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LED Design Options, Part 2

LED Design Options, Part 2

LED lighting systems have many advantages, and we started a list of those in Part 1. Here are more: No explosions. Unlike some other types of lamps, LEDs don’t present an explosion risk as they near their end of life. Not that you’re likely to see end of life for any LED you install, but […]

Motor Disconnects, Part 2

Motor Disconnects, Part 2

Any disconnect you use with a motor must open all of the ungrounded supply conductors, and it can’t permit independent operation of any pole [430.103]. Nor can the disconnect be closed automatically. It can, however, be in the same enclosure as the controller. The disconnect must also plainly indicate its position [430.104]. A common means […]

Neon Signs and Lighting, Part 4

Neon Signs and Lighting, Part 4

The typical way to make the nice, neat bends that we see in control cabinet wiring is to grab the wire with needle-nose pliers and use a wrapping motion. You end up with a ninety degree bend on a slightly-rounded curve. But such sharp bends in a neon system could prove disastrous, due to the […]

I’m Shocked, Shocked

I’m Shocked, Shocked

That famous line from Casablanca was uttered by a police officer (Captain Renault) who was closing down Rick’s Cafe. Rick asked on what ground. The line ended with, “…to find that gambling is going on in here.” After he says that, one of Rick’s employees hands him his winnings. The word “ground” came right after […]

Motor Disconnects, Part 1

Motor Disconnects, Part 1

Is the following statement true or false? Every motor must have a disconnect, and that disconnect must be installed within sight of the motor. The statement may sound right, but technically it’s false. The disconnect for the motor controller can serve as the disconnect for the motor [430.102(A) and (C)]. The logic here is that […]