Hi Allan,
1. Upto 80% capacity of your power supply. Max 1 amp per channel on the DC08 constant (or 2 to 3 Amps for a few seconds at a time) and upto 5 amps per controller.
2. Depends on the voltage. 20m is ok for 24v. The longer the length and lower the voltage, the more voltage drop you will get. To minimise voltage drop on long cable runs use thicker cable.
3. You can add wire to the start of the strip to extend. You can also usually solder wire onto the connectors at the end of the strip and add another strip as required. You will need to inject more power to additional strips to ensure constant brightness.
Craig
1. Upto 80% capacity of your power supply. Max 1 amp per channel on the DC08 constant (or 2 to 3 Amps for a few seconds at a time) and upto 5 amps per controller.
2. Depends on the voltage. 20m is ok for 24v. The longer the length and lower the voltage, the more voltage drop you will get. To minimise voltage drop on long cable runs use thicker cable.
3. You can add wire to the start of the strip to extend. You can also usually solder wire onto the connectors at the end of the strip and add another strip as required. You will need to inject more power to additional strips to ensure constant brightness.
Craig