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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 […]

LED Design Options, Part 1

LED Design Options, Part 1

Look around at any installed fluorescent or incandescent lighting system and there is probably an LED equivalent. The sheer number of LED products that have hit the market in the past year is breathtaking. And these are not just LED retrofit lamps. For example, instead of installing T-8 fluorescent fixtures (with ballasts, lamps, and lenses), […]

An Ounce of Prevention, Part 3

An Ounce of Prevention, Part 3

As noted in part 2, the smartest thing you can do about fires is prevent them. Controlling flammables is a key part of good fire prevention. Fuel is a flammable that can easily get out of control. The need to power a portable generator is common, for example when doing work on service switchgear. Depending […]

Neon Signs and Lighting, Part 3

Neon Signs and Lighting, Part 3

In Part 2, we began looking at requirements for neon installations that operate over 1kV. All conductors for these systems must be [600.32(B)]: Insulated. Listed as gas tube sign and ignition cable GTO. Rated for 5, 10, or 15 kV (depending upon your system voltage). At least 18AWG. Have a minimum temperature rating of 221 […]

An Ounce of Prevention, Part 2

An Ounce of Prevention, Part 2

The smartest thing you can do about fires is prevent them. Oil is prominent in the industrial workplace. Spilled/leaked oil presents three hazards: slipping, toxicity hazard, and fire. The source of an oil puddle is usually a mechanical problem (e.g., damaged seal), but an oil leak/spill/puddle becomes your problem if you are the first to […]