12 AWG Flexible Wire Pair for Power Supply and Controller – 70cm

Pair of flexible 12 AWG wires, one red and one black, prepared for making power connections between a DC power supply and the controller board of a 3D printer, CNC machine or another electronic project.

Each conductor is approximately 70cm long and uses stranded tinned copper with flexible silicone insulation. The ends are supplied stripped and pre-tinned, making them easy to identify and prepare for installation.

Main features

• Quantity: 2 separate wires.
• Colours: 1 red and 1 black.
• Wire gauge: 12 AWG.
• Approximate nominal cross-sectional area: 3.31mm².
• Length of each wire: approximately 70cm.
• Conductor: stranded tinned copper.
• Insulation: flexible silicone.
• Indicated conductor diameter: approximately 2.25mm.
• Supplied termination: stripped and pre-tinned ends.

Typical applications

• Connection between a power supply and a controller board.
• Powering RAMPS electronics and other boards with terminal-block inputs, provided that they accept this wire size.
• Internal wiring in 3D printers and CNC machines.
• Low-voltage wiring for robotics, automation and power-electronics projects.

Compatibility

The pair was originally prepared for connecting a power supply to RAMPS electronics, but it can also be used with other DC boards and systems when their terminals accept 12 AWG wire and the electrical design is suitable.

Compatibility should not be assumed simply because a board operates at 12 or 24V. Check circuit current, required length, polarity, terminal wire-size range and connector capacity before installation.

Safe installation

• Disconnect the power supply from mains power and allow its capacitors to discharge before handling the wiring.
• Check polarity at both ends before applying power.
• Make sure that no copper strands remain outside the terminal.
• Tighten the terminals according to the power-supply and controller manufacturers’ instructions.
• Perform an initial test and check that the connections do not become hot during operation.

The ends are supplied pre-tinned. For a permanent power connection in a screw terminal, check the terminal manufacturer’s recommendations. Where appropriate, it may be preferable to cut off the tinned section and fit a correctly crimped ferrule, as solder can deform over time and reduce contact pressure.

Choosing the wire size

Permissible current depends on cable length, voltage drop, temperature, ventilation, bundling and the terminals being used. For this reason, no universal maximum-current rating is assigned to this wire pair.

When the circuit is designed for a smaller wire size, the 50cm 16 AWG flexible wire pair with pin terminals is also available.

Individual wires

• 12 AWG red flexible wire, 1 metre.
• 12 AWG black flexible wire, 1 metre.

Package contents

• 1 × Red 12 AWG flexible wire, approximately 70cm long.
• 1 × Black 12 AWG flexible wire, approximately 70cm long.