How to wire the main power distribution box for surveillance cameras

To wire a CCTV power distribution box, connect each camera's positive and negative leads to the corresponding terminals on the box, ensuring correct polarity and using proper cables like Siamese or DC pigtails.

Choosing the Right Power Supply Box

Select a 12V DC box for most analog and IP cameras, or a 24V AC box for PTZ cameras or higher-power devices . Centralized power boxes simplify maintenance, reduce clutter, and allow easy fuse or PTC reset monitoring .

Wiring Steps

1. Identify Polarity
   • Positive wires are red, negative wires are black .
   • Ensure the camera's power plug matches the box's terminals to prevent damage.
2. Use Proper Cables
   • Siamese coax cable: combines video and power in one cable.
   • DC pigtail: allows direct connection to the camera's power input .
3. Connect to the Power Box
   • Strip the cable ends and attach the red lead to the positive terminal and the black lead to the negative terminal.
   • For multiple cameras, connect each pair of leads to separate terminals or ports on the box .
4. Fuse Protection
   • Use PTC auto-reset fuses or traditional fuses to protect each camera circuit. PTC fuses automatically reset after overloads, preventing burnt-out fuses .
5. Secure and Organize Wiring
   • Use junction boxes, grommets, or conduit to protect wires from weather and tampering .
   • Keep cables neat to simplify troubleshooting and maintenance.
6. Testing
   • Double-check all connections for correct polarity.
   • Power on the box and verify each camera receives stable voltage and functions properly .

Additional Tips

• For IP cameras using PoE, consider using a PoE switch instead of a separate power box for cleaner installation .
• Avoid running power cables near high-voltage lines to reduce interference.
• Label each cable for easier identification during maintenance. By following these steps, you can safely and efficiently wire a power distribution box for multiple surveillance cameras, ensuring reliable operation and simplified system management.