It is a great aid in troubleshooting as it shows, in a simple way, the … Bulletin 509 Sizes 0, 1, 2, 3 81 4 Standard wiring … WIRING DIAGRAMS w 3-Phase Starters Bulletin 505 3 … Wiring Diagrams ww introduction This booklet has been prepared as a guide to some of the useful ways Allen-Bradley’s manual and magnetic across-the-line starters may be applied. It will also serve as a useful aid where simple wiring systems are to be studied. When applying these diagrams, it is well to remember that the features described in

Wiring Diagram Symbols Symbol Symbol Device Fuse General Single Winding I Tapped Relay and Switch Coils Coils NE – Neon FL – Fluorescent –@I- P – Purple OP – Opalescent Permanent Magnet Economized Indicating Lights General Normally Closed (N.C.) 0 – Oranoe … “WIRING DIAGRAMS” vs “LINE DIAGRAMS” Most of the diagrams in this book are shown in two ways. There is a “wiring diagram” and adjacent to it a “line diagram.” Line diagrams are included because their use is becoming more widespread and we believe it is advantageous to learn to use them. Wiring diagrams or connection diagrams include all of the devices in the system and show their physical relation to each other. All poles, terminals, coils, etc. are shown in their proper place on each device. These diagrams are helpful in wiring-up systems, because connections can be made exactly as they are shown on the diagram. In following the electrical sequence of any circuit, however, the wiring diagram does not show the connections in a manner that can be easily followed. For this reason a rearrangement of the circuit elements to form a line diagram is desirable. The line diagram (sometimes referred to as an elementary diagram or a schematic diagram) is a representation of the system showing it in the simplest way. No attempt is made to show the various devices in their actual relative positions. All control devices are shown between vertical lines which represent the source of control power, and circuits are shown connected as directly as possible from one of these lines to the other. All connections are made in such a way that the functioning of the various devices can be easily traced. Note: In this publication the line diagrams show the control circuits only – power circuits are omitted for clarity, since they can be traced readily on the wiring diagrams (heavy lines). A wiring diagram gives the necessary information for actually wiring-up a group of control devices or for physically tracing wires when trouble-shooting is necessary. A line diagram gives the necessary information for easily following the operation of the various devices in the circuit. It is a great aid in troubleshooting as it shows, in a simple way, the effect that opening or closing various contacts has on other devices in the circuit.

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