Sign & Digital Graphics

July '17

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32 • July 2017 • S I G N & D I G I T A L G R A P H I C S ELECTRIC SIGNAGE Here are some basic things to know with attachment details with signs. With LED modules, only show one penetra- tion through the wall surface. With a neon glass tube, always show two pen- etrations through a surface wall or fascia (see Figure 6). With an LED attachment detail, a call-out should identify an LED driver as a power supply. A neon attachment detail should call-out a transformer, not a power supply. From my experience, this is the number one incorrect call-out with most attachment details I have seen. The next area to discuss is the most important but also the most intimidating to designers who are not familiar with a basic electric circuit. With a Google search, type in this phrase "basic electric circuit" and you will quickly realize it is simply a power supply and a load resistor. An electric sign circuit is more complex than that, but with sign design, you only need to know the basics of an electric circuit (see Figures 7 & 8). Once a designer draws the electrical part of a drawing and becomes more con- fident with it, the rest of an attachment detail may be learned faster. Remember, you are not going to be perfect with drawing attachment details. One way to learn is through failure. Just draw and fail. This way, if you do fail with some of the details you draw, you will quickly know what not to do. To learn more about this technical draw- ing process to speed up your art department, visit www.SignBusinessBooks.com. Ask for a free sample download of the eBook "How to Draw Attachment Details." SDG Figure G Wall Penetrations Neon: 2 Pre-Drilled Holes Wall Penetration LEDs: 1 Pre-Drilled Hole Figure 6 Figure H To the Sign Low-Voltage Wiring To the Sign To Power Source To Power Source Power Supply Transformer Figure 7 Figure I Path of Electricity Path of Electricity Path of Electricity Path of Electricity Electrical conductor Neutral Wire Electrical conductor Hot Wire Resisting Load: Electric Sign Basic Circuit Resisting Load: Light or Device Basic Circuit Figure 8 A properly drawn attachment detail for an electric sign creates a clear business communication tool (i.e., a drawing) for a city planner to approve, straightaway.

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