MV power cables are perceived as commodities, but are all makes alike?Shielded, 90 [degrees] C (Type MV-90), medium-voltage(MV) power cane (5kV to 35kV) has long been considered a commodity product, with little differentiation seen between...
Reduced starting currents don't justify derated controllers, but different motor time ratings may affect required horsepower ratings.An elevator service firm reported that it was seeing motor starters for some of the elevators it was working on...
The complaintThe essence of the complaint was that the wrong Technical Committee has been given jurisdiction over the material in Section 6-2 of the Fire Pump Standard. The complaint asked that when the Council issued the new edition of NFPA 20 ...
Electrical design based on total reliability results in smooth operations and client satisfaction at recently constructed bank site.When lightning strikes, the consequences can be devastating to an electrical system. In any industry, the...
Q We recently installed a new steam pressure reducing station in an existing 6-m. 150-lb steam line. After reinsulation of the pipe with foil-jacketed, 2-in.-thick fiber glass, electrical arcing started between the new insulation foil jacket and...
In a little more than a year from now, most of your new motors must meet new efficiency levels mandated by federal legislation.On October 24 of next year and thereafter, most new motors manufactured must be of "energy-efficient" design. The Energy...
In today's ever-changing economy, companies across the country are striving to lower operating costs and trim their budgets. As a result, an increasing number of businesses are starting to pay more and more attention to their utility bills as well...
Hundreds of thousands of PID controllers are used each year to control industrial processes, and it is important to become familiar with their operation.What is a process controller? In simple terms, it's a device that measures an input and then...
The ability to allow kitchen countertop receptacles located below the countertop is more limited than some have interpreted.Important changes have been made that reduce the number of required receptacle outlets on island and peninsular countertops...
A small multifamily dwelling service change uses some innovative construction techniques, some of which could be used in industrial applications.In addition to some unusual design requirements covered in the last issue, the service change involved...
