Wrapped terminal

This technique permits very high wiring density and takes over where other techniques would take up too much space and are not practical. As a result of this technique, there is a great time saving factor and cost per connection is relatively low when large numbers of connections have to be made.

When wires are correctly wrapped onto a precisely made rectangular post, produced to the recommended specifications, the following is achieved:

A low resistance, mechanically strong and highly reliable connection which is unaffected by normal climatic or temperature changes.

Production of wrapped connections and associated material are defined in IEC 60512-2.

Wrapping techniques

Standard wrap

Only the non-insulated part of the wire is wrapped around the post. This means that the size of the wrapped connection is kept to the very minimum.

Modified wrap

The top part of the wrapped connection is made using the cable conductor as previously, but an extra turn is made at the bottom and for this turn insulation is also wrapped around the post to give great mechanical strength to the joint, and also provide some insulation between adjacent posts.

Wrapping tools

To produce precise wrapped connections a special wrapping tool must be used. This can be pneumatic, electric or hand operated. These tools have interchangeable wrapping heads and sleeves to suit the particular size of the wrap post being used.

These wrapping tools accessories are designed to suit not only the size of post being used but one must also carefully select the correct items for the conductor and insulation size of the wire to be used.

The adjacent table shows commonly used combinations of wire sizes and wrap post. For recommendations on the correct tools, wrapping heads and sleeves to be used on a particular application, we recommend that customers contact the local HARTING sales office.