British engineering standards association

The British Engineering Standards Association has recently issued a revision of British Standard Specification No. 91 electric cable soldering sockets for cables from 0.003 to 1 sq. in. sectional area. The design and dimensions of cast and tubular sockets have not been altered as compared with the previous edition of the specification, but an important modification has been made in that hot-pressed sockets are now recognised as standard, whereas formerly cast sockets and tubular sockets were the only types recognised as standard. The material for the manufacture of hot-pressed sockets is specified, as are also the dimensions. A useful feature of the revised specification is the insertion of tables giving the approximate current (at the Institute Electrical Engineer's rating) of the largest conductor for which the different sizes of socket is suitable. A new appendix has been added to the specification, giving the International Standards of resistance for copper.