This document provides information on Lawson Type J fuse-links that are used in 415V a.c. electricity supply distribution networks. It lists the various current ratings and dimensions of fuse-links that comply with BS88 Part 5 standards as well as some additional non-specified ratings. Performance data is also included, showing the fuse-links have a rated voltage of 415V a.c. and breaking capacity of 80kA, making them suitable for use on systems up to 457V a.c.