All you need to know about wires (AWG).

Please take a look at this post before extending wires for your laser box or laser control board

So if you want to increase the wire length for the laser box (power) or laser control board we suggest using AWG10 or AWG12.

If you want to extend PWM wires, you can use AWG22 / AWG24 wires.

For AWG12 if you increase a wire length for 1 meter (3.28 feet) you only have and an initial current is 4A and the initial voltage is 4.5V then you have:

Voltage drop: 0.042
Voltage drop percentage: 0.93%
Voltage at the end: 4.458

For AVG14 if you increase a wire length for 1 meter you only have and an initial current is 4A and the initial voltage is 4.5V then you have:

Voltage drop: 0.066
Voltage drop percentage: 1.47%
Voltage at the end: 4.434

For example, if you use very thin wires like AVG24 with the same 4A current and 4.5V

Voltage drop: 0.67
Voltage drop percentage: 14.97%
Voltage at the end: 3.83

Which is too much.

If you have any more questions – please let me know [email protected]

Basic Voltage Drop Law

V_drop = IR

where:
I : the current through the object, measured in amperes
R : the resistance of the wires, measured in ohms

Typical AWG wire sizes