{ "item_title" : "The Electrician's Guide to Control Schematics", "item_author" : [" Stan Turkel "], "item_description" : "The print is a map of intent. Learn to read it, and the fault has nowhere to hide. Most electricians can bend pipe, pull wire, and land a motor. Far fewer were ever taught to open a full set of control prints and follow a circuit all the way from the line, through every contact and coil, to the load, and trust what it tells them. That skill is not hard. It is just rarely taught on purpose. This book teaches it on purpose. Written for working electricians, mechanics, and maintenance technicians, this is a field and classroom guide to reading and troubleshooting control schematics. It starts with what a control circuit actually is, works through the symbols and the numbering, goes inside the panel behind the drawing, walks the common circuits you meet every day, and finishes with a method for following a print to a fault and proving it with a meter. It teaches both standards, side by side. Across North America most control drawings follow NEMA conventions. Walk up to an imported packaging line or an OEM skid and the drawing in the door speaks IEC instead: different symbols, different tags, different numbering, different control voltage. This book shows the two together every time they differ, so a coil, a seal-in, or an overload reads the same to you no matter which standard drew it. Inside this guide: The four kinds of drawing, and the question each one answers The NEMA and IEC symbol libraries, taught side by side on facing plates Line numbers, wire numbers, and following a coil to every contact it throws Inside the panel: control power, grounding, fusing, and failing safe Relays, contactors, timers, counters, and the coil spike that kills contacts Three-wire control, hand-off-auto, forward and reverse, jog, and sequencing Reading a circuit for troubleshooting, and walking it with a meter What to do when the print is wrong Every chapter is built on a real job. Twenty-one chapters, an appendix of quick-reference tables, a working glossary, and an index keyed to chapters. Part of Stan Turkel's Troubleshooting Series, written the same way every time: field first, plain language, built on real jobs.", "item_img_path" : "https://covers3.booksamillion.com/covers/bam/9/79/819/058/9798190589986_b.jpg", "price_data" : { "retail_price" : "49.97", "online_price" : "49.97", "our_price" : "49.97", "club_price" : "49.97", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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