What are the general voltage and current limitations on cables for electrical installations involving network cabling, low-voltage control systems, occupancy sensors and power over ethernet (PoE) cables? Refer to the National Electrical Code and other industry literature to perform a safe, efficient installation.
National Electrical Code
Chapter 6, Special Equipment, addresses equipment installations such as fire pumps, electric signs, elevators and electric vehicle supply equipment (EVSE). In addition to the electrical general installation rules, Chapter 6 requirements often modify general rules in a more restrictive fashion.
How well do you know the characteristics for application and selection of fire alarm notification appliances? Try this quiz and see how well you know them.
Winter is in full swing. Take precautions to keep everyone safe inside by ensuring the carbon monoxide alarm is monitoring gas- or wood-burning fireplaces and stoves. Stay safe on the road with proper snow- and ice-rated tires and an emergency kit, and top up antifreeze and windshield wiper fluid to maximize visibility. Staying safe in winter is a full-time activity.
Fiber optic communications has been around so long that we don’t think much about how it got started and developed into the powerful communications systems of today. Let’s test your knowledge of fiber optics history (and give you some trivia to impress your colleagues with).
Understanding OSHA regulations is a constant challenge, and navigating OSHA requirements when dealing with a citation is critical to an investigation’s outcome. With penalties increasing in recent years, it is important to understand the monetary impact on an employer and how it can affect them if a second violation or citation is received. Managing safety is always important for the employer and employees. How much do you know about violations?
We’re always talking about how fast fiber optic networks are, but “fast” has several meanings. How well do you understand fast in fiber optics?
National Electrical Code
Conductors and equipment covered by the NEC are acceptable only if the authority having jurisdiction (AHJ) approves them. Certified (listed) electrical products and equipment often serve as the AHJ’s basis for approval. A product must be listed where the NEC includes a requirement that equipment be listed. Are you familiar with other installation factors that the AHJ will verify in the approval process?
How well do you know the inspection and testing requirements for fire sprinklers connected to a fire alarm system? Take this quiz to find out.
We’re bombarded by news of fiber optic networks—fiber to the home, 5G cellular backhaul, data centers and more. Managers involved with designing, installing and operating these networks need to be familiar with them. How well do you understand fiber optic networks?