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Don’t Hide from HID

Don’t Hide from HID

LED lighting systems have understandably garnered much attention over the past few years. But this does not mean other types of lighting are poor choices. A case in point is High Intensity Discharge (HID) lighting. Generally, it is a poor choice if you are going with a magnetic ballast version in a lighting refit or […]

Neon Signs and Lighting, Part 5

Neon Signs and Lighting, Part 5

Neon secondary circuits over 1000V have stringent requirements for conductor separation. You must leave at least 1.5 inches between each of these conductors, and between any of these conductors and all objects (other than insulators or neon tubing [600.32(F)]). You must use insulators and bushings that are listed for use with neon secondary circuits over […]

Motor Disconnects, Part 3

Motor Disconnects, Part 3

Can you wire a motor disconnect so one pole disconnects a permanently grounded conductor? Yes, but only if the disconnect simultaneously opens all circuit conductors [430.105]. It’s important to clarify what the NEC means by “grounded conductor.” This isn’t the “grounding conductor,” which there’s no need to open. A grounding conductor connects non-current carrying metal […]

Shock Prevention

Shock Prevention

Electrocution is the third leading cause of death on construction sites, and it’s still a huge problem in commercial and industrial settings. The “shocking” news here is OSHA records show the typical electrocution was preceded by multiple safety violations. That is, it’s not that Bob died because he didn’t use a GFCI. He also wasn’t […]

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 […]