Q. Section 110.14(C) requires the use of the 60°C column for 100A or less and the 75°C column for above 100A for conductor sizing. What is the value of THHN rated 90°C if the ampacity cannot be used for conductor sizing?
Q. A single main breaker is installed, then taps supply individual meters with disconnecting means for individual tenants. Should a main bonding jumper be installed at the single main breaker or at each separate disconnect?
Q. When a conduit leaves a Class I, Division 1 classified paint spray room and goes under the concrete floor into a cabinet in the motor control room that is non-classified, is one sealing fitting in the paint mix room sufficient, or is an additional sealing fitting required in the non-classified area as well?
For decades, versatility and potential cost savings have spurred the use of medium voltage variable frequency drives (VFDs) in a wide range of applications. From pipelines with fluctuating flows to mine conveyors with variable throughput,...More
Testing for earth ground resistance is essential for two important reasons: safety and equipment uptime. Without an effective grounding system, fault currents have no safe path to ground, and those current will find unintended paths that could include people. Poor grounding is also a cause of poor power quality....More
The electrical industry spends hours participating in training in order to understand the revisions found in the 2014 NEC that will enhance electrical safety for our community. Electrical code revisions also serve as a significant catalyst that enables investment,...More
Thermal imaging is a proven technology that has enhanced the troubleshooting abilities of electrical and construction professionals. With the incredible advancements in technology and at very affordable prices......More
Considering the devastating impact of ground faults and the arc flash hazard, electrical safety is an essential priority for every business. Electrical reliability and safety starts with the decision on which grounding system to employ....More
Our new TVB810 TV Box™ delivers the ultimate in versatility for installing wall-mounted TVs in retrofit projects. There's more room in the box for wires; plus, you can install it horizontally or vertically to ensure proper positioning of low voltage connections behind the TV....More
Arlington’s new non-metallic adjustable mounting brackets are perfect for low voltage installations when the final wall thickness is unknown. Set for a 1/2" thick wall finish, they adjust to accommodate a finished wall up to 1-1/2" thick. Support tabs deliver extra-secure mounting of bracket to wood or steel studs in new constructions....More