This may be the first circuit diagram created by yourself. 100 V AC means an alternating current of 100 V and commonly used in households in Japan. The vertically-extended lines on right and left represent power lines.
MCCB stands for Molded Case Circuit Breaker. When MCCB is turned on, the two power lines are conducted with each line above them.
The symbol formed by a rectangle and F located on the left line represents the enclosed fuse.
The symbol formed by O and X at the bottom center represents the lamp. In this diagram, the code C2 (color code No. 2) is described to clearly indicate that the lamp is red.
C2 : Red
C3 : Orange
C4 : Yellow
C5 : Green
C6 : Blue
C9 : White
The cable numbers 1 and 2 are indicated near the lines.
Key point
In the circuit diagram, one wiring cable is used on each of right and left sides. With an alternating current, the current flows from right to left and from left to right, alternately. This alternate flow repeats 60 times per second and is expressed in Hz (Hertz) (60 Hz for western Japan, 50 Hz for eastern Japan). This is called the power supply frequency.
Lamps have a specific rated power supply. In Japan, lamps with a rated power supply of 100 V are used. In addition, electric devices have a specific rated voltage. For example, a 12 V DC motor cannot be used with the household power supply. Various ratings are specified to protect devices and power supply equipment.
Circuit diagram
This may be the first circuit diagram created by yourself. 100 V AC means an alternating current of 100 V and commonly used in households in Japan. The vertically-extended lines on right and left represent power lines.
MCCB stands for Molded Case Circuit Breaker. When MCCB is turned on, the two power lines are conducted with each line above them.
The symbol formed by a rectangle and F located on the left line represents the enclosed fuse.
The symbol formed by O and X at the bottom center represents the lamp. In this diagram, the code C2 (color code No. 2) is described to clearly indicate that the lamp is red.
The cable numbers 1 and 2 are indicated near the lines.
Key point
In the circuit diagram, one wiring cable is used on each of right and left sides. With an alternating current, the current flows from right to left and from left to right, alternately. This alternate flow repeats 60 times per second and is expressed in Hz (Hertz) (60 Hz for western Japan, 50 Hz for eastern Japan). This is called the power supply frequency.
Lamps have a specific rated power supply. In Japan, lamps with a rated power supply of 100 V are used. In addition, electric devices have a specific rated voltage. For example, a 12 V DC motor cannot be used with the household power supply. Various ratings are specified to protect devices and power supply equipment.