The Key To Successful Home Wiring: THHN Vs. Romex

NM-B-wire

Romex (NM-B) and THHN are the two most common cable types used in residential and commercial wiring. Confusingly, NM-B wire is not very different from THHN wire as far as construction is concerned.
THHN is a cable with a single thermoplastic high heat resistant nylon wire, while NM-B wire is a sheathed cable with multiple conductors.
The conductors within NM-B wire are either insulated or uninsulated, and the former is actually THHN, which often leads to confusion between the two types of cable.

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Global Fiber Optic Blowing Equipment Market to Grow at a CAGR of 4.8%

fibers optic

MarketsandMarkets has published a new research report “Cable Blowing Equipment Market by Power, Cable Type and Region- Global Forecast to 2027”. The report estimates that the fiber optic blowing equipment market will grow from $105 million in 2022 to $133 million in 2027. And it will grow at a CAGR of 4.8% between 2022-27.

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Commonly Used Anti-Swing Devices for Overhead Transmission Lines and Their Characteristics


1. Overview of the swing

Overhead transmission line conductors occur after eccentric icing, in the wind excitation generated under a low frequency, large amplitude self-excited vibration phenomenon. In layman’s terms when the wind blows to the non-circular cross-section of the wire due to icing, a certain aerodynamic force is generated. This will induce the wire to produce a low frequency (about 0.1 ~ 3 Hz), the large amplitude of self-excited oscillation, due to its form up and down, shaped like a dragon pendulum, called swing.

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