WAGO 221 compact case with strain relief

Description

Cable juntion box using the WAGO 221 inline splicing connector.

This is a more advance version of my extension box.

New feratures

• Alllow splitting the connection.
• Allow thicher cables.
• Wall thickness changed from 1.0 mm to 1.2 mm to allow 3 walls of 0.4 mm or 2 walls of 0.6 mm. Thereby supporting both 0.4 and 0.6 nozzle.
• Special versions that supports flat cables down to 3 mm high.
• Added wall in the middle of the lid, to make it stronger.
• Slightly longer to make more room for wires (Pictures do not reflect that yet).

Benefits

• Compact.
• Very strong strain relief.
• Mountable with countersunk screws.
• You can press on the WAGOs to click them in-place, or choose not to.

How to make

• Print in PETG, because it is more fire retardant than ABS or PLA.
• Insert WAGO 221-2401 or WAGO 221-2411 inline splicing connector.
• Secure with M3 screws and nuts. Suggest screws are 10mm, 12mm or 14mm with hex head. Depending of the size of the cable.

Hits

• If your cable is too thick, use a box intended for more wires than what you have.
• If your cable is too thin, use my previous version or the versions desinged for flat cables.

When connection more wires to the same hole

• Use only stranded wires.
• Do not exceed the 4 mm² limit.
• No bare wire exposed.
• All wires must be fully inserted.
• WAGO does not support this usecase, because it is not been proper tested.
  • I suggest you do not use the technique where:
    • A poor connection can cause heat and the a fire. Like for heavy load.
    • A broken connection can cause an unbalance load (open neutral). Like splitting a 3 phase to multiple single phase.

Video