Electrical Wiring Socket Diagram - Electrical Training Equipment Electrical Engineering Equipments are sought for all engineering related operations. They have wide range of applications and simplify the complexities to great extent.. McMaster-Carr is the complete source for your plant with over 570,000 products. 98% of products ordered ship from stock and deliver same or next day.. Booster Network Wiring. INFORMATION #4-1: Function of Each Wire in Digitrax' Loconet. Wire 3 and 4 is the LocoNet signal. In Digitrax supplied cables, these wires are red & green..