A Practical Guide to the Testing of Insulated Wires and Cables

adjustable coils adjustable resistance coils astatic average insulation battery key battery power binding-post brass blocks capacity per mile capacity tests charge Chatterton's Compound clamp conductor resistance convenient deflection obtained diagram dial bridge dielectric discharge key divided double binding posts earth connections earth plate Electrical electrification factory farad GALV galva galvanom galvanometer constant galvanometer reverser give GUTTA PERCHA hard rubber pillars inductive capacity insulation per mile insulation resistance joint capacity lead leakage Leclanché cells length lever Leyden jar lower contact magnetic measuring the resistance megohms microfarad multiplying value necessary nected needle number of cells ohms overhead line paraffin placed Post-office bridge proportional coils put to earth readings reflecting galvanometer scale screws short circuit key shown in Fig shunt standard condenser submarine cable taking the galvanometer telegraphy telephone cable terminal tery testing battery testing instruments tion trigger unknown resistance unplugged upper contact vanometer Wheatstone bridge wire or cable