Wago 221 Inline Junction Box for flex wire 2 core, 3 core, 4 core or 5 core

Electrical safety warning:

Messing with electrics is dangerous and kills. Please don't attempt to use this junction box if you are not familiar with electric safety procedures and regulations in force in your country. Your safety is not my responsibility.

Description:

I'm noticing that I am prone to making junction boxes for Wago 221 connectors… This one is meant for flex wires (2, 3, 4 and 5 core) using inline connectors.

• Holds regular wago 221 inline connectors (221-2411): https://www.wago.com/gb/installation-terminal-blocks-and-connectors/inline-splicing-connector-with-levers/p/221-2411). The connectors support single core and multi-strand wire, so technically there is no need to add bootlace ferrules. Personally I prefer to have them but I understand there's pros and cons to having them. Your call.

• Cable entry and strain relief mechanism consists of an independent lid with 2 bolts that squeezes the cable's outer insulation against a saw-tooth pattern holding it in place. The cable entry lids are not meant to screw in fully, only squeeze the cable with enough force to hold them in place without damage (see photos). Larger diameter cables will require a larger gap left on the lids

• Models available for 2, 3, 4 or 5 core 1mm2 flex wires (318*Y) with approximate wire hole sizes. Because of the strain relief mechanism, there is some tolerance to the wire diameter.

• The enclosure was designed for multi-strand flexible copper wires on a round external sheeting. It won't work for rigid single core wires due to the entry hole not being suitable for twin&earth (maybe a future variation).

• The centre lid attaches to the box using 4 snap fits. They were designed for a solid fit for infrequent operation, as a junction box is meant to be installed and left alone for long periods of time, usually.

If you would like to view my other enclosures for Wago connectors, please see below:

• Compact 2x M3 screws

• Compact model for 3 wires and Wago 212-413

• Inline enclosure for Wago 212-2411 (this one)

• Inline enclosure for Wago 212-2411 with screw holes

Instructions

1. Fully release the tension relief clamps at either end of the enclosure, lift the lid.

2. Strip and connect one flex ensuring that the tension relief clamp grabs the outer insulation material.

   1. Ensure that the wago connectors sit in their pockets correctly.

   2. Fit that flex wire's tension relief clamp lightly.

3. Strip and connect the opposite flex cable, followed by the opposite tension relief clamp, making sure it fits over the outer insulation of the flex.

   1. Ensure that the wago connectors sit in their pockets correctly.

4. Snug down the tension relief clamps - you do not need to fully tighten them - all they need to do is grab the external insulation so as not to let the flex wires pull on the connectors.

5. Snap-fit the lid in place.

6. Done.

Additional design features

• Cable entry and strain relief mechanism allows for some tolerance in wire diameter

• Strain relief mechanism held with 2x M3 screws and nuts on the underside

• Wago connectors are ‘locked in place’ so they don't move once the lid is placed