By Mark Landis While JADE Learning offers continuing education classes on the intricacies of alarm systems, there is often opportunity to improve upon these existing systems. These improvements could be by covering some previously missed access points to the home or by adding life safety features to improve not only […]
Fire Alarm Systems By David Herres Fire alarm systems are at least an order of magnitude more challenging to understand than homeowner-type smoke alarms, even if individual smoke alarms within the home are wired together to work in concert. Fire alarm work must not be taken for granted because if […]
The 2018 edition of NFPA 70E, Standard for Electrical Safety in the Workplace has been extensively revised and significant new requirements have been added.
Electricity is the most pervasive energy source present in the workplace and can present an extremely dangerous hazard to those who must work in proximity to energized conductors or energized circuit parts.
The 2018 edition of NFPA 70E: Standard for Electrical Safety in the Workplace contains many changes, text has been revised, some requirements have been relocated or deleted, and new material has been added. The common point of all changes is to make the standard easier for both employers and employees to understand and apply in the workplace.
For example, Section 105.3 has been revised to separate the employer and employee responsibilities into separate paragraphs. The changes make it clear that electrical safety in the workplace is the result of a partnership between employer and employee. Both must do their part.
In order to understand what a feeder is, it is best to start with what a feeder is not. The conductors between the utility service point and the service disconnecting means are service conductors, not feeder conductors. Special service conductor rules apply because these conductors do not have short-circuit or […]
May is designated as Electrical Safety Month and many organizations and employers take advantage of the focus on electrical safety to emphasize the importance of following safe working practices when working around energized equipment. The month of May is fast passing and the Memorial Day holiday is approaching, but we […]
When reading a book, how often do we skip past the introduction and start with the chapters that interest us? That happens to those of us that use the NEC as well, but understanding the introduction to the code in Article 90 is key to properly applying the technical requirements […]
Feeders Part 3 Feeder Conductor Ampacity. The conditions of use must be considered when determining the minimum size of a feeder conductor. A continuous load, such as the lighting load in a store building, generates heat in the feeder conductor that must be compensated for. Ambient temperatures above 86oF or more than […]
The general rule in 215.3 is that a feeder overcurrent device shall have a rating not less than the noncontinuous load plus 125% of any continuous loads supplied by the feeder. Unless permitted for specific applications, such as motor circuits, the rating of the feeder overcurrent device is selected as […]
A multiple-outlet branch circuit is a branch circuit that supplies two or more outlets. With the exception of the required small appliance, laundry, and bathroom receptacle circuits in dwelling units, those outlets may be a combination of lighting outlets for luminaires, receptacle outlets for cord and plug connected utilization equipment […]
Don't wait for an Electrical Inspector to teach you the 2023 NEC. Save time, money, and pass inspections the first time by completing our online continuing education courses.