Category: Copper

Understanding PoE is now crucial for electricians

PoE testers can help electricians to cost-effectively conduct quick, accurate PoE validation, eliminating guesswork while getting the job done faster. In just a few short years the use of PoE has migrated from IT devices into building systems like lighting, HVAC and access control. However, the growth of PoE presents issues for electricians, who may have never had cause to work on anything other than traditional electrical cable infrastructure.

Graybar offering scholarships for construction trades

The Graybar Construction Trades Scholarship is open to high school students and those who recently have earned a high school equivalency diploma (GED, HiSET, TASC), who will enroll full time in a community college or trade school. The goal is to increase awareness of careers in the construction trades and provide the skilled workers vital to the long-term success of the construction industry.

Why Choose an Active Fiber or Hybrid Cable?

For applications requiring long distance distribution, an active fiber/copper hybrid cable can be used as an HMDI extension. This offers all of the benefits of active optical cables without the high cost of glass active fiber cables or the constraints associated with traditional copper cables,allowing users to extend HDMI beyond 25 feet.

Understanding Propagation and Delay Skew in Cable Testing

Delay happens for all signals across all cable types, and propagation delay is the amount of time it takes for a transmitted signal to be received at the other end of the link or channel. The propagation delay in a twisted-pair copper cabling such as Category 6 or 6A is related to the nominal velocity of propagation (NVP), as well as the length of the cable and the operating frequency. You might remember from our previous blog on reading the top of a LinkWare™ report that NVP is used by your tester to calculate the length of the cable.

Deadline extended for entering BICSI’s Cabling Skills Challenge to January 16

The deadline for entering BICSI’s 2020 Cabling Skills challenge has been extended to January 16. Race against the clock and your peers to complete industry tasks and emerge victorious. All current BICSI Installers and Technicians are eligible to enter, and selected competitors will receive a complimentary registration to the 2020 BICSI Winter Conference & Exhibition. Prizes for the Cabling Skills Challenge will be awarded and the grand champion will walk away with $5,000.

How to Test Shield Integrity?

The easiest way to test shield integrity is with a DC continuity test. Put a voltage on the cable at the near end, and if it shows up at the far end, it is assumed to be connected properly. While that is true for the conductors in the cable, it’s not necessarily true for the shield. That’s because the shield is connected to the exterior of the connector, and the connector is in physical contact with the rack panel.