will have to be a proper connection, preferably with crimp connectors.
In a circuit, the line connection carries the electrical current from the power source to the light switch, while the load connection carries the current from the light switch to the light fixture. The line connection is typically connected to the hot wire, while the load connection is connected to the wire that leads to the light fixture.
The neutral wire and power wire are never connected together.
Printers can be used via wireless connection or USB connection, but must be connected to the pc somehow, so if there is no corded connection, you must create a wireless connection. The printer must have a power source, as well as materials to print on.
In both ATX and BTX power supplies, the remote switch wire from the case must be connected to the motherboard's power switch header or pins. This connection allows the power supply to be turned on/off using the computer's power button.
For a standard switch, it doesn't matter. If it's a 3 way switch, "hot" is connected to the "common" connection.