MECHANICAL CONNECTORS Mains branch connections WM1, WM2 & WM3 Connectors Principle Application Stranded sector shaped conductors in the following ranges: Range Core c.s.a. (mm²) Connector reference Approx Unit Wt. (gms) Branch Mains min. max. min. max. WM1 16* 95 16* 95 120 WM2 50 185 50 185 200 WM3 120 300 120 300 315 The Hepworth WM range of mains branch connectors has been designed to accommodate three or four core sector shaped stranded conductors in the ranges specified above. The connector employs the proven shear-head screw principle to ensure that a consistent and reliable connection is achieved. Fitting is completed by the use of orthodox hand tools only, and no specialised equipment or techniques are required. Each connector is supplied in a sealed pack together with fitting instructions, details of which are included in the technical data overleaf. Secondary Application These connectors can accept stranded circular conductors to BS 6360 (copper) and BS 6791 (aluminium) in the main and/or branch sides of the connector in the following ranges: - Core c.s.a. (mm²) Reference Code Branch Mains min. max. min. max. WM1 16 70 16 70 WM2 50 150 50 150 WM3 120 240 120 240 www.cablejoints.co.uk Thorne and Derrick UK Tel 0044 191 490 1547 Fax 0044 191 477 5371 Tel 0044 117 977 4647 Fax 0044 117 9775582 www.thorneandderrick.co.uk MECHANICAL CONNECTORS Mains branch connections WM1, WM2 & WM3 Connectors Physical Dimensions Dimensions (mm) Ref. Code A B C D WM 41 40 34 13 WM2 50 50 41 17 WM3 59 60 49 17 Material Aluminium Alloy. Fitting Instructions Separate the main cable cores sufficiently to allow the yoke section to be fitted around the conductor and strip the insulation from the core equal to the connector length plus 5 mm. Thoroughly abrade the exposed conductor and loosely assemble one side of the connector around the core by fitting the bridge piece, inserting the pressure pad and tightening the main screws until the connector is positively located. Set and locate the branch core, then cut to length, strip insulation to suit and thoroughly abrade the exposed conductor before assembling into the connector as described above. Complete the operation by tightening down the mains screws consecutively, one turn at a time, until both heads shear, then repeating the operation for the branch screws. It is suggested that conductors below the minimum range requirements of 16 mm2 are doubled and, if needed, redoubled to achieve the required cross-sectional area and, if copper conductors are to be jointed, they should be wrapped in brass gauze in order to improve the electrical stability of the interface connection. ©COPYRIGHT Sicame Electrical Developments Ltd operates a continuous product design development and improvement programme and offers active co-operation establishing satisfactory procedures and systems to meet new or unusual jointing situations. The company reserves the right to introduce modifications to the above designs and specifications without prior notice.